Frequently Asked Questions
    Metal Cutting 
    in General
  • What is the correct definition: cutting tool or metal cutting tool?
    Historically, metals were the main materials to produce machined parts. Therefore, cutting tools were intended primarily for machining metals, and this determined their name. Today the term "metal cutting tool" is rare enough, while simply "cutting tool" is much more common; and these two definitions have become synonyms.
  • What is "primary motion" and "feed motion"?
    In machining, the primary motion is a rectilinear or rotational motion of a cutting tool or a workpiece that provides the tool advance toward the workpiece to ensure chip removal. In a machining process, the primary motion features the maximum speed and most of the energy, which is required for machining, when compared to all other motions. The primary motion in turning, for example, is the rotation of a workpiece, while in milling, the primary motion is the rotation of a mill.

    The feed motion is a rectilinear or rotational motion of a cutting tool, which adds the primary motion to complete cutting action. This motion features significantly less speed when compared to the speed of a primary motion.
  • What is the difference between macro- and micro geometry of a cutting edge?
    Macro geometry of a cutting edge relates to the key elements of a tool cutting wedge that determine the tool cutting capabilities such as the shape of the rake face, the rake angles, the clearance angles etc. Micro geometry is a microscopic-scale condition of the edge, which is known also as the edge preparation. Depending on the edge condition, the edge can be sharp, rounded (honed), chamfered edge or combined comprising combinations of rounding and chamfering.
  • What is the difference between specific cutting forces that are designated as kc and kc1?
    "kc" relates to actual specific cutting force - the force that is needed to remove a material chip area of 1 mm2 (.0016 in2), which has actual average chip thickness maintained in a machining process.
    "kc1" is commonly used for designating the specific cutting force to remove a material chip area of 1 mm2 (.0016 in2) with 1 mm (.004 in) thickness.
    However, in some technical data sources, the actual specific cutting force may be designated by "kc1", and specific cutting force to remove a material chip area of 1 mm2 (.0016 in2) with 1 mm (.004 in) thickness by "kc1.1". Number "1" that follows index "c" relates to 1 mm2 chip area, and addition "1.1" highlights "1 mm2 chip area with 1 mm thickness".
  • จัดประเภทเครื่องมือตัดแบ่งอย่าไงไร
    มีลักษณะเด่นในการจำแนกเครื่องมือตัด
    • กระบวนการตัดเฉือนซึ่งมีวัตถุประสงค์เพื่อใช้เครื่องมือ(เครื่องมือกลึง เครื่องมือกัด เครื่องมือเจาะ ฯลฯ )
    • การเคลื่อนไหวหลัก(หมุน และไม่หมุน)
    • จำนวนของเครื่องมือตัด (เครื่องมือปลายแหลมที่มีคมตัดเพียงอันเดียว และเครื่องมือหลายปลายที่มีคมตัดมากกว่าหนึ่งคมตัด)
    • แนวคิดการออกแบบเครื่องมือ (แบบแข็งหรือแบบชิ้นเดียวและประกอบ)
    • วิธีการติดตั้งเครื่องมือ (เครื่องมือแบบเจาะ เครื่องมือแบบด้าม)
    • ความสามารถในการปรับ (ปรับ และ ปรับไม่ได้)
  • เครื่องมือใดที่ถือว่าเป็นมาตรฐาน
    คำจำกัดความของ "เครื่องมือมาตรฐาน" มีสองอย่าง ในแง่หนึ่ง, อาจหมายความว่าเครื่องมือเป็นไปตามข้อกำหนดของมาตรฐานแห่งชาติ (สากล). ในแง่อื่น, ผู้ผลิตเครื่องมือตัดใช้คำจำกัดความนี้เพื่อระบุผลิตภัณฑ์ในสต็อกของการจัดส่งแบบมาตรฐาน
  • คำที่ถูกต้องคือ "เครื่องมือประสาน" หรือ "เครื่องมือบัดกรี" คืออะไร
    ส่วนใหญ่ ทั้งการประสานและการบัดกรีเกี่ยวข้องกับกระบวนการเดียวกัน ในขณะที่ฟิลเลอร์มีจุดหลอมเหลวต่ำกว่าวัสดุที่เชื่อมเข้าด้วยกัน ความแตกต่างที่สำคัญระหว่างการบัดกรีและการบัดกรีคืออุณหภูมิในการทำงานของกระบวนการ ซึ่งน้อยกว่าสำหรับการบัดกรีและตามลำดับ ประเภทของฟิลเลอร์ ข้อต่อประสานมักจะมีความแข็งแรงสูงกว่าเมื่อเปรียบเทียบกับการต่อแบบบัดกรีเกี่ยวกับเครื่องมือตัด ใช้คำว่าประสานจะถูกต้องกว่า
  • การกลึงตัดแบบเคลื่อนไปมา" คืออะไร?
    การกลึงตัดแบบเคลื่อนไปมาเป็นเทคนิคการกลึงตัดที่รวมการเคลื่อนไหวหลักเข้ากับการเคลื่อนที่เข้าออกของเครื่องมือกลึงตัดให้เข้ากับชิ้นงาน เพื่อหักเศษ
  • What is the concept of high-efficiency machining?
    High-efficiency machining (HEM) is a milling method much like high-speed machining (HSM), which utilizes a large axial depth of cut and a small radial depth of cut in combination with high rotational velocity (spindle speed) of the tool. However, the radial depth of cut varies depending on the angle of tool engagement to facilitate constant chip thickness per cutting edge during tool rotation. This method assures efficient use tool use for the uniform development of wear that covers a large section of the tool's cutting edge. HEM is often referred to as "dynamic milling" and features productive rough milling operations. HEM demands appropriate capabilities of CAM and CNC to generate the required toolpath.
  • What is the reference system of planes?
    The reference system of planes is a rectangular coordinate system with the origin in a selected point of the tool's cutting edge. This system is used to specify the angles that determine the cutting geometry of a tool.
  • How is the reference system for planes selected?
    The reference systems for planes are defined in the following manner: - the tool-in hand system, which specifies a tool cutting geometry for design, manufacturing, and measuring process of the tool. - the tool-in-use system is used to specify the cutting geometry of the tool in use. - the machine system is intended for checking the geometry when the tool is mounted in a machine. The tool-in-hand system relates to the element of a tool that is chosen as a base (datum). The tool-in-use system is aligned with the resultant cutting motion in a machining operation. The machine system uses the direction of primary motion as reference.
  • What are the main mechanisms of tool wear?
    The main mechanisms of tool wear are as follows: - Abrasive wear, is due to the heterogeneous metallurgical structure of the workpiece material, that features particles of different hardness. This causes the tool to be exposed to impact like abrasive machining and the removal of cutting material from the tool. - Mechanical wear is caused due to excessive mechanical load that can lead to a damaged cutting edge. - Adhesive wear occurs at specific values of cutting speeds and temperature in the cutting zone, which results in tool areas being welded with the particles of the removed material. This forms a foreign reinforced material that becomes the cutting edge and changes the cutting geometry. - Oxidation wear happens when the oxygen in the air reacts with the upper layer of the cutting material under high temperature in the cutting zone. - Diffusion wear occurs because of the tool's joint diffusion of material particles, the machined workpiece, and the formed chips. This changes the composition of the cutting material and diminishes its cutting capabilities.
  • What is a wedge angle?
    In cutting tool geometry, the wedge angle refers to the angle between the face and the flank of a cutting tool. Depending on the plane in which this angle is measured, it can be called a normal wedge angle or a back wedge angle.
  • What are tool angles and working angles, and what is the difference between them?
    Tool angles and working angles refer to the angles that define the position of the cutting edge, face, and flank of a cutting tool. These angles include the cutting-edge angle, rake angle, clearance angle, and so on. The difference between tool angles and working angles can be understood as follows: Tool angles determine the position of these cutting tool elements when considering the tool as a separate object. Therefore, tool angles are measured in the tool-in-hand reference system of planes. On the other hand, working angles determine the position of these elements during the cutting action of the tool, and they are measured in the tool-in-use reference system.
  • What is a cutting geometry?
    Cutting geometry, also known as "tool geometry", is the shape of the cutting part of a tool that enables effective cutting action. The cutting geometry can be broken down into macro- and micro- geometries. The macro cutting geometry refers to the shapes of the tool's face and flank while micro cutting geometry relates to the minute details or the fine structure of the tool's cutting edge.
  • What is the tool's wear land?
    The tool's wear land is an area on the tool's flank that experiences abrasion due to the friction caused by hard inclusions of the workpiece material during the cutting process. The extent of this wear is quantified by measuring the width of the wear land, commonly designated as "VB".
  • What are the beneficial effects of oil-water emulsions used as coolants in cutting processes?
    An emulsion is essentially a mixture of liquids that are typically immiscible. In the case of oil-water emulsions, which are intended for cutting, these two liquids are oil and water. An oil-water emulsion, when used in cutting, serves a dual purpose: it cools and lubricates. The water in the emulsion functions as a coolant, while the oil acts as a lubricant. Therefore, this emulsion serves as a cooling lubricant. Oil-water emulsions are also known as cutting or machining emulsions, soluble oils, and semi-synthetic coolants.
  • What is the purpose of honing the cutting edge?

    The process of honing the cutting edge involves rounding and smoothing the edge, which helps to eliminate various micro-defects and flaws that may have developed during the tool's production.

    In the manufacturing of coated indexable inserts and solid tools made from cemented carbides, honing is a common technological requirement. This is because the coating substance often accumulates on the sharp edge throughout the coating operation, and honing is essential to remove an unwanted excessive deposition in such cases.

    Do not confuse this with honing, which is a process of fine hole machining performed using a special abrasive tool known as a "hone".

  • When speaking about chipping as a type of cutting tool wear, what is the difference between micro-chipping and macro-chipping?
    The difference between micro-chipping and macro-chipping relates to the length of lost fragments of cutting tool material along a cutting edge. There are various quantitative definitions for the limiting length to specify this difference. For example, ISO 8688 considers chipping with lengths less than 0.3 mm (0.012") as micro-chipping, and lengths from 0.3 mm to 1 mm (0.012" to 0.04") as macro-chipping.
  • In machining, what is the difference between "accuracy" and "precision"?In machining, what is the difference between "accuracy" and "precision"?
    Although these terms are often used interchangeably in machining, there is a significant distinction between them. "Accuracy" refers to the degree to which a machined part conforms to the specified parameters (like dimensions, for example, or roughness values) within their tolerance limits outlined in the design. In contrast, "precision" relates to the repeatability of parameter measurements under the same conditions. Ideally, a machining operation or process should achieve both accuracy and precision: ensuring that the machined parameters meet the design specifications while maintaining consistency in those parameters.
  • What Is "Hybrid Machining"?
    Generally, hybrid machining (HM) is a manufacturing technology that combines two or more machining processes in a single machine setup. A typical example of this technology is machining on turn-mill or mill-turn machine tools. Today, however, the term "hybrid manufacturing" has received a broader definition and also relates to a combination of subtractive (literally, machining) and additive manufacturing (AM) processes. HM, which features a synergy effect from these combinations, aims to increase production efficiency and allows for a significant reduction in production time.
  • What are the advantages of pinpointed coolant supply?

    Pinpointed coolant supply through a tool’s body, directed precisely to the cutting zone, offers significant benefits. The main advantages are as follows:

    • Enhanced cooling and lubrication effectiveness.
    • Improved chip evacuation.
    • Consequently, pinpointed coolant supply noticeably reduces tool wear and extends tool life. This allows for increased cutting parameters and higher productivity.

  • What is the difference between chips and swarfs?
    In metal cutting, both “chips” and “swarfs” relate to material removed from a machined workpiece and are often used as synonyms. However, there is a difference between the two terms. Strictly speaking, “chips” are the small fragments removed from the workpiece material during the cutting process. “Swarfs,” on the other hand, describes all waste material produced during machining, which includes chips as well as shavings, dust, and other collective debris.
    Milling in General
  • What is a cutting edge angle and what is a lead angle?
    There are various international and national standards that specify the active geometry of cutting tools very precisely. The “cutting edge angle” is the angle between the main cutting edge of a milling cutter and the plane containing the direction of feed motion. "Lead angle" (or “approach angle”) is the angle complementary to the cutting edge angle, i.e. the sum of these both angles is 90°. For example, for a typical face milling cutter the cutting angle is the angle between the cutting edge and the plane, which the cutter generates. If this angle is 60°, then the lead angle will be 30°. The cutting edge angle and the lead angle are equal only for 45° milling cutters. The term "lead angle" is more commonly employed in the U.S., while "approach angle" is often used in Europe.
  • What is the difference between "face mill" and "shell mill"?
    These two terms relate to different and complementary features of milling cutters. They are not interchangeable. Milling cutters are classified according to the following main factors:
    • Machine surface type: plane, shoulder, 3D-surface, etc.
    • Cutter mounting method: on mandrel or arbor, in holder, directly in spindle
    • Structure: monolithic; assembled
    • Cutting part material: high speed steel, tungsten carbide, ceramics, etc.)
    "Face mill" characterizes a main field of application - milling flats by the cutting face of a mill. "Shell mill" refers to the design configuration of a mill: the mill has a central bore for mounting on arbor. This configuration is typical for face mills.
  • What is the difference between heavy and heavy-duty milling?
    Sometimes the terms “heavy” and “heavy-duty” are used mistakenly as synonyms. In principle, “heavy milling” (and “heavy machining") relates to milling large-sized and heavy-weight workpieces on powerful machine tools and refers more to the dimensions and mass of a workpiece. “Heavy-duty” specifies a degree of tool loading and mainly characterizes a mode of milling.
  • Which cutting conditions are considered as unfavorable and which are unstable?
    Unfavorable cutting conditions include:
    • workpiece with skin (siliceous or slag, for example)
    • significantly variable machining allowance
    • considerable impact load due to non-uniform machined surface
    • surface with high-abrasive inclusions
    Unstable cutting conditions refer to the low stability of a complete system (machine tool, workpiece holding fixture, cutting tool, workpiece) due to:
    • poor tool and workpiece holding
    • high tool overhang
    • non-rigid machine tools
    • thin-walled workpiece
    The terms "unfavorable" and "unstable" are not interchangeable.
  • How is average chip thickness measured?
    In milling, the thickness of chips is not constant and varies during cutting, depending on several factors. The average chip thickness (hm) is a virtual parameter that characterizes mechanical load on a milling cutter and a machine tool. There are different methods for calculating hm. The most common method is to compute it in relation to the half of an angle of engagement, where the latter is the central angle that corresponds to the arc of a contact between a milling cutter and a workpiece.
  • What is high pressure coolant (HPC) and ultra high pressure coolant (UHPC)?
    There are no strict definitions of high and ultra high pressure coolant (HPC and UHPC correspondingly). Traditionally, machine tools feature coolant supply at pressure 10-15 bar (145-217 psi). This level is now considered as low pressure.
    Various modern machining centers have the option to supply coolant at rates of 70-80 bar (1000-1200 psi), which is considered as high pressure coolant. Ultra high pressure coolant relates to pressure values of 100-200 bar (1450-2900 psi) and even higher.
    Some producers of CNC machine tool equipment manufacture what are known as “medium pressure” pumps; these have values of up to 50 bar (725 psi).
  • What are the benefits of milling with high pressure coolant (HPC)?
    Heat generation is a permanent feature of machining, particularly, milling. If heat generation is intensive, the conventional low pressure coolant forms a vapor layer on the surfaces of a tool and a workpiece. This layer acts as heat sealing, producing an insulating barrier and making heat transfer harder, which significantly shortens tool life.
    Pinpointed high pressure coolant penetrates the barrier and helps to overcome the problem. HPC chills chips quickly, making them hard and brittle. The chips become thinner and smaller, and they break away from the workpiece more easily. High-velocity coolant flow removes the chips. This significantly improves chip evacuation and prevents chip re-cutting.
    HPC improves tool life of a cutting edge due to reducing oxidation and adhesion wear and increasing crack strength. HPC improves chip evacuation because the chips diminish in size, and the high-velocity coolant flow takes them away easily. It allows the design of cutters with smaller chip gullet, leading to a higher number of cutter teeth. Effective cooling reduces the temperature in the cutting zone, ensuring an increased width of cut.
    Overall, HPC provides a good solution for increasing cutting speed and feed rate for boosting productivity.
  • What is the difference between milling with high pressure coolant (HPC) supply through a tool body and turning with HPC?
    In turning, a tool has one cutting edge, while a milling tool features several cutting teeth. The number of coolant outlets in the milling tool is greater. An indexable extended flute cutter, where the teeth are produced by sets of replaceable inserts, will require many more outlets.
    There is a specific relationship between pressure, velocity and flow rate for fluid, e.g. for coolant. In milling, HPC supply through the tool body demands appropriate characteristics of an HPC pump to ensure correct flow volume (flow rate) and not only to meet pressure requirements.
  • Does ISCAR provides indexable cutters for high pressure coolant milling in the standard product line?
    Yes, ISCAR provides these tools in the families of milling cutters for machining titanium and high temperature superalloys (HTSA).
  • Why are nozzles used as coolant outlets in HPC indexable milling cutters?
    There are two reasons for using nozzles as coolant outlets: technological and applicative. HPC supply through the body of a cutter requires small-diameter outlets (as well as demands regarding the shape). As manufacture of the outlets via drilling hard steel tools would encounter technological difficulties, screw-in nozzles represent a more practical option.
    If a depth of cut is smaller than the maximum cutting length of an indexable extended flute milling tool, there is no need to supply coolant to the inserts that are not involved in cutting. To improve performance, you can easy unscrew the appropriate nozzles from their holes, and then close the hole by a plug or a standard set screw.
  • Why are a significant number of HPC milling cutters special (tailor-made)?
    The main consumers of HPC milling cutters are manufacturers working with hard-to-cut materials, for example titanium alloys. In many cases, producing parts from the materials requires a high volume of metal removal. To boost productivity, manufacturers often use unique machine tools, and, to reach maximum operational rigidity, they prefer integral tools with direct adaptation to the spindle of a machine - without intermediate tooling such as arbours or holders. Specific tool diameters, cutting lengths, and overhang, as well as adaptations that vary from one manufacturer to another, demand tailor-made HPC milling cutters.
  • Which families are included in ISCAR’s indexable milling line?
    The indexable milling line consists of cutters intended for the main types of milling operations: milling right shoulders, milling open faces, milling edges (edging) and deep shoulders, milling 3-D surfaces (profile milling), milling slots and grooves, milling chamfers, etc. Separate families of cutters have been developed to handle fast feed milling (a specific machining technique).
  • The logos of various ISCAR’s indexable milling families start with the wording “HELI” (a derivative from “helix”), and phrases such as “helical cutting edge” and “helical milling” are often emphasized as benefits in technical information. Why?
    In the early 1990’s, ISCAR introduced the HELIMILL – a family of milling tools carrying indexable inserts with a helical cutting edge. The highly effective edge was generated by the intersection of the shaped insert top (rake) face and the helical insert side (relief) surface. The design of the HELIMILL tools formed a constant positive rake and a constant relief along all cutting lengths. This feature immediately caused a significant reduction in power consumption and ensured a smooth cut. The HELIMILL heralded a new design approach that is considered today as the acknowledged format in indexable milling, and positioned the shaped surfaces of an insert into the forefront. The wording “HELI” reflects the helical cutting edge as a significant factor in the advancement of these indexable milling families.
  • Does ISCAR provide indexable milling cutters for machining aluminum?
    Yes. ISCAR has developed an entire comprehensive range of indexable milling cutters, designed specifically for the efficient machining of aluminum. Each family of these high-quality cutters features integral or lightweight body designs, unique principles of carbide insert clamping, structures with adjustable cartridges, various ground and polished inserts with different corner radii and, most popular in aluminum machining, inserts with polycrystalline diamond (PCD) tips. The vast majority of the cutters have inner channels for coolant supply through the body. The ISCAR HELIALU line of indexable milling tools enables efficient high speed machining (HSM) of aluminum, ensuring powerful metal removal rates (MRR).
  • The term “high positive” is often used when speaking about indexable milling cutters. What does it mean?
    Generally, this term relates to rake angles of an indexable milling cutter. Advances in powder metallurgy have resulted in the production of helical-cutting-edge inserts with a rake face that is “aggressively” inclined with respect to the insert cutting edge. This causes a significant increase in the positive rake angles (normal and axial) of a cutter carrying the inserts. The definition “high positive” emphasizes this feature. Note: This definition reflects the current state of the art. As the production of tools with cemented carbide inserts does not deplete its own resources, we may assume that the “high positive" of today will be considered as “normal” tomorrow.
  • Cemented carbide is a main cutting material for indexable inserts. ISCAR provides a rich variety of carbide grades. Where can I find basic information about the properties of a grade, recommended cutting speeds and application range?
    ISCAR offers a range of electronic and printed catalogues to reference guides that contain this information and specify the structure of a grade (substrate type, coating), the application range in accordance with ISO standards and the range of cutting speeds. Contact ISCAR representatives in your region for details and assistance.
  • Do the indexable milling cutters have internal channels for coolant supply?
    Most of the indexable milling cutters introduced recently feature an inner channel for coolant supply to each insert directly through the cutter body.
  • There are face shell mills that do not have these channels. If an internal coolant supply is necessary, how I can modify the mills?
    In most cases, this modification is not needed. Instead, ISCAR proposes clamping screws with adjustable nozzles to provide a simple solution to the problem. The screws not only secure the shell mills on arbors but provide effective coolant supply directly in the cutting zone and improve chip evacuation. A nozzle, the movable part of the screw, allows easy adjustment of coolant supply depending on the depth of a mill countersink depth, insert sizes or application needs.
  • How I can guarantee applying correct torque for tightening clamping screws that secure inserts in the milling cutters?
    In indexable milling lines, ISCAR provides two types of torque keys: with adjustable and fixed torque value. The first type allows the user to set torque within an available range, while the second type features a fixed torque value that is already preset. Information about which torque is necessary for tightening screws, which secure the inserts, can be found in catalogues, technical guides and leaflets. In addition, this data is now printed on the milling cutter body as a mark detail.
  • What is better for control productivity – varying the feed or the depth of cut within acceptable limits?
    It should be noted that the question has no unambiguous answer and depends on several factors. However, in general, under the same MRR, increasing the feed coupled with reduced depth of cut is more favorable than the opposite combination (lesser feed with deeper cut) because it normally results in greater tool life.
  • How can I find a more efficient indexable milling cutter for my applications?
    If you know the application parameters, ITA (ISCAR Tool Advisor), a computer-aided search engine, can be a very effective tool. This software is free and it may be installed even on your smartphone. If your question relates to more broad issues and considerations about selecting a suitable family of cutters, we have specific recommendations regarding priorities – please contact our representatives for assistance.
  • What is turn-milling?
    Turn-milling is a process whereby a milling cutter machines a rotating workpiece. This method combines milling and turning techniques and has many advantages.
  • What are the advantages of turn-milling comparing with classical turning?
    • In turning, machining non-continuous surfaces features interrupted cutting that results in unwanted impact load, poor surface finish and early tool wear. In turn-milling, the tool is a milling cutter that is intended exactly for interrupted cuts with cyclic load.
    • When turning materials with long chips, chip disposal is difficult and identifying the correct chipbreaking geometry of a cutting tool is not simple. The milling cutter used in turn-milling generates a short chip that considerably improves swarf handling.
    • In turning eccentric areas of rotating components (crankshafts, camshafts, etc.), off-center masses of the components cause unbalanced forces that adversely affect performance. Turn-milling with its low rotary velocity of a workpiece significantly diminishes and even prevents this negative effect.
    • In turning, the rotation of heavy-weight parts, which defines the cutting speed, is limited by the characteristics of the main drive. If the drive does not allow rotation of large masses with required velocity, then the cutting speed will be far from the optimal range; and will resulut in low turning performance. Turn-milling provides a way to overcome the above difficulties effectively.
  • How I can calculate cutting data for turn-milling?
    The calculation method is shown in the March 2017 issue of “Welcome to ISCAR’s World”, a collection of articles. The electronic version of the issue can be found also on ISCAR’s site catalogs. If necessary, please contact our local representatives in your area – they will be glad to help with this issue.
  • What is the difference between radial chip thinning and axial chip thinning?
    Chip thinning refers to decreasing maximum chip thickness hmax compared to feed per tooth fz.
    Two factors cause this decrease:
    • Cutting geometry of a milling tool, specifically the tool cutting edge angle χr when it is less than 90° ("axial chip thinning"). Good examples of axial chip thinning are fast feed milling and machining 3-D surfaces at shallow depth of cut by ball nose or toroidal-shape milling tools.
    • Influence of width of cut ae. If ae in peripheral milling and face milling is smaller than the radius of the milling tool, hmax becomes lower than fz. This effect is known as “radial chip thinning”. Understanding chip thinning is very important. Maintaining necessary chip thickness requires appropriate increase of feed per tooth and is a key element for correctly programmed fz.
  • What is a slab mill?
    A slab mill is a type of a cylindrical (plain) milling cutter – a milling tool with helical cutting teeth on its cylindrical periphery. Slab mills generally feature large sizes and have a central bore for arbor mounting, mainly in horizontal milling machine tools. Slab mill length is considerably greater than its diameter. These mills are intended for machining an open surface (mostly plane) of a workpiece when the surface width is less than the mill length. Slab mills were very common in the past but today they are used quite rarely.
  • What is “roll-in entering” a machined workpiece in milling?
    Roll-in entering (or, simply, rolling in) is a method of approaching a material in milling. In rolling in, a milling cutter enters the material by arc that causes a gradual growth of mechanical and thermal load on a cutting edge. This approach cut significantly contributes to machining stability and improves tool life. Rolling in is contrary to the traditional straight entering, when the load suddenly increases.
  • What are the advantages and disadvantages of clamping inserts in milling cutters by wedge?
    The main advantages of clamping indexable inserts in a milling cutter by wedge are quick and easy insert replacement or changing a worn cutting edge of the insert (the insert indexing). Clamping by wedge is more common for indexable face mills, especially large-sized. These mills usually work in tough conditions and often become hot. Machine operators prefer the wedge clamping design for such mills.
    However, the wedge, an additional part above the insert in the cutter structure, produces an obstacle for chip flow in the cutter chip gullet, which worsens chip evacuation and reduces cutter performance. This is a major disadvantage of wedge clamping. Intensive contact between the chips and the wedge results in the detrition wear of the latter and shortens its tool life.
  • How to estimate tool life for ceramic cutting tools?
    Ceramic tools behave differently than carbide tools. In most cases, the end of a tool life is determined by the acceptable level of burrs and not by wear size.
  • What is a router?
    In machining, the term "router" has several meanings. It may refer to a rotating tool for hollowing out ("routing") wood and plastic materials. "Router" refers also to a 3-axis CNC machine for cutting soft materials, such as wood, using a rotating tool. In metalworking, a "router" usually means an endmill, intended for milling aluminum at high cutting and feed speeds.
  • Flute or chip gullet?
    In milling cutter terminology, both words designate a chip space or a chip pocket – the shaped area of a milling cutter body that is intended for the flow of chips that are formed as a result of cutting. This space must be sufficient to enable a free, unrestricted chip flow. The term "chip gullet" is generally used to specify the chip space of indexable milling cutters, whereas "flute" is mainly applied to a solid mill design, where it means a helical groove that ensures chip flow and produces a sharp cutting edge or a mill tooth by one of its edges.
  • Chip breaker or chip former?
    A chip breaker is an area of a tool rake face that is specially shaped for breaking or controlling (forming) the produced chip. The term "chip breaker" is commonly used in turning operations, where breaking a long chip is one of the key success factors. In milling, the term "chip former" is generally used, as milling is an interrupted, "chip breaking" cutting process that focuses on chip forming.
  • Which depth of cut percentage is recommended with respect to the insert cutting edge length?
    In process planning, depth of cut is defined depending on operation, machine tool characteristics, rigidity and other factors.
    ISCAR catalogs specify the maximum depth of cut for each insert. Maximum depth of cut refers to the maximal length of the insert cutting edge that can machine.
    This value must not be exceeded. In most cases, inserts are operated at cutting depths of no more than 2/3 of the specified maximum.
  • What is "chip load"?
    The term "chip load" is often used as a synonym for the term "feed per tooth". This term is more common for the North American market. However, the correct synonym for "chip load" is "chip thickness". In shop talk "chip load" relates usually even to maximum chip thickness.
    In North American countries the term "feed rate" is often used instead of the ISO definition "feed speed". While on this subject, manufacturers can refer to "feed speed" as "table feed". The original term "table feed" refers to a classical milling machine, from previous generations, where feed motion was created by movements of the machine table.
  • What is the difference between "wiper flat" and "wiper insert"?
    A wiper flat is a small minor edge on a regular indexable insert in milling cutters to improve the quality of a machined surface. It is often referred to as a “wiper”.
    A wiper insert is a specially designed insert where the wiper flat is significantly larger than for a standard insert. When mounted in a milling cutter, the wiper insert protrudes 0.05…0.07 mm axially relative to a regular insert. A wiper insert "smooths down" the machined surface, noticeably improving surface finish.
  • What is "stepover" and what is "stepdown"?
    In multi-pass milling, "stepover" and "stepdown" refer to the distance between two adjacent passes. "Stepover" relates to this distance when, after finishing a pass, the milling cutter moves sideward and then performs the next pass. By contrast, if at the end of a pass the milling cutter moves downward to start the next part, the distance is called "stepdown". Sometimes "stepover" and "stepdown" are referred to as "sidestep" and "downstep" correspondingly although this is less common.
  • What is the difference between "gang milling" and "straddle milling"?
    Straddle milling is a type of gang milling.
    In gang milling, an assembled tool comprising two or more milling cutters mounted in the same arbor, machines several workpiece surfaces simultaneously. In straddle milling, two or more side-and-face milling cutters, mounted in one arbor, machine parallel planes of a workpiece. The planes are perpendicular to the arbor axis and feature an exact distance (distances) between them. To ensure the necessary accuracy of the distance (distances), the milling cutters are spaced apart with the use of bushings and spacers.
  • What is an "on-edge" insert?
    This term is used sometimes as another name for a tangentially clamped insert. When mounted in a cutter, the insert is placed "edgeways" ("on -edge"), and the largest cross-section of the insert is under the working cutting edge.
  • What is the difference between rough milling and finish milling?
    Rough milling focuses on high metal removal rates while finish milling assures precise accuracy on the milled surface.
    As a rule, finish milling features significantly smaller machining allowances when compared with rough milling.
  • What are the main types of edge conditions for indexable inserts?
    The cutting edge of an indexable insert may be sharp, rounded or chamfered. These are the basic types of edge conditions, also referred to as "edge preparation".
    In addition to the above, there are combined edge conditions such as chamfered and rounded, double-chamfered, and double-chamfered and rounded.
    A rounded edge can also be referred to as a "honed edge".
  • What are the advantages and disadvantages of wedge clamping indexable inserts?
    The wedge clamping principle, which is an alternative to a screw clamping concept, provides a more durable insert structure; there is no need for a central bore. A wedge clamp ensures quick and easy indexing and is very important when the insert is extremely hot due to heavy machining conditions.
    The wedge clamping method is most suitable for machining materials that produce short chips (i.e., cast iron).
  • When should I replace insert clamping screws that secure indexable inserts in the body of a milling cutter?
    An insert clamping screw requires thorough visual examination before using a milling cutter. The threads and head of the screw, as well as the socket for a key, should all be in good operating condition, and therefore, demand special attention. If these screw elements are damaged, or the screw is bent, the screw must be replaced immediately.
    When tightening a screw, apply the correct tightening torque and use the right key to prolong the wear life of the screw. Also, do not forget ISCAR’s recommendations for the application of an anti-seize lubricant when replacing an insert or its indexing. Following these obvious, but sometimes forgotten rules will increase the screw life.
  • How to determine when to replace an insert (change its cutting edge), a solid tool or an exchangeable head?
    The correct answers are: At the end of the tool life or upon reaching the wear limit. The life period of a tool or the wear limit for a cutting tool depends on various designs, operational and administrative factors.
    At the same time, during a machining operation, there are certain signs that can indicate the need to replace inserts, tools, or heads.
    • Noticeable increase of power consumption (spindle load)
    • Increased vibration and noise
    • Worsening of machining accuracy and a need for frequent additional tool dimensional adjusting
    • Reduced surface finish
    • Occurred burrs
    • A visual inspection of a cutting edge shows considerable flank wear, extensive edge chipping, cracks etc.
    For more detailed data on how to define a tool’s life in a specific case, we recommend contacting an ISCAR technical representative.
  • What is the principal difference between a "triangular" and "trigon" indexable insert?
    To be exact, both triangular and trigon relate to the same shape of a polygon – a triangle. A triangular insert features a triangular shape. In a trigon insert, the side of a polygon comprises two-line segments that have the same length and form an obtuse angle.
    From a geometrical point of view, a convex isotoxal hexagon is an accurate definition for the trigon insert shape. Under certain assumptions, this shape may also be referred to as a truncated triangle. However, neither of these names are commonly used, instead, trigon is the most known term today.
    To conclude: the trigon shape of an indexable insert relates to the form of a convex isotoxal hexagon.
  • What is the main design feature of a TANGFIN indexable face mill for superb finish of a machined surface?
    A TANGFIN face mill is based on a step-cutter-concept: the inserts are positioned in gradual locations on the mill in both radial and axial directions. This design causes each insert to cut only a small portion of the material in both radial and axial directions. The high surface quality is attained thanks to a very rigid clamping of the inserts together with the long and straight insert minor cutting edges. A final surface texture is provided by the axially protruding insert that serves as a wiper insert.
    Hence, the combination of the step-cutter robust design and the long wiper cutting edge, which is produced by the axially protruding insert, results in impressive surface finish parameters.
  • ภายในกลุ่มผลิตภัณฑ์ ISCAR มีมีดกัดขนาดเล็กไม่กี่กลุ่มที่มีเม็ดมีดขนาดเล็กที่สามารถถอดเปลี่ยนเม็ดมีดได้ ขอบเขตหลักของการใช้งานคืออะไร และมีดกัดเหล่านี้มีข้อดีอะไรบ้าง?
    กลุ่มผลิตภัณฑ์เหล่านี้มีช่วงเส้นผ่านศูนย์กลางที่เชื่อมต่อกับมีดกัดโซลิดคาร์ไบด์แบบดั้งเดิม อย่างไรก็ตาม ในการกัดที่มีระยะกินลึกตื้น จะใช้ความยาวตัดเพียงส่วนหนึ่งเท่านั้น ซึ่งทำให้การใช้มีดกัดโซลิดคาร์ไบด์ไม่มีประสิทธิภาพ ในหลายกรณี โดยเฉพาะอย่างยิ่งในการตัดเฉือนหยาบ ในทางตรงกันข้าม หัวกัดที่มีเม็ดมีดขนาดเล็กที่สามารถถอดเปลี่ยนเม็ดมีดได้ไม่เพียงแต่มีไว้สำหรับการใช้งานดังกล่าวเท่านั้น แต่ยังช่วยให้มั่นใจถึงการใช้ซีเมนต์คาร์ไบด์อย่างมีเหตุผลเนื่องจากความสามารถในการทำดัชนีของเม็ดมีด ดังนั้น หัวกัดแบบถอดเปลี่ยนเม็ดมีดได้ขนาดเล็กจึงเป็นทางเลือกที่สมเหตุสมผลและคุ้มราคาสำหรับมีดกัดโซลิดคาร์ไบด์ ซึ่งส่วนใหญ่ใช้ในการกัดหยาบ
  • อะไรคือความแตกต่างระหว่างการกัดกึ่งหยาบและการกัดกึ่งละเอียดในการกัด?
    ความแตกต่างอาจไม่ชัดเจนและมักถูกมองว่าเป็นคำพ้องความหมาย อย่างไรก็ตาม ในบางกรณีเมื่อการกัดพื้นผิวต้องใช้มากกว่าหนึ่งการทำงาน การดำเนินการเหล่านี้ถูกระบุว่าเป็นการกัดหยาบ การกัดกึ่งหยาบ การกัดกึ่งสำเร็จ การกัดเก็บผิวละเอียด การกัดละเอียดหรือการกัดหยาบ การกัดหยาบ การเก็บผิวกึ่งละเอียด และการกัดผิวละเอียด อนึ่ง สถานการณ์เดียวกันอาจสังเกตได้ไม่เฉพาะในการกัดเท่านั้น แต่ยังรวมถึงในการตัดเฉือนประเภทอื่นด้วย เช่น การกลึง
  • integral collet คืออะไร?
    โดยทั่วไป คอลเล็ตในตัวเป็นเครื่องมือที่มีด้ามเรียวสำหรับการติดตั้งโดยตรงในหัวจับปลอกรัด ER เมื่อเปรียบเทียบกับ แคลมป์ คอลเล็ตสปริงทั่วไป คอลเล็ตรวมจะให้ความแม่นยำและความแข็งแกร่งที่สูงกว่า
  • integral collets ของ ISCAR มีช่องระบายความร้อนภายในหรือไม่?
    โดยทั่วไปคือ ใช่ แม้ว่ากลุ่มคอลเล็ตรวมบางกลุ่ม เช่น กลุ่มที่มีการดัดแปลง MULTI-MASTER จะมีช่องจ่ายสารหล่อเย็นภายในสำหรับการจ่ายสารหล่อเย็นภายใน
  • การกัดแบบต่อเนื่องคืออะไร?
    การกัดต่อเนื่องเป็นวิธีการกัดพร้อมกันของชิ้นส่วนหลายชิ้นที่วางเรียงกันเป็นแถวขนานกับแกนหัวกัด
  • ระยะพิทช์ของเครื่องมือกัดคืออะไร?
    ระยะพิทช์คือระยะห่างระหว่างฟันซี่ข้างเคียงใกล้ที่สุดสองซี่ของเครื่องมือกัดที่วัดระหว่างจุดเดียวกันของคมตัดของฟัน ระยะพิทช์แสดงความหนาแน่นของฟันของเครื่องมือตามเครื่องมือกัดที่แตกต่างจากเครื่องมือที่มีระยะพิทช์หยาบ ละเอียด และละเอียดเป็นพิเศษ ระดับพิทช์แบบละเอียดแบบขนานกับแบบหยาบ-แบบละเอียด-แบบละเอียดพิเศษ มีการจัดระดับแบบอื่น เช่น: แบบหยาบ-แบบปกติ-แบบละเอียด,แบบปกติ-แบบปิด-แบบพิเศษ และอื่นๆ ที่มีอยู่ นอกจากนี้ เครื่องมือระยะพิทช์ละเอียดพิเศษยังเรียกว่าหัวกัดความหนาแน่นสูงอีกด้วย
  • การใช้งานหลักของ Shell Mill แบบถอดเปลี่ยนได้กับตัวเรือนไทเทเนียมคืออะไร?
    Shell Mill แบบถอดเปลี่ยนได้ของตัวเรือนไททาเนียม มีไว้สำหรับการกลึงตัดระยะยาวเป็นส่วนใหญ่
    เพื่อพัฒนาผลลัพธ์ให้ได้ผิวสำเร็จที่ดีเยี่ยม ขอแนะนำให้ติดตั้งหัวกัดบนตัวจับยึดเครื่องมือที่มีกลไกป้องกันการสั่นสะเทือน เช่น อะแดปเตอร์ WHISPER LINE ของ ISCAR
  • Which factors should be considered when determining the feed speed for milling by use of interpolation?
    When determining the feed for milling by interpolation, it is important to consider that the feed speeds (feed rates) of the cutting edge and the mill axis are different. This is unlike straight-line milling. In milling by use of helical and circular interpolation, the programmed feed speed in most CNC machines refers specifically to the axis of the cutter. When milling inside surfaces by interpolation, the feed speed of the mill axis is slower than that of the cutting edge. Conversely, when milling outside surfaces by interpolation, the feed speed of the mill axis is faster than that of the cutting edge. It is necessary to consider the above difference in feed speeds when setting the cutting data.
  • What is a "no mismatch" 90°-indexable milling tool?
    In machining square shoulders, the height of the shoulder can exceed the maximum depth of cut that is determined by the cutting length of an indexable insert mounted on a given tool. In such cases, multiple passes are required for shoulder milling. "No mismatch" refers to the ability of a precise indexable milling tool to ensure a true 90° shoulder profile without a noticeable border, step, or burr between the passes. This feature is essential for accurate square shoulder milling.
  • What is string milling?
    String milling is the milling method where a mill sequentially machines several workpieces that are arranged closely in the feed direction, resembling a string.
  • What is a sprocket cutter?
    A sprocket cutter is a type of form milling cutter specifically designed for machining sprockets of roller chain wheels. It may also be referred to as a sprocket-wheel cutter or chain sprocket cutter.
  • What is a step milling cutter?
    A step milling cutter is a type of mill with teeth that are equally displaced relative to each other in either the axial or radial direction. If the teeth are used by use of indexable inserts, the cutter is referred to as an indexable step milling cutter.
  • What is a level-first milling strategy?
    In milling, a level-first strategy refers to a milling method where the material is removed level by level, from the top of the workpiece to the bottom. This strategy is common for various rough and finish milling operations.
  • Are ceramic milling cutters, either solid or indexable, suitable for machining thin-walled workpieces made from aerospace materials?
    Due to the fact that ceramic milling cutters can produce a work-hardened material layer, their use in machining thin-walled workpieces should be examined with great care.
  • What is "generated corner radius" in milling?
    In milling, the generated corner radius is the actual radius of the arc formed on the workpiece by the rounded corner of a milling cutter after machining.
  • How to determine whether a milling tool is right-hand or left-hand?
    To determine this, examine the end of the milling tool that does the cutting. A right-hand (RH) milling tool cuts when it rotates counterclockwise (CCW), while a left-hand (LH) milling tool cuts when it rotates clockwise (CW).
  • How to define the helix hand of a solid endmill with helical flutes?
    To determine the helix hand, view the endmill from its end that does the cutting. For a right-hand (RH) helix, the flutes spiral outward from the center in a clockwise (CW) direction. For a left-hand (LH) helix, the flutes spiral outward in a counterclockwise (CCW) direction.
  • What is hard milling and what are the advantages of this milling method?
    Hard milling refers to the process of milling high-hardness steel and cast iron that have been hardened typically to HRC 45–65. Compared to the traditional approach, which involves machining a workpiece in its soft or pre-hardened state followed by heat treating and then grinding the hardened material, hard milling greatly reduces the number of required setups.
    This brings manufacturers closer to achieving a longstanding goal: complete machining of a part in a single setup, without the need to reposition the workpiece between operations.
    With hard milling, post-machining hardening of the workpiece is no longer necessary.
    Therefore, hard milling is an effective method for boosting productivity and shortening delivery times.
  • What are the main difficulties in hard milling?
    Hard milling presents several challenges that make this machining method particularly demanding. The high hardness of the materials greatly intensifies tool wear.
    Additionally, cutting hard materials requires much greater cutting forces, which substantially raises the mechanical load on both the cutting tool and the machine. This can increase vibration, shorten tool life, and negatively impact surface finish.
    Moreover, higher cutting forces result in significant heat generation, which can adversely affect both the tool and the workpiece.
    Profile Milling
  • What is the difference between profile milling, milling contoured surfaces and form milling?
    Generally, these definitions mean the same thing and relate to milling 3-D surfaces. Such kind of machining is often named in shop talk as simply profiling.
  • Which industrial sectors are characterized by a great number of profile milling operations?
    First, it is the Die and Mold industry, then Aerospace but almost every branch requires profile milling tools in a varying degree, too.
  • Which types of tools are the most popular for profile milling?
    In rough milling for “pre-shaping” further 3-D surfaces, process planners use different tools and even general-duty 90° milling cutters. Fast Feed milling cutters* are very efficient means for high-efficiency roughing. However, most of profile milling operations relate to toroidal and ball nose milling cutters because they ensure correct generation of a needed shape in every direction.

    * refer to the appropriate section in FAQ session
  • Are inserts with chip splitting action in ISCAR’s profile milling products?
    Yes. Moreover, exactly from MILLSHRED, a family of indexable milling cutters with round inserts, the serrated cutting edge of ISCAR milling inserts was started its way.
  • What is the effective cutting diameter of a profile milling tool?
    In profile milling, due to the shaped, non-straight form of the tool, a cutting diameter is a function of a depth of cut; and it is not the same for different areas of the tool cutting edge that is involved in milling. The effective diameter is the largest true cutting diameter: maximum of the cutting diameters of these areas. In calculating cutting data, it is very important to consider the effective diameter, because the real cutting speed relates to the effective diameter, while the spindle speed refers to the nominal diameter of a tool.
  • Which types of profile milling tools ISCAR provides?
    ISCAR line of profile milling tools comprises Fast Feed*, toroidal, and ball nose cutters in the following design configurations:
    • tools with indexable inserts
    • solid carbide endmills
    • replaceable milling heads with MULTI-MASTER* adaptation

    * refer to the appropriate section in FAQ session
  • What is restmilling?
    Productive milling proposes applying more durable and rigid tools for high metal removal rate. In many cases the form and the dimensions of the tools do not allow for a cut in some area; for example, the corners of a die cavity. The remainder of the material in the areas is removed by restmilling – a method under a technological process where a tool of smaller diameter cuts the areas with residual stock.
  • Does ISCAR recommend the use of “plungers” for profile milling?
    Yes, in cases of large overhang we recommend the use of cutters/plungers on the Z axis, as this will result in a more productive milling operation with less vibration in profiling/roughing. The depth of cut for plungers with overhang is higher than ap for conventional systems, obtaining a higher metal removal rate. ISCAR offers a variety of plungers and, to achieve important lengths, we recommend use of the ITS modular system.
  • What is ISCAR's "rule of 12" for ball nose cutters?
    "The rule of 12" is a rule of thumb that may be useful for quick estimation of the relation between a depth of cut and a width of cut (a stepover) when milling ISO P materials (soft and pre-hardened steel, ferritic and martensitic stainless steel) by ball nose cutters. In accordance with the rule, if a depth of cut is the half of a cutter diameter (D/2), a recommended width of cut (a stepover) should be no more than D/6; for the depth of cut D/3 the maximal width of cut should be D/4 etc.
    It is not difficult to see that 2×6=3×4=12.
  • In face milling, a recommended width of cut is often given as a ratio to a tool diameter. When using a mill with round inserts, which tool diameter should I consider?
    The correct way to decide is by calculating the width of cut with the effective diameter of the mill with round inserts – the largest of the tool diameters that’s involved in cutting.
    This diameter is a function of the depth of cut, or by using the cutting diameter of a face mill for such a calculation. In accordance with standard ISO 6462, the cutting diameter is defined by the point that is produced by the intersection of the major cutting edge and the machined plane. This is the smallest tool diameter involved in cutting, while the cutting diameter is one of the main milling dimensions. This is also specified in the ISCAR catalog.
    Here are some rules for quick estimating the cutting diameter:
    If a face mill carries an even number of round inserts, the cutting diameter may be considered accurate enough as the distance between the centers of two opposite inserts. In other words, it is the mill’s maximum diameter minus the insert diameter.
    If the cutter has an uneven number of inserts, the cutting diameter is approximately equal to the doubled distance from the mill axis to an insert center.
    Using the maximum mill diameter as a base for calculating the width of cut is acceptable only when the depth of cut is close to the insert radius. In any other case, this calculation may cause intensive insert wear.
  • รูปแบบของมีดกัดคืออะไร?
    หัวกัดแบบฟอร์มเป็นชื่อทั่วไปสำหรับหัวกัดที่มีจุดประสงค์เพื่อสร้างพื้นผิวโค้ง (ซับซ้อน)
  • กลุ่มผลิตภัณฑ์หัวกัดทรงบาร์เรล(ส่วนกลม)ของ ISCAR มีอะไรบ้าง
    ผลิตภัณฑ์หัวกัดทรงบาร์เรลของ ISCAR ประกอบด้วยดอกกัดโซลิดคาร์ไบด์ ,
    หัวคาร์ไบด์ MULTI-MASTER และเอ็นมิลแบบถอดเปลี่ยนได้ประเภทเม็ดมีดเดี่ยว ตามโปรไฟล์การตัด รูปทรงของหัวกัดเหล่านี้สามารถแบ่งออกเป็นทรงบาร์เรล ทรงรี ทรงเรียว เลนส์ และแบบรวมกัน
    Solid Endmills
  • Does ISCAR provide solid carbide endmills for machining all groups of engineering materials?
    ISCAR’s SOLIDMILL line consists of various families of solid carbide endmills that are intended for machining different materials: steel, stainless steel, cast iron, etc. The line offers a rich variety of tools covering all application groups under ISO classifications P, M, K, N, S and H.
  • Which types of solid carbide endmills does ISCAR offer as standard products?
    ISCAR’s standard solid carbide endmill products include 90° endmills, ball nose cutters, and tools for high feed (fast feed) milling, chamfering, and deburring. ISCAR also offers families of endmills designed specifically for high speed machining that apply trochoidal milling techniques.
  • What are the advantages of the trochoidal milling method?
    Usually, trochoidal milling is applied to machining slots and pockets. In trochoidal milling, a fast-rotating tool moves along an arc and “slices” a thin but wide layer of material. When the layer is removed, the cutter advances deeper into the material radially and then repeats the slicing. This method ensures uniform tool engagement and stable average chip thickness. The tool experiences constant load, causing uniform wear and predictable tool life. The small thickness of sliced material significantly reduces heat impact on the tool and ensures an increase in the number of tool teeth. This method results in a very high metal removal rate with considerably decreased power consumption and improved tool life.
  • What is a "trochoid"?
    "Trochoid", or "trochoidal curve", is a general name for a curve described by a fixed point on a circle as it rolls along a straight line or curves without slipping.
  • What is the secret of CHATTERFREE geometry?
    CHATTERFREE represents a design utilized in several ISCAR solid carbide endmill families. The main CHATTERFREE features are unequal angular pitch of cutter teeth and variable helix angle. This concept results in substantially reducing or even eliminating vibrations during cutting, which significantly improves performance and tool life.
  • What is a variable helix?
    The term "variable helix" refers to the helix angle in vibration-free designs of solid carbide endmills (SCEM), as are found in ISCAR CHATTERFREE products. A typical SCEM features helical teeth and the helix angle determines the cutting edge inclination of a tooth. In traditionally designed endmills, the helix angle is the same for all flutes, but it varies in vibration-free configurations.
    The term “variable helix” is commonly understood to represent two design features: 1) Combining flutes with unequal helix angles where the angles are constant along every flute.
    2) Helix angle varies along the flute.
    However, the term “variable helix” is correct only in relation to design feature 2 and the term “different helix” should be used to specify design feature 1.
  • Why are FINISHRED endmills often referred to as “Two in One”?
    FINISHRED endmills feature four flutes, two serrated teeth and two continuous teeth. This facilitates the integration of two cutting geometries into a single tool: rough (serrated teeth with chip splitting action) and finish (continuous teeth), so gaining the “two in one” appellation. By running at rough machining parameters, semi-finish or even finish surface quality can be achieved. One such tool can replace two rough and finish endmills, reducing cutting time and power consumption while increasing productivity.
  • Does ISCAR provide instructions for regrinding solid carbide endmills?
    Yes. All catalogues, as well as relevant technical leaflets and brochures, contain instructions for regrinding solid carbide endmills, and ISCAR local representatives are available to advise on this issue.
  • What is a length series?
    Solid carbide endmills of the same type and the same diameter often vary in overall length within a family. According to the length gradation, there are short, medium and long series. Additional series such as extra-short or extra-long can also be applied. As a general rule, short-length endmills ensure highest strength and rigidity whereas extra-long solid carbide endmills are intended for long-reach applications.
  • What is a slot drill?
    “Slot drill” is a name of an endmill that can cut straight down. Slot drills have at least one center cutting tooth and are used mainly to form key slots. Slot drills are typically two-flute mills, but they can have three and even four flutes.
  • ISCAR ball nose solid carbide endmills have two or four flutes (teeth). How should the correct number of flutes for a ball nose endmill be chosen?
    The all-purpose four flute ball nose solid carbide endmills provide a universal and robust production solution for various applications, especially for semi-finish and finish operations. Two flute endmills have a larger chip gullet, which makes them more suitable for rough machining as they ensure better chip evacuation. Two flute tools are also considered to be a workable method for fine finishing due to a lower accumulated error, which depends on the number of teeth. When milling with shallow depth of cut, calculating feed per tooth should take into consideration only 2 effective teeth; as the advantages of a multi-flute design are diminished.
  • Does the ISCAR solid carbide endmill line include miniature endmills?
    ISCAR solid carbide endmill lines include endmills with diameters of tenths of mm. For example, the standard ball nose endmills, which are intended for processing ribs for hard materials, start from a minimal diameter of 0.1 mm.
  • Does ISCAR produce solid ceramic endmills? Where is their application most effective?
    ISCAR's product range includes a family of solid ceramic endmills. They are mainly applied to machining high temperature superalloys, heat resistant stainless steel, cast iron and graphite.
  • What are the applications for ISCAR's lens- and oval-shape solid carbide endmills and MULTI-MASTER exchangeable heads? (Related to MULTI-MASTER - 466)
    The lens- and oval-shape solid carbide endmills and MULTI-MASTER exchangeable heads are designed for 5-axis semi-finish and finish milling complex surfaces, especially in aerospace, medical and die & mold industries.
  • Is it possible to regrind ISCAR's lens- and oval-shape solid carbide endmills?
    The lens- and oval-shape solid carbide endmills features a complicated cutting shape and therefore they are not intended for regrinding.
    MULTI-MASTER
  • How is a head mounted into a shank?
    A head has two surfaces: a short taper and a rear non-cutting face that determines the head location in a shank. The taper ensures high concentricity and the face – a face contact. The thread is intended for securing the head. Therefore the rear (tail) part of the head has two areas: tapered and threaded.
    During mounting, the head is initially rotated by hand and then is tightened by means of a key. The head has flats for applying a key.
  • What are the advantages of the face contact?
    First of all, the face contact considerably increases the stiffness of an assembled tool comprising a shank and a head and its ability to withstand impact loading so common in milling. This factor allows for stable cutting, minimizes vibrations, and reduces power consumption.
    Secondly, the face contact ensures high repeatability of the head overhang with respect to the shank. As a result, there is no need for an additional adjustment after replacing the head - no setup time – and an operator can change the head without removing the shank from a machine tool spindle.
  • What does “the initial gap” mean?
    When tightening a head, an operator starts by rotating the head by hand. The head then stops at some point and a small gap remains between the contact faces of the head and the shank. From this moment, further head tightening is possible only with the use of the key. Tightening of the head causes elastic deformation of the adjoining contact area of the shank section, in a radial direction. The above-mentioned gap is called "initial" and it is an important feature of the MULTI-MASTER connection. The gap value is several tenths of a millimeter, depending on the thread size.
  • Why does the MULTI-MASTER thread have a special profile?
    The MULTI-MASTER heads are produced from tungsten carbide. Although this is an extremely hard and heat-resistant material, it has lowered impact strength against, for example, high speed steel (HSS). Therefore, in designing a threaded tungsten carbide part, minimizing stress concentrators is one of the main problems to be solved.
    Additionally, the MULTI-MASTER thread connection has relatively small dimensions: the nominal diameters of the threads lay approximately within 4-15 mm. These sizes and the necessity to meet the strength requirements for the operational loads, can possibly limit the height of the thread profile.
    The above points make it problematic to use the standard threads and strongly dictate a special thread shape that will comply with specifications of the connection. That is why ISCAR designed the special-profile thread, which has been designated as “T-thread”.
  • What types of MULTI-MASTER heads does ISCAR offer?
    • End milling heads of various shapes – 90°, 45°, 60°, etc.
    • Profile milling heads having ball nose, toroidal, concave radii and other shapes
    • Heads for high-feed milling
    • Slot and groove milling heads for milling grooves for retaining or O-rings, T-slots, etc.
    • Thread milling heads
    • Center and spot drilling heads
    • Engraving heads
    The milling heads have various numbers of teeth (flutes), helix angles, and degrees of accuracy, as well as cutting geometry for effective machining of various engineering materials.
  • What is an economy-type end milling head?
    There are two types of MULTI-MASTER end milling heads.
    The first type of MULTI-MASTER end milling head is the same as the ISCAR standard solid carbide endmills but differs in overall and cutting edge lengths. A major advantage of this type of end milling heads is that there is a large variety to choose from (practically all the standard line of the solid mills). In finishing and milling hard materials, increasing the number of flutes makes cutting more stable and productive. The heads of the first type are produced from stepped cylindrical blanks by grinding.
    The second type of MULTI-MASTER end milling heads is the economy version; it is shaped beforehand by pressing and sintering with a small oversize. Further grinding defines the final shape of a head and its accuracy. The heads of this type have a high-strength tooth that makes it possible to substantially increase the feed per tooth in comparison with the heads of the first type. Pressing technology enables production of different complicated shapes; although making these from the stepped blanks is problematic. The economy-type heads have only two teeth.
  • Why do the MULTI-MASTER keys have two openings?
    Due to the design features of the heads, one of the openings, similar to openings of ordinary engineering wrenches, is intended for the multi-flute heads of the first type of MULTI-MASTER end milling head (see above) and the appropriate cylindrical blanks. The second shaped opening is designed for the economy-type heads.
  • กลุ่มผลิตภัณฑ์ MULTI-MASTER รวมถึงเครื่องมือสำหรับทำรูด้วยหรือไม่?
    กลุ่มผลิตภัณฑ์นี้ประกอบด้วยหัวที่มีมุมแหลม 60, 80, 90, 100, 120 และ 145 องศา ซึ่งไม่ได้มีไว้สำหรับการลบมุมเท่านั้น แต่สำหรับการเจาะเฉพาะจุดและการเคาเตอร์ซิงค์ ISCAR ขอเสนอหัวเจาะตรงกลางเพิ่มเติม
  • Is a center drilling head that is made from solid carbide, really a reasonable solution? There are various low-cost double-sided standard combined center drills and countersinks produced from HSS.
    When compared to the above-mentioned HSS combined drills and countersinks, the center drilling heads allow for a considerable increase in tool life. The heads are operated under higher cutting data and thus lead to higher productivity. Therefore, we advise checking the current production cost and then making a decision, taking all relevant factors into account.
  • What is the accuracy of the heads?
    The nominal diameter of the normal accuracy end milling heads has the following tolerance limits: e8 for multi-flute heads produced from blanks and h9 for the economy- type heads. The precise heads for finish profiling are made with tolerance limits for diameter h7 and the heads for milling aluminum – h6. The diametric tolerance for the cylindrical cutting area of the heads for chamfering, spot drilling and countersinking is h10.
  • What is the repeatability tolerance of MULTI-MASTER heads?
    As mentioned in the answer to question 2, one of the main advantages of the face contact is high repeatability, which ensures closed tolerance for the head overhang with respect to the contact face of a shank. The overhang limits are ±0.01 mm for the majority of the end milling heads.
  • Does ISCAR offer MULTI-MASTER heads intended for milling hardened steel?
    Yes. These heads are made from a high-strength and wear-resistant submicron carbide grade; and they have tight dimensional tolerances.
  • What are the main types of shanks and for which purpose should they be used?
    The shanks are available in different versions: smooth cylindrical and with a neck. The neck can be straight or conical.
    The smooth shanks and the shanks with a straight neck, called Type A shanks in MULTI-MASTER’s designation system, are general purpose shanks and are used for a variety of applications. There is also a reinforced version, intended mainly for milling keyways or high-feed milling (HFM). It is distinguished by flats on a shank body that make it suitable for clamping in Weldon-type adapters.
    Type B is a reinforced shank with a relatively short conical neck which has a taper angle of 5° on the side. It is characterized by increased strength of the durable body that defines its main application: heavy-duty machining.
    For long-reach machining at high overhang, the Type D shank with a long conical neck can offer a good solution. It has a taper angle of 1° on the side and is designed primarily for milling deep pockets and cavities, high steep walls, etc. This shank should not be used in heavy-load conditions.
    For short-reach applications, the MULTI-MASTER family offers shanks with a collet adaptation. These are mounted directly into a collet chuck instead of the spring collet. The direct mounting increases rigidity and accuracy, and reduces the overall overhang relative to the datum face of a machine tool spindle.
    The MULTI-MASTER family also includes smooth steel cylindrical shanks of considerable overall length (at least 10 diameters of the shank). These are intended primarily for producing specially tailored tools of various configurations by additional machining of the shanks in order to form the required shape. Such machining can be performed even directly by the customer. In fact, they are the blanks with an internal T-thread. For the convenience of additional machining operations (turning, sometimes external grinding, etc.), the shanks are provided with a center hole in the rear face.
    The MULTI-MASTER family contains a variety of extensions and reducers for connecting with other ISCAR systems of modular tooling (for example, FLEXFIT).
  • From what materials are the shanks made? How should the correct material be chosen?
    The shanks are produced from the following materials: steel, tungsten carbide and heavy metal (an alloy containing 90% and more of tungsten).
    In the context of functionality, a steel shank is the most versatile. Due to the considerable stiffness of tungsten carbide, a carbide shank is intended primarily for finishing and semi-finishing, machining at high overhang and milling internal circumferential grooves. In case of unstable cutting, applying a heavy metal shank can give good results because of the vibration-proof properties of heavy metal. However, heavy metal shanks are not recommended for heavy-duty machining.
  • Are the MULTI-MASTER tools suitable for coolant supply directly through the tool body?
    Yes, there is a design of the shanks with holes for internal coolant supply.
  • Can the MULTI-MASTER shanks be held in heat shrink chucks and collets?
    The carbide or heavy metal shanks are suitable for toolholding by the heat shrink method. As for the steel shanks, clamping them into heat shrink chucks and collets is not recommended.
  • Is it necessary to lubricate T-threads when mounting the heads into a shank?
    No. Do not apply lubricants to the MULTI-MASTER T-thread connection!
  • Are the MULTI-MASTER connection design and thread compatible with other tool brands?
    No. ISCAR’s unique design is patented and other systems that appeared later are not compatible.
  • Does ISCAR provide blank MULTI-MASTER heads that are intended for final forming by the customer?
    The MULTI-MASTER family includes semi-finished uncoated carbide blank heads, designed for manufacturing various special cutting profiles by additional grinding at customer facilities. The blank heads have a T-thread for MULTI-MASTER adaptation and a cylindrical portion intended for grinding by the customer.
  • Does ISCAR provide a key with adjustable tightening torque for MULTI-MASTER heads?
    Yes. The MULTI-MASTER product range includes an assembled key, comprising an adjustable torque handle with a set of interchangeable wrenches and TORX-tipped bits, designed for secure and accurate tightening of MULTI-MASTER heads. This key is an optional product and should be ordered separately.
  • What are the applications for ISCAR's lens- and oval-shape solid carbide endmills and MULTI-MASTER exchangeable heads?
    The lens- and oval-shape solid carbide endmills and MULTI-MASTER exchangeable heads are designed for 5-axis semi-finish and finish milling complex surfaces, especially in aerospace, medical and die & mold industries.
  • What is the maximum rotational velocity for a MULTI-MASTER milling tool?
    A MULTI-MASTER tool is an assembly comprising of a shank and an exchangeable milling head. The maximum rotational velocity values (in rpm) for each shank can be found in ISCAR’s catalogs and guides. To estimate the maximum rotational velocity for an assembly when a specific milling head is attached to a shank, the maximum rpm value (taken from the catalog) should be divided by the number of flutes of the milling head.
    Apart from keeping the maximum rotational velocity restriction, the entire tool assembly (milling head, shank, and adapter/tool holder) must be properly balanced.
  • Which of the MULTI-MASTER milling heads are considered long-flute?
    Usually, these are the heads where the length of a cutting edge is at least half as much as the head diameter.
  • มีด Multi-Master MM HCD มีหลายแบบสำหรับงานลบมุม เคาเตอร์ซิงค์ และการเจาะเฉพาะจุดที่มีมุมต่างกัน อะไรคือสาเหตุของความหลากหลายนี้?
    กลุ่มผลิตภัณฑ์มาตรฐาน Multi-Master หัว MM HCD มีมุม 60, 80, 90, 100 และ 120 องศา ความหลากหลายดังกล่าวส่วนใหญ่เกี่ยวข้องกับข้อกำหนดของมาตรฐานต่าง ๆ สำหรับการลบมุมและเคาเตอร์ซิงค์สำหรับจับยึด ตัวอย่างเช่น สกรูเคาเตอร์ซิงค์แบบเมตริกต้องใช้เคาเตอร์ซิงค์ 90 องศา แต่สกรูเคาเตอร์ซิงค์ของ American National ต้องใช้ 80 องศา และหมุดย้ำด้านการบินและอากาศยานใช้ 100 องศา การลบมุมทั่วไปมีมุมลบมุม 45 องศา แม้ว่าการลบมุม 30 องศา และ 60 องศา ก็เป็นเรื่องปกติเช่นกัน โปรไฟล์ที่สร้างขึ้นหลายรูปแบบที่จำเป็นนี้กำหนดความสามารถในการทำงานของส่วนหัวและอธิบายความหลากหลาย
  • ขอบเขตการใช้งานหลักสำหรับมีดเจาะก้นแบนแบบถอดเปลี่ยนได้ของ ISCAR MULTI-MASTER คืออะไร?
    ช่วงการใช้งานของหัวเหล่านี้ไม่จำกัดเฉพาะการทำรูที่ค่อนข้างสั้นโดยให้ก้นแบนราบ (ในเชิงลึกถึง 1.2 ของเส้นผ่านศูนย์กลางรู) หัวเจาะก้นแบนแบบถอดเปลี่ยนได้ MULTI-MASTER ช่วยให้มั่นใจได้ถึงการเจาะที่มีประสิทธิภาพบนพื้นผิวเอียงและพื้นผิวโค้ง บนวัสดุแข็งโดยตรงโดยไม่ต้องเจาะกึ่งกลางหรือเจาะนำร่อง ทำให้สามารถผลิตรูครึ่งรู เจาะคว้าน และปาดผิวเฉพาะจุดได้
  • จำเป็นต้องลดอัตราป้อนเมื่อเจาะพื้นผิวลาดเอียงด้วยมีดเจาะก้นแบนแบบถอดเปลี่ยนได้ MULTI-MASTER หรือไม่?
    ใช่. เมื่อเจาะพื้นผิวเอียง ควรปรับอัตราป้อนตามมุมเอียงของพื้นผิวตามที่แนะนำในคู่มือ ISCAR ที่เกี่ยวข้อง สามารถประมาณได้คร่าวๆ ว่าการลดอัตราป้อนงานจะอยู่ที่ 30-50% ของค่าทั่วไป ขึ้นอยู่กับมุมเอียง
  • ISCAR ผลิตเครื่องมือ MULTI-MASTER สำหรับการติดตั้งโดยตรงบนสปินเดิลของเครื่องจักรหรือไม่?
    ใช่ ISCAR ผลิตเครื่องมือ MULTI-MASTER ที่มีด้ามเรียวสำหรับติดตั้งในสปินเดิลที่มีการดัดแปลงต่าง ๆ ตัวอย่างเช่น 7:24 เทเปอร์ (DIN 69871), HSK เทเปอร์ (DIN 69893), เทเปอร์เหลี่ยม (ISO 26623-1) เป็นต้น
    Fast Feed Milling
  • For which type of fast feed milling cutters does ISCAR manufacture tools?
    ISCAR’s line of fast feed milling cutters comprises tools carrying indexable inserts, Multi-Master tools and solid carbide end mills.
  • Which milling operation is more effective for applying FF milling cutters?
    The most effective applications for FF milling cutters are rough milling planes, pockets and cavities.
  • What is the meaning of the “Triple F” or "FFF" that is often mentioned in ISCAR technical editions and presentations?
    "FFF" refers to fast feed face milling or fast feed facing. Rough milling planes is one of most the efficient and widespread applications for FF cutters. The operation usually relates to face milling, so the FFF acronym refers usually to fast feed face milling. FFF can also mean fast feed facing, as milling plane operations are often known as facing.
  • Fast feed milling is considered as a high-efficiency metal removal technique when machined workpieces are made from steel or cast iron. Can FF milling cutters be applied to machining difficult-to-cut materials like titanium or high temperature alloys?
    FF milling cutters may be used in machining difficult-to-cut materials. The cutting geometry in this case differs from the geometry of general-duty FF milling tools that are intended for steel and cast iron. In addition, feed per tooth is significantly smaller compared to machining steel and cast iron; however it is much higher than the feed values that are recommended for traditional methods.
  • What are MF milling tools?
    MF means “moderate feed”: moderate comparing with “fast” in FF milling but faster than the standard in traditional milling. The MF method is intended for increasing productivity when using slow high-power machines, milling heavy workpieces, etc.
  • The LOGIQ campaign introduced new families of indexable FF milling cutters with a diameter range typically covered by solid carbide endmills. Can these new cutters successfully compete with the solid carbide design concept?
    Yes. The design of the cutters ensures a multi-teeth tool configuration. Let’s consider the NAN3FEED mill family as an example. They have 2 and 3 teeth for nominal diameters 8 and 10 mm (.315 and .394”) correspondingly. In a cutter carrying replaceable inserts, only the insert - a small part of the cutter - is made from cemented carbide. This means that the indexable design consumes far less of this expensive material than a solid carbide solution. The NAN3FEED insert with its 3 cutting edges ensures triple edge indexing, which is also cost-effectiveness. As the insert is small, it is placed simply in a pocket via a key with a magnetic boss on the key handle. The economical efficiency and ease of use make the family competitive with solid carbide tools.
  • Are fast feed cutters recommended for milling operations in turning or multi-task machines?
    Yes. In general, these are small to medium diameter cutters and the turning operation is fast. The use of fast feed cutters results in improving the milling operation, reducing the machining time and minimizing damages to the machine head. MULTI-MASTER is an excellent option for turn-milling machines.
  • What is a radius for programming in fast feed milling cutters?
    In CNC programming, a fast feed cutter is often specified as a 90°mill with a corner radius. This imaginary radius, which is called as "radius for programming", is an important data because it defines the maximal thickness of a cusp (scallop) and deviations from the theoretical profile of a surface that is generated by such a specification.
  • ISCAR มีหัวกัดอัตราป้อนสูง (อัตราป้อนเร็ว) ที่หลากหลาย ฉันจะเลือกหัวกัดที่เหมาะสมที่สุดสำหรับการใช้งานของฉันได้อย่างไร?
    ข้อมูลพื้นฐานเกี่ยวกับมีดกัดอัตราป้อนสูง (อัตราป้อนเร็ว) ของ ISCAR และคำแนะนำสำหรับการเลือก สามารถดูได้ในคู่มือการเลือกเครื่องมือด่วนสำหรับการกัดอัตราป้อนเร็ว มีทั้งแบบอิเล็กทรอนิกส์ (เว็บไซต์ ISCAR) และฉบับพิมพ์ หากคำถามอ้างถึงแอปพลิเคชั่นเฉพาะที่มีรายละเอียดที่ทราบ โซลูชันที่เหมาะสมที่สุดสามารถพบได้ในแอปพลิเคชั่นซอฟต์แวร์ออนไลน์ของ ITA (Iscar Tool Advisor)
  • Can fast feed milling be applied to machining hardened steel and cast iron?
    Yes, fast feed milling can be successfully used for rough machining of steel and cast iron with high hardness, particularly when reshaping repaired surfaces of dies and molds after filler welding and post-weld treatment.
    High Speed Machining (HSM)
  • What does the term "high speed machining" mean?
    Often HSM is emphasized as "a high-efficiency method of modern machining with high spindle and feed speed". High speed machining may refer to:
    • High cutting speed machining
    • High spindle speed machining
    • High feed speed machining
    These three speeds are interrelated. Increasing spindle speed automatically results in increasing feed speed as well, and likewise higher cutting speed requires a correspondingly higher spindle speed. As cutting speed varies in direct proportion to the diameter of a rotating tool, for tools of different diameters, different spindle speeds are required to ensure that the cutting speed is identical. A cutting speed is also a function of several factors, where a workpiece material and a cutting tool material are dominant. Depending on the cutting tool material, the recommended cutting speed for the same workpiece material may be quite different. A good example of this is machining nickel-base high temperature alloys by cemented carbide and whisker ceramic tools. At the same time, in machining aluminum, for instance, "normal" cutting speeds are significantly higher than in machining the high-temperature alloys.
    The term "high speed machining" usually relates to high speed milling, which is a milling method that is characterized by shallow, light cuts combined with high spindle speed.
  • Is the cutting speed extremely high in high speed machining?
    Not always. Let's examine one example. Assume that we machine a material with the use of a ball nose milling cutter of 4 mm in diameter while the depth of cut is 0.1 mm. The effective diameter in this case will be 1.25 mm. If the cutting speed as 60 m/min is required, the cutter should rotate at 15280 rpm. If the cutting speed will be 100 m/min, the rotational speed of the cutter will increase up to 25465 rpm! High speed machining does not automatically mean that the cutting speed is high.
  • Is it correct that a machine tool intended for high speed machining must have a high speed main drive?
    Yes, but not only. As rotational speeds and feed speeds are interrelated, the machine tool should also feature a high speed feed drive. Furthermore, the machine tool must have appropriate fast control systems, high rigidity and many other design features, to make it suitable for high speed machining.
  • Can high speed machining be applied to machining hard steel?
    Yes. In machining hard steel – which are difficult-to-cut materials – intensive heat generation and vibration take place. This is a source of poor tool life, reduction of accuracy, loss of stability etc. that makes machining operations unpredictable. High speed machining with its shallow cuts produces much lower cutting forces and heat, and therefore can solve these issues.
  • Why is high speed machining becoming more and more popular in rough machining operations?
    Technological advances, especially in producing workpieces that are half-finished products, place special emphasis on high speed machining. Methods such as precise casting, metal injection molding, and 3D printing ensure that the production of workpieces is very close to the final shape of a part. As a result, the need to remove a high volume of materials by means of traditional rough cutting decreases. As high speed machining features low stock removal, it offers a precise method of producing workpieces.
  • How does trochoidal milling relate to high speed machining?
    In trochoidal milling, a fast-rotating tool moves along an arc and “slices” a thin but wide layer of material. This milling method features small widths (or radial depths) of cut and high speed rotation of the tool and may be considered as a high speed machining technique.
  • Does ISCAR provide information about maximum rotational velocities for milling cutters?
    Yes. This information can be found in catalogues, guides, leaflets and other technical documentations. In many cases, the maximum rotational velocity permitted for indexable milling cutters is marked directly on a cutter body.
  • เครื่องมือตัดเฉือนความเร็วสูง (HSM) และชุดจับยึดเครื่องมือควรมีความสมดุลหรือไม่?
    คำตอบคือใช่ โดยทั่วไปแล้ว เครื่องมือจะติดตั้งอยู่บนตัวจับยึดเครื่องมือ และตัวจับยึดเครื่องมือจะติดตั้งเข้ากับสปินเดิล ของเครื่องจักรความเร็วสูง ในการกัดด้วยความเร็วสูง ไม่สามารถแยกคุณลักษณะไดนามิกของเครื่องมือออกจากตัวจับยึดเครื่องมือได้ และต้องให้ความสำคัญเป็นพิเศษกับการประกอบเครื่องมือและตัวจับยึดเครื่องมือ
  • อะไรคือการกัดปอก ?
    โดยทั่วไป การกัดปอกจะสัมพันธ์กับวิธีการกัดโดยพิจารณาจากการผสมผสานระหว่างระยะกินลึกขนาดใหญ่ที่มีการประสานในแนวรัศมีขนาดเล็กของมีดกัด การกัดแบบโทรคอยด์ถือได้ว่าเป็นส่วนหนึ่งของกระบวนการกัดปอก และมักใช้ทั้งการกัดปอกและการกัดโทรคอยด์
    Milling Slots and Grooves
  • Which tools are used for milling slots?
    Generally speaking, milling tools of different types – side milling cutters, endmills, extended flite (long-edge) milling cutters and even face mills – are suitable for milling slots and grooves. However, only the side milling cutters with teeth on face and periphery are designed especially for machining slots and grooves, while the others are intended for various milling operations. ISCAR’s line of slot milling tools comprises the side milling cutters.
  • What is the difference between “slot” and “groove”?
    The words “slot” and “groove” are often synonymous. But if “slot” usually relates to a narrow, comparatively long, mainly longitudinal opening that is usually open-ended (at least from one side); “groove”, as a rule, means a circular (called “undercut”) or helical channel. It is been said that “a slot is an open-ended groove”.
  • Slot milling tools are often referenced as slotting tools. Is this correct?
    The word “slotting”, commonly known as “slot milling”, is widespread in shop talk but the two actions are not identical or interchangeable. Slotting refers specifically to a stage in planning or shaping – a machining process where a single-point cutting tool moves linearly and piston wise, and a workpiece is fixed or moves only linearly concurrent with the tool.
  • Why are slot milling cutters called side and face milling cutters?
    A slot milling cutter has teeth on its face and periphery, and features a cutting face and sides for the simultaneous machining of three surfaces: the bottom and the two sidewalls of a slot.
  • What are the main types of slot milling cutters?
    The slot milling cutters differ in their adaptation (mounting methods). They have either arbor hole or shank-type configurations or, alternatively, interchangeable cutting heads for modularly assembled tools.
  • What is ISCAR’s program for slot milling cutters?
    ISCAR is engaged in developing slot milling cutters in various fields:
    - Cutters carrying indexable inserts
    - Assembled MULTI-MASTER slot milling tools with replaceable heads
    - Assembled T-SLOT milling cutters with replaceable solid carbide cutting heads
  • Which slot is defined as narrow?
    The term “narrow slot” generally defines a deep slot of small width. A more rigorous but empirical rule considers a “narrow slot” to be the slot with a width less than 5 mm and a depth of at least 2.5 times the width.
  • What type of milling does ISCAR recommend for these types of cutters?
    Down milling is normally recommended, where chip thickness is formed from thick to thin.
  • What is the difference between indexable slotting cutters and slitting cutters?
    Originally, slotting cutters were intended for milling slots and grooves while slitting cutters were used for slitting or cutting-off. Each type of cutters featured different accuracy requirements, and slitting cutters were less precise. However, technological progress has significantly leveled out differences between slotting and slitting cutters in indexable milling.
  • Why are the terms "axial depth of cut" and "radial depth of cut" very common in milling slots and grooves?
    In milling, a depth of cut is usually measured along the axis of a cutter, axially, while a width of cut – radially, in the direction perpendicular to the axis. Hence the depth of cut and the width of cut also can refer to as "axial depth of cut" and "radial depth of cut" accordingly.
    However, this generally accepted approach may sometimes lead to confusion in the case of disc slot milling cutters. The axial depth of cut here is equal to the width of cutter teeth, and it defines the width of a milled slot. The radial depth of cut in the such a case reflects the slot depth.
    Therefore, in machining disc milling cutters, using the terms "axial depth of cut" and "radial depth of cut" helps in preventing possible misunderstandings.
  • หัวกัดร่องคาร์ไบด์ ISCAR SD-SP สามารถติดตั้งบนด้าม MULTI-MASTER ได้หรือไม่?
    ไม่, มีดกัดร่อง SD-SP แบบถอดเปลี่ยนได้ไม่เหมาะสำหรับการติดตั้งโดยตรงบนด้าม MULTI-MASTER อย่างไรก็ตาม สามารถติดตั้งได้เมื่อใช้อะแดปเตอร์ SD CAB one-end T-threaded และ one-end splined adapter
    Extended Flute Cutters
  • Why “extended flute” cutters?
    The cutting blade of an extended flute cutter consists of a set of indexable inserts that are placed gradually with a mutual offset of one another. Compared to an ordinary indexable mill whose length of cut is limited by the cutting edge of its insert, the cutting length of the extended flute cutter is significantly larger – it is “extended” due to the set of inserts.
  • What are the other technical terms for extended flute cutters?
    Extended flute cutters are also referred to as long-edge cutters and porcupine cutters (known as “porkies” in shop talk).
  • What are the main applications for extended flute cutters?
    Extended flute cutters are designed for high-performance rough milling: milling deep shoulders (known as “deep shouldering” in shoptalk), deep pockets and cavities (“pocketing”), and wide edges (“edging”).
  • Can extended flute cutters be applied to semi-finish operations?
    Yes. There are solutions that ensure this type of machining. For example, ISCAR HELITANG FIN LNK cutters carrying tangentially clamped peripherally ground inserts were designed especially for semi-finish milling.
  • Why do many types of indexable inserts for extended flute cutters feature a chip splitting design?
    Extended flute cutters work in heavy-load conditions. The following factors considerably improve cutter performance, which is why a chip splitting geometry is often integrated into the extended flute cutters’ design:
    • Chip splitting results in a wide chip being divided into small segments, which improves chip evacuation and chip handling.
    • The action of chip splitting strengthens vibration dampening of a cutter.
    • In many cases, chip splitting reduces cutting forces and power consumption, and leads to less heat generation during milling.
    • The small segments have fewer tendencies to be re-cut; this greatly improves rough milling of deep cavities and increases tool life.
  • What are the design configurations of ISCAR’s extended flute cutters?
    The ISCAR standard line of extended flute cutters comprises various designs:
    • Shell mills
    • Mills with cylindrical shanks (smooth or with flats, known as “Weldon-type”)
    • Mills with tapered shanks (7:24, HSK)
    • CAMFIX polygonal taper shank and replaceable cutting heads with a FLEXFIT connection
  • Can ISCAR’s extended flute cutters incorporate internal coolant supply channels?
    Most of ISCAR’s extended flute cutters have an internal channel for coolant supply through the body of the cutter.
  • Does ISCAR recommend extended flute cutters for milling titanium?
    Yes. Milling titanium usually involves removing considerable machining stock. It is a process with a significant buy-to-fly ratio and a large amount of metal needs to be removed. Extended flute cutters possess significant performance advantages in this area and their use can dramatically cut cycle time.
  • Why are some extended flute cutters defined as ‘fully effective’?
    The design of the cutters known as ‘fully effective’ features the inserts interlinked and overlapping, resulting in a continuous flute. Many other cutters are “half effective”, where the inserts are placed alternately and 2 flutes are necessary to cover the area that the fully effective cutters can cover with only one flute.
    Milling Gears and Splines
  • Does ISCAR provide tools for milling gears and splines?
    ISCAR’s current tool program, for milling spur gears with straight teeth and splines, has been developed to include three types of cutter:
    • cutters with indexable inserts
    • cutters with replaceable cutting heads based on the T-SLOT concept
    • cutters with replaceable MULTI-MASTER cutting heads
  • For which method of generating teeth are ISCAR’s milling tools intended?
    Form milling and power skiving.
  • When talking about generating a tooth profile, what is meant by “form milling”?
    Form milling is one of the methods for generating tooth profiles. In form milling, a milling cutter with a working shape like the contour of a tooth space, machines every tooth individually; and a workpiece is indexed through a pitch after generating one space.
  • Are there other methods of generating tooth profiles, apart from form milling?
    The principal methods (in addition to form milling) include gear hobbing, which uses a hob, a cutter with a set of teeth along a helix that mills the workpiece and that rotates together with the workpiece in a similar way to a worm-wheel drive; gear shaping with the use of a gear-shaping cutter, a rotating tool that visually resembles a mill; and by power skiving - a technique that combines gear milling and gear shaping. There are also other methods of generating teeth profiles, such as gear broaching, gear grinding, and gear rolling.
  • Is milling gear teeth the final operation of a gear-making process?
    In general, milling gear teeth is not the final operation in the gear-making process. After this operation, it is necessary to remove burrs and then the sharp edges of the teeth should be rounded or chamfered, for better engagement. Gear rounding, and gear chamfering operations are necessary to avoid quenching gears with sharp edges, which may cause various micro cracks that affect gear life. In addition, milling teeth ensures parameters that feature only gears of relatively low accuracy. As manufacturing precise gears demands tougher characteristics of accuracy and surface finish, other processes such as gear shaving, gear grinding, gear honing, etc., are also applied.
  • Usually, form gear milling relates mainly to individual and low-batch production. Why do manufacturers of general-purpose cutting tools, including ISCAR, include form gear milling cutters in their program for standard lines?
    With batch manufacturing, milling gear teeth is made on specific gear hobbing machines as gear hobbing productivity is substantially higher. However, advanced multifunctional machine tools increasingly widen the range of machining operations that can be performed. Technological processes developed for these machines are oriented to maximize machining operation for one-setup manufacturing, creating a new source for more accurate and productive manufacturing. Milling gears and splines is one of the operations suitable for performing on the new machines.
    These new machines require appropriate tooling and manufacturers of general-purpose cutting tools are reconsidering the role of gear-milling cutters in their programs for standard product lines.
  • What is the module in gearing?
    The module (modulus) is one of the main basic parameters of a gear in metric system. It is measured in mm. The module m of a gear with pitch diameter d and number of teeth z is the ratio of the pitch diameter to the number of teeth (d/z).
  • Does the inch (Imperial) system of gearing also use the module as a basic parameter in gearing?
    The inch (Imperial) system operates another basic parameter: the diametral pitch. This is the number of gear teeth per one inch of the pitch diameter. If a gear has N teeth and it features pitch diameter D (in inches), diametral pitch P is calculated as N/D. Sometimes, when specifying gears in inch units, the so-called English module is used. In principle, this module has the same meaning as the module in the metric system, e.g. the ratio of the pitch diameter and the number of teeth; however, the pitch diameter should be taken in inches and not in millimeters like in the metric system.
  • What is the difference between gear and splines?
    Gears in a gear train are intended for transmitting rotational movement between 2 shafts (while the axes of the shafts are not always parallel) and, in most cases, this transmission is combined with changing torque and rotational speed. The gears are used also for transforming rotational movement into linear movement. A splined joint is a demounted connection of two parts to transfer the torque from one to another. The torque is not changed here.
  • What is the difference between splines and serrations?
    Within this context, serrations represent a type of spline. The serrations feature V-shaped space between teeth. They are commonly used in small-size connections.
    Grooving
  • What is the first choice for Heavy Duty Grooving?
    • For Groove Only applications, use the DOVEIQGRIP TIGER insert that comes in widths of 10 - 20 mm
    • For Groove-Turn applications, use the SUMO-GRIP TAGB insert that comes in widths of 6 - 14 mm
  • What is the best chip former to machine ductile/gummy materials?
    Use the "N" chip former. It is offered in 3 - 8 mm widths for external GIMN inserts and 2 -5 mm widths for internal GEMI/GINI inserts.
  • What are the recommended grades to use on ISO-M / ISO-P materials?
    • The first choice for many applications is IC808
    • If you need a harder grade with more wear resistance use IC807
    • If you need a tougher grade with more impact resistance (Interrupted cuts) use IC830
  • What is the best grade to machine ISO-S (high temperature alloys)?
    • Use IC806 is to machine high temperature alloys as your first choice.
    • For harder ISO-S materials (HRC>35) use IC804
  • What grooving tool-holders should I use on Swiss-Type machines?
    Use our unique Side-Lock GEHSR/GHSR tools, which provide both front and back access that is much easier for Swiss-Type machines (as opposed to the conventional top clamping).
  • What are the most recommended grades/geometries for grooving/groove-turning cast iron?
    Use the TGMA/GIA inserts that feature a K-Land combined with grades IC5010 or IC428
  • What are the most recommended grades/geometries for grooving/groove-turning aluminum?
    • Use the GIPA/GIDA/FSPA inserts that feature a very sharp and positive cutting edge and a polished top rake combined with IC20 carbide grade or ID5 PCD
    • For widths of 6 – 8 mm, FSPA round inserts are the best choice due to their superior clamping method
  • What tools/inserts should I use for internal grooving in small diameter bores?
    • Bore diameter 2 – 10 mm: use PICCO inserts on PICCO ACE tools
    • Bore diameter 8 – 20 mm: use GIQR inserts on MGCH tools
    • Bore diameter 12 – 25 mm: use GEMI/GEPI inserts on GEHIR tools
  • How can I reduce vibrations?
    • Use the minimum possible overhang
    • Work with constant RPM
    • Reduce the RPM if needed
    • Reduce the insert width in order to decrease the cutting force
    • For widths of 6 and 8 mm, use WHISPERLINE Anti-Vibration blades
  • In what cases do you recommend the use of JETCUT tools with internal coolant?
    JETCUT tools are recommended for all coolant pressure levels (10 – 340 Bar) and all applications, as they deliver a repetitive and reliable coolant supply directly to the cutting edge at the exact point where it is needed, improving tool life and chip control
  • ISCAR มีมีดฟอร์ม PENTA ทรงดาวสำหรับการทำรูปทรงขั้นสุดท้ายใช่หรือไม่
    ใช่ กลุ่มสินค้าเซาะร่องของ ISCAR จะรวมไปถึงมีดฟอร์ม เพื่อให้ปรับแต่งสินค้าสำหรับการขึ้นรูปตามสั่งได้
    Parting
  • What are ISCAR’s priorities for PARTING OFF?
    • For general applications up to 38mm part diameter, use DO-GRIP style double-ended inserts
    • Above 38mm: Use TANG GRIP style –single ended insert
    • Up to 40mm diameter: Use PENTA IQ , a highly economical insert with 5 cutting edges
  • What is the best grade for machining steel (ISO P)?
    • IC808/908
    What is the best grade for machining stainless steel (ISO M)?
    • C830/5400
  • What is the best insert geometry / chipformer for machining steel?
    • Use "C" geometry, for example DGN 3102C
    What is the best insert geometry / chipformer for machining stainless steel?
    • Use "J" geometry, for example DGN 3102J
  • What are the most recommended tools and inserts for machining miniature parts?
    • First choice is ISCAR DO-GRIP style (double-ended inserts) which has positive geometry, for example DGN 3102J & DGN 3000P
      * Use tools with Short Head dimensions, for example DGTR 12B-1.4D24SH
    • Second choice is to use ISCAR PENTA CUT, an economical insert with 5 cutting edges, for example :
      * PENTA 24N200J020 IC1008 (insert)
      * PCHR 12-24 (tool)
  • What is the best tool for heavy duty applications?
    • Use ISCAR TANG GRIP (single ended) insert – choose width according to part diameter
    • For heavy duty applications ISCAR offers 5-12.7mm insert widths
    • IC830 is the most suitable grade
    • Recommended insert geometry /chipformer is "C" type
  • How to reduce the bur on the part?
    • Use an R or L style of insert - these inserts have a lead angle, so the cutting edge is not straight
    • Also use a positive cutting rake, for example: DGR -3102J-6D (6D =6 degrees lead angle)
    • It is highly recommended to reduce the feed by 50% at the final cut
  • How to improve insert lifespan?
    Analyze the failure phenomena and choose grade accordingly:
    Wear: use a harder grade such as IC808 or 807
    Breakages: choose a harder grade such as IC830
  • Which is the best insert for an interrupted cut?
    Use a negative cutting rake, "C" chipformer and IC830 grade
  • How to improve chip control when long chips appear?
    • Select the correct chipformer and cutting parameters in order to obtain good chip formation
    • Choose a more aggressive chipformer
    • To increase feed, please refer to ISCAR user guide
  • How to improve part straightness and surface?
    • Use neutral insert and a stable tool with the minimum overhang needed
    • Adjust the cutting parameters
  • เครื่องมือจับยึด JETCROWN สามารถจับยึดอะแดปเตอร์ที่แตกต่างได้ไหม?
    ได้ เครื่องมือจับยึด JETCROWN มีไว้สำหรับติดตั้งอะแดปเตอร์สี่เหลี่ยมที่มีขนาดต่างกัน อะแดปเตอร์ยึดเข้ากับบล็อกโดยใช้ยอดล็อคซึ่งเป็นชิ้นส่วนที่ออกแบบมาเป็นพิเศษของชุดเครื่องมือ JETCROWN ซึ่งรับประกันการจ่ายสารหล่อเย็นแรงดันสูงอย่างแม่นยำ สิ่งสำคัญที่ควรทราบสำหรับความกว้างของเม็ดมีดแต่ละอัน จะต้องแยกยอดล็อค โปรดดูแคตตาล็อกและคำแนะนำทางเทคนิคของ ISCAR สำหรับข้อมูลเพิ่มเติม
  • เหตุใด ISCAR จึงแนะนำบล็อกเครื่องมือใหม่ที่มีแผ่นเสริมด้ามตรงข้ามของบล็อก นอกเหนือจากกลุ่มเครื่องมือที่มีอยู่ในกลุ่มผลิตภัณฑ์ LOGIQ-F-GRIP?
    มีหลายกรณีที่ซี่โครงเสริมแรงขัดขวางและกีดกันการจับยึดบล็อก ISCAR LOGIQ-F-GRIP ในตำแหน่งป้อมปืนทั่วไป ปัญหาดังกล่าวสามารถแก้ไขได้โดยใช้บล็อกที่มีโครงอยู่ด้านตรงข้าม ในกรณีเหล่านี้ ISCAR ได้เพิ่มบล็อกที่มีตำแหน่งโครงอื่นไปยังกลุ่มผลิตภัณฑ์ LOGIQ-F-GRIP
    Drilling
  • What is the recommended coolant flow rate?
    Depends on diameter. For example, the minimal flow rate for 6 mm SUMOCHAM is 5 liters per minute. For 20 mm, the minimal flow rate require is 18 liters per minute. For more information, please refer to SUMOCHAM user guide in our catalogue, page 491.
  • What is the recommended coolant pressure?
    Depends on diameter and tool length. For example, the minimal pressure for 6 mm SUMOCHAM on 8xD is 12 bar. For 25 mm SUMOCHAM on 12xD, the minimal pressure required is 4.5 bar. For more information, please refer to SUMOCHAM user guide in our catalogue, page 491.
  • What straightness can be achieved with the SUMOCHAM line?
    With a stable set-up, deviation may vary from 0.03 mm to 0.05 mm for each 100 mm of drilling depth. Important: Achieved results may vary due to machine, fixture, adaptation, etc.
  • What is the correct deep drilling cycle with the pre-hole and the next tool?
    In order to avoid mistakes, it is best to prepare the pre-hole with the same geometry that you intend to use for the subsequent deep drilling operation. For a more detailed explanation, please refer to our catalogue, page 492.
  • Is it possible to make boring operation with SUMOCHAM?
    No, the SUMOCHAM family is not designed for boring operations. Failure of the tool and insert may occur.
  • What is the recommended geometry for titanium?
    The first choice is ICG. The second choice is ICP.
  • Is it possible to regrind SUMOCHAM heads?
    Yes, ICP/ICK/ICM/ICN geometries can be reground up to three times. Please see a detailed explanation on pages 502-504 in our catalogue. Note: FCP/HCP/ICG/ICH geometries can be reground only at TEFEN.
  • What is the maximum permitted run-out for SUMOCHAM?
    To achieve best performance and tool life, radial and axial run-out should not exceed 0.02 mm. A detailed user guide can be found in our catalogue, starting on page 490.
  • Is it possible to use SUMOCHAM for interrupted cut operations?
    SUMOCHAM cannot withstand interrupted cut operations. Loss of clamping force of the tool may happen, eventually leading to falling out of the insert.
  • What solution does ISCAR recommend for hard materials?
    For hard materials we recommend our SCD-AH solid carbide drills made from IC903 grade, or a semi-standard option for SUMOCHAM line, the ICH heads.
  • What type of adapter is recommended?
    The recommended adapter is the one that is most suited for the tool's shank. For example, if the shank is round, the most accurate adapter would be of the HYDRO type. Please refer to page 829 in our catalogue.
  • What should be the maximum exit be for the SUMOCHAM exit hole?
    The exit for the materials should not be more than 2-3 mm less than the diameter edge of the insert.
  • What is your recommended solution for aluminum machining?
    Answer: Depends on the application. SUMOCHAM line has ICN inserts, which offer a dedicated solution for rilling non-ferrous materials.
  • What are the criteria to look for to indicate when SUMOCHAM heads are worn out?
    It is best to measure wear on a microscope. Additional indicators for wear are illustrated on page 493 in our catalogue.
  • Which hole is considered as "short" and which as "deep"?
    Commonly used terms “short” and “deep” holes do not have a strict definition. It is widely accepted that drilling a hole of diameter d and (10…12)×d or higher in depth relates to deep drilling, while holes having depth up to 5×d, are short.
    In the terminology used by ISCAR, only a drilling depth of 12×d and higher is considered as deep. Consequently, the holes with shallower depths are short.
  • What is a cutting length series of drills?
    The drills vary in their cutting length. In general, tool manufacturers normalize the drills by cutting length series (short, regular, etc.), according to the ratio "cutting length/drill diameter". At ISCAR, drills intended for machining short holes are usually divided into the following length series: short (up to 3×d), long (4×d and 5×d) and extra-long (8×d and 12×d).
  • Why is a center drill referred to as a "countersink" and even as a "spot drill"?
    A center drill is needed for forming a conical hole in workpieces. This hole is used for supporting the workpieces by the centers of machine tools. One of the methods for forming conical holes is countersinking - machining by a specially designed cutter, a countersink. In fact, the center drill performs a combination of two operations simultaneously: drilling and countersinking. Therefore, the center drill is often referenced as a “combined countersink”. Sometimes, a center drill is considered a spot drill; however this specification is not strictly correct. A spot drill only drills but a center drill performs two operations: drilling and countersinking, therefore “spot a hole” and “drill a center hole” are not the same.
  • In center drilling, does a Multi-Master replaceable solid carbide head offer a real alternative to reversible high-speed steel (HSS) drill bits?
    Reversible HSS center drill bits are the most popular tools for center drilling: they are simple, always available for purchase, and feature low prices. The Multi-Master replaceable solid carbide head enables significant increases in cutting speed and feed, resulting in higher productivity and reduced machining costs, especially in cases of machining difficult-to-cut material. In addition, the tool life of the head is much longer. A brief economical calculation will show the preferred alternative for each case.
  • Is a chip-splitting cutting geometry suitable for drills of a relatively small diameter?
    A chip-splitting cutting geometry may be used in drilling tools. There are different drill cutting edge designs with chip splitting grooves, for example the SUMOCHAM ICG heads. Splitting chips into small segments improves chip evacuation and cutting speed. Under the same cutting conditions, a straight-style edge ensures better surface finish. Therefore, chip-splitting geometry is suitable mainly for rough drilling operations.
  • What are the advantages of the concave, pagoda-shape, cutting edges of SUMOCHAMIQ exchangeable drilling heads?
    The shape of the cutting edge substantially enhances the self-centering capability of the drill and enables drilling holes of depths up to 12×d directly into solid material, without pre-drilling a pilot hole. In addition, the HCP geometry facilitates gradual penetration into machined material which reduces the cutting forces, obtaining better hole quality – particularly when the drilling depth is significant.
  • What are the advantages of chamfering rings for drills?
    A chamfering ring is intended for mounting in the body of a standard drill in the desired position according to the drill tip. The ring mounting configures a combined holemaking tool that can perform drilling and chamfering in one operation.
  • What does the abbreviation "BTA" indicate in deep drilling?
    In drilling, BTA stands for "Boring and Trepanning Association". It typically relates to the unique design of deep drilling tools, which can be represented by both deep drills and deep drilling heads. These are also commonly referred to as "Single Tube System (abbreviated by STS) deep drilling tools."
  • Is it possible to regrind LOGIQ3CHAM 3 flute exchangeable drill heads directly at the customers' premises?
    Regrinding new geometries of these 3 flute drill heads is complicated and cannot usually be done locally.
  • What are the ISCAR products for deep drilling?
    ISCAR's line of deep drilling tools comprises gundrills and drills for ejector and single tube (STS) systems.
  • Can the SUMOCHAM drills be mounted in FLEXFIT threaded adaptors and tool holders?
    ISCAR produces modular drills combining SUMOCHAM design with a FLEXFIT threaded connection to enable mounting. A wide range of FLEXFIT threaded adaptors and flatted shanks ensures configuration of the assembled drill with a maximally shortened overhang, so that the modular drills can be used on machines with limited space for tooling (for example on multi-spindle and Swiss-type machines).
  • Do the terms "step drill" and "subland drill" mean the same?
    Not exactly. A step drill is a drill with cutting areas of different diameters to generate a step-diameter hole in one pass. A subland drill is a solid twist step drill, which features different lands for each diameter. However, a step twist drill has the same land along the drill body. Usually, there are two drilling areas in a subland drill. A subland drill is a sub type of step drill.
  • When should a carbide guide pad in a deep drilling tool be reversed or replaced?
    Even though the guide pads do not cut material, they, like carbide cutting inserts or heads, are subject to wear. A damaged or worn out guide pad causes unacceptable roughness and scratching of the machined hole surface.
    The pads should be thoroughly examined visually before applying a drill. If a pad is damaged or the pad working corner wears out approximately 70% of the corner width, the pad should be reversed or replaced.
  • What is a stub drill?
    Commonly called a twist drill with a shortened length of flute to make the drill stronger and more rigid.
    Stub drills are often referred to as extra-short-length drills.
  • What is the main application of ISCAR's flat drills and drilling heads?
    The main application of these tools is their drilling hole with a nearly flat bottom. For example, counterbores for screw heads, spring seats, seal housings, etc.
    The advantage is that no pre-drilling is required when drilling directly into solid materials.
  • ISCAR's product range of tools for machining composite materials includes solid carbide drills with PCD nibs and wafers.
    Can these drills be resharpened?
    Yes, they can. Both drill types have a large area for multiple regrinding and can be reground several times.
  • มีดเจาะใดที่เป็นมีดเจาะไมโคร?
    แม้ว่าจะไม่มีคำจำกัดความทั่วไป แต่มีดเจาะที่มีเส้นผ่านศูนย์กลางน้อยกว่า 2-3 มม. (0.08-.125") ก็เป็นมีดเจาะไมโคร
  • อะไรคือการกัดเจาะ?
    เป็นเครื่องมือหมุนรวมที่ประกอบด้วยส่วนตัดสองส่วน: เครื่องมือเจาะและหัวกัดรอบข้าง เครื่องมือเจาะมีวัตถุประสงค์เพื่อเจาะรู ด้วยการรวมหัวกัดเข้าด้วยกัน รูสามารถขยายได้
  • ISCAR มีมีดเจาะก้นแบนพร้อมคมกัด 3 ร่องเกลียวหรือไม่?
    กลุ่มผลิตภัณฑ์ ISCAR LOGIQ-3-CHAM ประกอบด้วยหัวเจาะก้นแบน 3 ร่องเกลียว ซึ่งสามารถติดตั้งกับมีดเจาะชนิดใดก็ได้ที่เกี่ยวข้องกับกลุ่มผลิตภัณฑ์นี้ เพื่อสร้างรูก้นแบนในวัสดุแข็งโดยไม่ต้องเจาะรูนำร่อง
  • MODUDRILL คืออะไร?
    MODUDRILL ของ ISCAR เป็นระบบเครื่องมือเจาะแบบแยกส่วน เครื่องมือ MODUDRILL ทั่วไปคือการประกอบเครื่องมือที่ประกอบด้วยตัวเหล็กและหัวเจาะแบบถอดเปลี่ยนได้ซึ่งติดตั้งอยู่บนตัวเครื่องเดียวกัน หัวมี 2 ประเภท: ประเภทแรกมีไกด์แพดที่มีเม็ดมีดคาร์ไบด์แบบถอดเปลี่ยนได้ และแบบที่สองมีหัวโซลิดคาร์ไบด์ CHAM-IQ-DRILL แบบเปลี่ยนได้ นอกจากนี้ ระบบยังมีส่วนต่อขยายเหล็กที่สามารถติดตั้งบนตัวเครื่องเพื่อเพิ่มความลึกในการเจาะ
  • ดอกสว่านเจาะนำ NC คืออะไร?
    ดอกสว่านเจาะนำ NC (เรียกอีกอย่างว่า ดอกสว่าน NC) เป็นมีดเจาะที่แม่นยำซึ่งมีระยะกินลึกที่เล็ก ซึ่งโดยทั่วไปจะอยู่ที่ความสูงของจุดดอกเจาะ ดอกสว่านเจาะนำ NC มีไว้สำหรับการเจาะนำร่องในตำแหน่งที่แม่นยำเป็นหลัก และเพื่อให้แน่ใจว่าการเจาะครั้งต่อ ๆ ไปแม่นยำและรวดเร็วโดยไม่ต้องใช้บุชชิ่ง โดยเฉพาะอย่างยิ่งในเครื่องจักร CNC โดยปกติ มีดเจาะ NC จะมีมุมจุด 90 องศา
  • What is peck drilling?
    In peck drilling also referred to as drilling with peck feed or simply "pecking", a drill is repetitively retracted to evacuate chips to dissipate heat.
  • What is a circuit board drill?
    A circuit board drill is a high-precision micro drill that is intended for drilling composite laminates – the main material for producing printed circuit boards, referred to as printed wiring boards (designated as PCB and PWB).
  • What is 'thrust force' in drilling?
    In drilling, the thrust force is an axial force that acts in the feed direction. This force compresses the drill along its axis. The thrust force is the resulting force of axial loads on the chisel edge, the major cutting edges (lips), and the minor cutting edges of a drill, while approximately 50% of the thrust force falls on the chisel edge.
  • What hole accuracy do ISCAR SUMOCHAM assembled drills with exchangeable carbide heads provide?
    ISCAR's SUMOCHAM assembled drills with exchangeable carbide heads provide hole accuracy in the IT10-IT9 ISO tolerance grades under normal cutting conditions.
  • What challenges are encountered when drilling construction beams, and what are the distinctive features of ISCAR's drills with exchangeable heads that are specifically designed for these tasks?
    Steel construction beams play a crucial role in building structures and frameworks, requiring the drilling of numerous holes prior to assembly. However, the clamping mechanisms on machines often lack rigidity, posing a challenge for drilling tools. To address these limitations, it is essential for drilling tools to have an adaptive design that compensates for non-rigid conditions, and optimal drilling performance. ISCAR's solution based on the established concept of assembled tools with an exchangeable drilling head made from tungsten carbide. This solution, which incorporates three key elements: cutting material, cutting geometry and body design, provides an effective tool for drilling relatively thin beam sections under unstable conditions.
  • In twist drills, which flute helix is considered as slow and which as quick?
    In twist drills, the flute helix is often categorized as slow or quick. There is not a strict definition for this characteristic of a drill flute helix, as different tool manufacturers often have their own descriptions. As a general guideline, a helix angle less than 40° is usually associated with a slow flute helix, while a helix angle equal to or above 40° features a quick (or fast or high) helix. Some manufacturers specifically refer to a flute with a helix angle of 20-30° as having a slow helix. Conversely, other manufacturers classify the twist drills they produce into three categories according to the helix angle: slow, normal, and quick helix.
  • What are the main difficulties in deep drilling?

    Besides the challenges present in general drilling operations, deep drilling introduces several specific difficulties.

    One major issue is problematic chip evacuation - chips can become trapped within the hole, deteriorating surface finish and potentially causing drill breakage. While the "pecking" drilling method can help address chip evacuation, it also decreases productivity and increases machining costs.

    Restricted coolant supply is another significant challenge. Insufficient cooling and lubrication not only impair cutting efficiency but also worsen chip evacuation.

    Additionally, decreased drill rigidity in deep drilling operations can lead to drill deflection, "walking," and vibrations, all of which negatively impact machining accuracy and tool life.

    Reaming
  • When is a reaming operation required?
    A reaming operation is needed when the tolerance or/and surface finish requirements are tight and can't be achieved by drilling or boring.
  • For what tolerance field are the standard reamers suitable?
    Standard ISCAR reamers are suitable for IT7 field.
  • Are the standard reamers suitable for all materials?
    Standard reamers are suitable for most materials, but for the ISO N and ISO S material groups, it is preferable to consult the technical department for the most suitable solution.
  • What is the average tool life for a reamer?
    Since there are many different factors that affect its tool life (such as material, coolant, tolerance, runout etc.), it is difficult to estimate tool life and each case should be investigated individually.
  • Is it possible to ream without any coolant?
    No. It is impossible to ream without coolant; the most optimal situation is working with internal coolant but reaming with external coolant is also an option.
  • What recommended stock material should be left over before reaming?
    The recommended stock material depends on the machined material, reamer diameter and the tool used for hole preparation. In general, it can range from 0.15 to 0.4 mm per diameter.
  • What is the highest spindle runout possible for a reaming operation?
    In general, the highest spindle runout possible for reaming is around 0.01mm, but this also depends on the size and tolerance requirement. Above 0.01mm, the customer should use an ADJ system for runout compensation and adjustment.
  • ข้อได้เปรียบหลักของมีดคว้านของ ISCAR กับอุปกรณ์หมุนคืออะไร?
    มีดคว้านนี้รวมมีดคว้านความเร็วสูง BAYO-T-REAM เข้ากับอุปกรณ์หมุนในเครื่องมือเดียว เพื่อให้แน่ใจว่าได้รูที่แม่นยำพร้อมพื้นผิวที่เหมือนกระจกเงาที่ยอดเยี่ยม
  • What do letters "BN" and the number after them in designations of BAYO-T-REAM reaming heads mean?
    The letters "BN" in the designations of BAYO-T-REAM reaming heads refer to "bayonet number". The number after "BN" indicates the specific size of the bayonet connection to mount a solid carbide reaming head in a holder, such as BN5, BN6 and so forth.
  • Do BAYO T-REAM reamers with exchangeable multi-flute carbide heads adhere to the "no setup time" principle?
    The answer is yes. According to this principle, there is no need for additional setup operations when replacing a worn head with a new one. This can be done while the reamer is clamped directly in the spindle of a machine tool.
    ISO
  • How to increase productivity for super alloys and Ni-based materials with ISCAR Ceramic Grades?
    ISCAR has a wide range of ceramic grades, such as the IW7, for machining super alloys and Ni-based materials.
    Our ceramic grades have the ability to work ten times faster in cutting speed - from 150M/min up to 450M/min - which is ten times higher than any conventional carbide inserts. This dramatically increases productivity.
  • What is ISCAR’s first choice in chip formers for steel machining?
    ISCAR introduces three new chipformers for finishing medium and rough turning of steel: F3P, M3P and R3P.
    The chipformers, combined with ISCAR’s SUMO TEC grades, deliver higher productivity, longer tool life, improved workpiece quality, and more reliable performance. The new chipformers generate less heat and avoid the problem of chips attaching themselves to cutting tools and components. Chips are broken down into smaller pieces, preventing them from tangling around the workpiece and enabling more efficient removal from conveyor belts.
  • How to improve chip control with the CBN insert?
    CBN inserts are mainly used for machining hard materials with high hardness levels from 55 and up to 62 Rc. Conventional CBN inserts offer a wide range of brazed and flat tips that produce long and curled chips during the turning/machining of hard steel. The result is long chips that scratch the work piece and damage the surface quality. The ISCAR solution is a new CBN insert with ground chip breaker on the cutting edge, providing excellent chip control in medium to finishing applications with high surface quality.
  • How to reduce vibrations on a boring bar with a high overhang of more than 4xBD?
    Throughout the world, machinists have to deal with the presence of problematic vibrations on a daily basis. To help solve these difficulties, ISCAR’s Research and Development division has produced an anti-vibration boring bar which contains the dampening mechanism inside the body. This reduces and even eliminates vibrations when using boring bars with a high overhang. The new anti-vibration line is called WHISPERLINE.
  • How to increase productivity in gray cast iron machining with ISCAR Ceramic Grades?
    Gray cast iron is recognized as the most popular material in the automotive industry. For machining gray cast iron, ISCAR offers a wide range of ceramic grades such as IS6 SiAlON inserts.
    The IS6 grade was developed in order to increase productivity in gray cast iron machining. The main advantage of our IS6 SiAlON ceramic grades is the ability to work three to four times faster in cutting speed, from 400M/min and up to 1200M/min, which is three times higher than any conventional carbide inserts. This increases productivity dramatically.
  • What is ISCAR’s first choice in chip formers for stainless steel?
    ISCAR is introducing 3 new chipformers: F3M, M3M and R3M for finishing, medium and rough turning stainless steel which, together with the most advanced SUMOTEC grades, provide higher productivity, tool life and performance reliability.
    The F3M chipformer has positive rake angles for smooth cutting, reduced cutting forces and insert wear, leading to dramatically increased tool life.
    The M3M chipformer is for medium machining of stainless steel with reinforced cutting edge and positive rake angle to reduce cutting forces and for smooth cutting.
    The R3M chipformer for chip breakers is for rough machining of stainless steel with reinforced cutting edge and positive rake angle to reduce cutting forces.
  • What is the effect of high-pressure coolant?
    The main advantage of the JETCUT tools is the ability to supply the coolant directly into the cutting zone to ensure high coolant efficiency in order to improve chip control, reduce heat and extend insert life.
    The high pressure coolant effect is mainly achieved in the machining of sticky and gummy materials such as super alloys, stainless steel, titanium etc…
  • ISCAR มีเครื่องมือสำหรับงานกลึงแกน Y หรือไม่?
    ใช่, ISCAR มีเครื่องมือเหล่านี้
  • Can the application of the QUICK-T-LOCK family to Y-axis multi-directional turning potentially lead to spindle damage?
    The principles of Y-axis multi-directional turning (MDT) are applicable to QUICK-T-LOCK solutions. Operating the spindles safely follows the guidelines for any Y-axis MDT operations.
    During the design and testing of QUICK-T-LOCK products at ISCAR's Technical Center, there have been no reported issues of spindle overloading or damage. However, it is recommended to adhere to ISCAR's recommendations for these products to optimize loading conditions.
    For additional safety measures, it is advisable to secure the free end of a machined workpiece with a tailstock if feasible.
  • What is the difference between a turning tool and a lathe tool?

    The terms "turning tool" and "lathe tool" are often used interchangeably, but a slight difference, which is rooted in historical practice, does exist.


    Traditionally, a "turning tool" refers specifically to the cutting tool used for longitudinal external turning operations on a lathe: machining cylindrical, conical, and profiled surfaces. In contrast, "lathe tool" is a broader term that encompasses any tool used on a lathe.
    This covers not only classic turning but also related-to-turning operations like facing, parting (cutting-off), grooving, chamfering, internal turning (boring), external and internal threading, and even knurling, which is a forming rather than a cutting process.


    Therefore, although today "turning tool" and "lathe tool" are often treated as synonyms, historically and by strict definition, all turning tools are lathe tools, but not every lathe tool is a turning tool.
    Additionally, the term "lathe tool" is becoming less common and somewhat outdated.

    Ceramic Grades & Inserts
  • How to increase productivity of Ni-based and other superalloys with ISCAR ceramic grades?
    ISCAR has a wide range of ceramic grades, for example IW7, for machining Ni-based and other superalloys. Our ceramic grades have the ability to work 10 times faster in cutting speed, starting from 150M/min and going up to 450M/min which is 10 times higher than any conventional carbide inserts. This increases productivity dramatically.
  • Which chip formers does ISCAR recommend for steel machining?
    ISCAR has introduced three new chip formers for finishing medium and rough turning of steel: F3P, M3P and R3P. Combined with ISCAR’s SUMO TEC grades, the chip formers offer higher productivity, longer tool life, improved workpiece quality and more reliable performance. The new chip formers generate less heat and avoid the problem of chips attaching themselves to cutting tools and components. Chips are broken down into smaller pieces, preventing them from tangling around the workpiece and enabling more efficient removal from conveyor belts.
  • How to improve chip control with CBN inserts?
    CBN inserts are mainly for machining hard materials with high hardness - from 55 and up to 62 Rc materials. Conventional CBN inserts offer a wide range of brazed and flat tips that produce long and curled chips during the turning machining of hard steel, resulting in long chips that scratch the work piece and damaging the surface quality. The ISCAR solution is a new CBN insert with ground chip breaker on the cutting edge, which provides excellent chip control in medium to finishing applications with high surface quality.
  • How to reduce vibrations on boring bars with a high overhang of more than 4xBD?
    Throughout the world, machinists deal daily with problematic vibrations. ISCAR’s Research and Development department has designed and developed the WHISPERLINE range of anti-vibration tools to resolve this issue, including a boring bar with the dampening mechanism inside the body that eliminates and reduces vibrations when using bars with a high overhang.
  • How to increase productivity of gray cast iron with ISCAR ceramic grades?
    The most popular material in the automotive industry is gray cast iron. For machining gray cast iron, ISCAR offers a wide range of ceramic grades including IS6 SIALON inserts. Developed especially to increase productivity in gray cast iron, the IS6 SAILON grade can work 3 or 4 times faster in cutting speed - from 400M/min and up to 1200M/min which is 3 times higher than any conventional carbide inserts. This increases productivity dramatically.
  • What is ISCAR’s first choice in chip formers for stainless steel?
    ISCAR has introduced three new chip formers: F3M, M3M and R3M for finishing, medium and rough turning stainless steel. Combined with the most advanced SUMOTEC grades, the chip formers provide higher productivity, tool life and performance reliability. The F3M Chipformer has positive rake angles for smooth cutting, reduced cutting forces and insert wear, leading to dramatically increased tool life. The M3M Chipformer is designed for medium machining of stainless steel with reinforced cutting edge and Positive rake angle, to reduce cutting forces and ensure smooth cutting. The R3M Chipformer for chip breakers is designed for rough machining of stainless steel with reinforced cutting edge and positive rake angle, to reduce cutting forces.
  • What is the effect of high-pressure coolant?
    JETCUT tools have the ability to supply coolant directly into the cutting zone, ensuring high coolant efficiency, improved chip control, reduced heat and longer insert life. The high pressure coolant effect is applied to the machining of sticky and gummy materials such as super alloys, stainless steel, titanium etc.
    Threading
  • What is the most suitable grade for machining stainless steel?
    IC1007
  • What is the most suitable grade for machining HTA?
    IC806
  • What is the most suitable grade for low speed and unstable machines?
    IC228
  • What is the smallest recommended pass for thread profile?
    Bigger than honing size
  • Why doesn’t the chip breaker function?
    Apparently the depth of cut is too small, so the chip breaker is inefficient
  • How we can improve chip control?
    Improve chip control by selecting the correct infeed type:
    • Radial infeed
    • Flank infeed
    • Alternating flank infeed
  • How we can shorten process time?
    Use with multi tooth threading inserts (2M, 3M)
    Using two or three teeth combinations allow fewer passes and shorter cutting times. These are available for the most common profiles and pitches and are a good choice for economic threading in mass production.
  • What is the difference between partial to full profile insert?
    Partial profile:
    • Performs different thread standards and is suitable for a wide range of pitches that have a common angle (60º or 55º)
    • Inserts with a small root-corner radius suitable for the smallest pitch of the range
    • Additional operations to complete the outer/internal diameter is necessary
    • Not recommended for mass production
    • Eliminates the need for different inserts
    Full profile:
    • Performs complete thread profile
    • Root corner radius is only
    • Suitable for the relevant pitch
    • Recommended for mass production
    • Suitable for one profile only
  • How to select the correct anvil?
    Anvils for positive inclination angle are applicable when turning RH thread with RH holders or LH thread with LH tool holders.
    Anvils for negative inclination are used when turning RH thread with LH holder or LH thread with RH tool holder.
    Use AE Anvils for EX-RH and IN-LH Tool holders.
    Use Al Anvils for IN-RH and EX-LH Tool holders.
  • Which screw threads are considered as miniature and which as micro?
    Principally, both the definitions of "miniature" and "micro" are not universally standardized, and different industries have their own specific size ranges for miniature and micro screw threads.
    In general, miniature screw threads typically refer to threads with diameters ranging from around 0.3 mm (.012") up to about 2 mm (.08"). These threads are commonly used in applications such as electronics, small appliances, and precision instruments.
    On the other hand, micro screw threads are usually even smaller, with diameters typically 0.3 mm (.012") and below. These extremely small threads are commonly found in microelectronics, medical devices, optical equipment, and other specialized industries where precision and miniaturization are crucial.
  • What are the advantages of thread milling cutters?
    • High Accuracy: Thread milling cutters produce threads with good accuracy and consistency, meeting tight tolerances.
    • No Special Equipment Needed: There is no need for special equipment to remove a broken tool, as is often required in tapping.
    • Improved Surface Finish: The smooth cutting action of thread milling results in a superior surface finish compared to tapping.
    • Versatility: It can be used to create a wide range of thread profiles, including metric, inch, and custom threads.
    • Longer Tool Life: Thread milling cutters typically have longer tool life compared to taps, reducing downtime and costs.
    • Reduced Risk of Thread Stripping: The controlled cutting process minimizes the risk of thread stripping, especially in brittle materials.
    • When thread milling, which coolant supply method is preferable: wet or dry?
      Wet, for better chip evacuation and surface quality
    • How to choose the correct diameter of a thread milling tool?
      The tool cutting diameter (DC) should be approximately 2/3 of the thread major diameter (Do). Using a tool diameter that is too large can cause distortion and an incorrect thread profile.
    • What is the most suitable thread milling tool for hard-to-machine materials?
      For hard-to-machine materials, such as hardened steel with hardness up to HRC 62, the recommended choice is solid carbide thread endmills - MTECH regular R.H. thread tools and MTECSH - short solid carbide thread endmills for hardened steel with left-hand (L.H.) cut and climb milling.
    • What is the most suitable thread milling tool for effective and precise machining inner threads in thin-walled components?
      • To prevent hole distortion in thin walls, lower cutting forces are necessary. This can be achieved by using a single tooth cutter. However, the SOLIDMTHREAD line of solid carbide internal threading endmills with step release and two or three-pitch lead can be successfully applied to machining inner threads in thin-walled parts and other cases of unstable cutting, too.
      • Additionally, QUICK-M-THREAD line of indexable threading endmills with Weldon shanks and coolant holes for single point inserts for bigger diameters.
    • What is the suitable coolant supply type for thread milling in blind holes?
      A coolant supply with the use of a central coolant hole, like those in the solid carbide thread endmills MTECB, MTECBF, MTECK, MTECM, provides excellent chip evacuation and prevents recutting, making it optimal for machining blind holes.
    • What is the suitable coolant supply type for thread milling in through holes?
      • A coolant supply via coolant channels, peripherally located on the tool, like those in solid carbide thread endmill MTECZ (and almost all indexable tools), which directs the coolant to the cutting edges along the flutes, is an effective cooling solution when thread milling in through holes.
      • In addition, using thermal shrink chucks with tapered shanks and coolant jet channels along the shank bore X-STREAM, and ER-SRK-CX collets offer reasonable options for effective cooling.
    • What are the advantages of conventional milling (up milling) in threading?

      The advantages of conventional milling, or up milling in threading, include:

      • Thin to Thick Chip: The chip thickness increases gradually, which is beneficial for machining.
      • Machining Cast Iron or Hardened Materials : The cut begins under the surface of the material, making it suitable for these materials.
      • Machining with Long Overhang: It is advantageous when machining with a long overhang as it reduces vibration and deflection.
    • What are the advantages of climb milling (down milling) in threading?
      • Thick to Thin Chip Formation: The cutting action starts with the maximum chip thickness and gradually decreases, leading to better heat distribution and reduced cutting forces.
      • Better Surface Finish : The stable tool engagement and cutting action often result in a superior surface finish.
      • Less Power Consumption: The cutting forces are directed downward, reducing the power required for the operation.
      • Improved Tool Life: The reduction in cutting forces and better heat distribution can extend the tool's lifespan.
      • Better Chip Evacuation: Chips are thrown behind the cutter, aiding in better chip evacuation and reducing the risk of recutting chips.
    • Where can I learn more about thread milling cutters?
      You can find additional information and resources on thread milling cutters from various sources, including ISCAR's website and e-catalog.
      Tool Material Grades
    • What is a tool material?
      In cutting tools, a tool material is the material from which the active (cutting) part of a tool is produced. This is the material that directly cuts the workpiece during machining.
    • How does ISCAR designate its tool materials?
      ISCAR’s system of designating tool material grades uses letters and numbers. The letters indicate the material group:
      IB – cubic boron nitride (CBN)
      IC – cemented carbide and cermet
      ID – polycrystalline diamond (PCD)
      IS – ceramics
      DT – cemented carbide with dual (CVD+PVD) coating
    • What is a carbide grade?
      A combination of cemented carbide, coating and post-coating treatment produces a carbide grade. Only one of these components - the cemented carbide - is the necessary element of the grade. The others are optional. Cemented carbide is a composite material comprising hard carbide particles that are cemented by binding metal (mainly cobalt).
      Most cemented carbides used for producing cutting tools integrate wear-resistant coating and are known as “coated cemented carbides”. There are also various treatment processes that are applied to already coated cemented carbide (for example, the rake surface of an indexable insert). “Cemented carbide” can refer both to the substrate of a coated grade and to an uncoated grade.
    • How does ISCAR classify carbide grades?
      The international standard ISO 513 classifies hard cutting material based on their reasonable applicability with respect to the materials. ISCAR adopted this standard and uses the same approach in tool development. Cemented carbides are very hard materials and therefore they can cut most engineering materials, which are softer. Some carbide grades demonstrate better performance than others in cutting tools applied to machining a specific class of materials.
    • The groups of application of carbide grades in accordance with ISO 513 include letters and numbers after the letter. What do they mean?
      The letters in the group of application define a class of engineering materials, to which a tool that is produced from a specific grade, can be applied successfully. The classification numbers show hardness-toughness ratio of the grade in an arbitrary scale. Higher numbers indicate an increase in grade toughness, while lower numbers indicate an increase in grade hardness.
    • What is SUMO TEC technology?
      SUMO TEC is a specific post-coating treatment process developed by ISCAR. The treatment has the effect of making coated surfaces even and uniform, minimizing inner stresses and droplets in coating. In CVD coatings, due to the difference in thermal expansion coefficients between the substrate and the coating layers, internal tensile stresses are produced. Also, PVD coatings feature surface droplets. These factors negatively affect a coating and therefore shorten insert tool life.
      Applying SUMOTEC post-coating technologies considerably reduces and even removes these unwanted defects and results in increasing tool life and greater productivity.
    • Why are PVD nano layered coatings considered so efficient and progressive?
      PVD coatings were introduced during the late 1980’s. With the use of advanced nanotechnology, PVD coatings performed a gigantic step in overcoming complex problems that were impeding progress in the field.
      Developments in science and technology brought a new class of wear-resistant nano layered coatings. These coatings are a combination of layers having a thickness of up to 50 nm (nanometers) and demonstrate significant increases in the strength of the coating compared to conventional methods.
    • The designation of ISCAR’s carbide grades usually starts from letters “IC”. Why is grade DT7150 (DO-TEC) designated differently?
      Coating technology features two principal directions - Chemical Vapor Deposition (CVD) and Physical Vapor Deposition (PVD). Technology development allows both methods – CVD and PVD – to be combined for insert coatings, as a means of controlling coating properties.
      ISCAR’s carbide grade DT7150 features a tough substrate and a dual MT CVD (Medium Temperature CVD) and TiAlN PVD coating. The grade was originally developed to improve the productive machining of special-purpose hard cast iron.
    • Why are several of ISCAR’s carbide grades referred to by customers as “sun tan” grades?
      Some PVD coated (like IC840 or IC882) and CVD coated (IC5820, for example) carbide grades, originally developed for machining ISO S and ISO M materials, feature a bronze chocolate color. The “sunbathed” appearance of the inserts produced from these grades resulted in the shop talk definition “sun tan” grade.
    • What are the fundamental differences between these commonly used definitions: "ultra-fine", "submicron" and "fine" carbide grades?
      Each of these definitions relate to the size of the carbide grains in a carbide grade substrate. Sizes may slightly differ for various standards and norms of carbide product manufacturers, but usually they refer to the following:
      1 - 1.4 μm (40 - 55 μin) grain size         fine grade
      0.7 - 0.9 μm (27.5 - 35 μin) grain size   submicron grade
      0.2 - 0.6 μm (8 - 24 μin) grain size        ultra-fine grade

      In addition, depending on the grain size, there are medium, coarse, extra coarse and even nano carbide grades. The last, for example, features extremely small grain sizes: less than 0.2 μm or 8 μin.
    • Which terms are correct: "cemented carbide", "tungsten carbide", "wolfram carbide" or "hard metal"?
      All four terms refer to cemented tungsten carbide. "Tungsten" is another name for the chemical element Wolfram. (Incidentally, the word origin is Swedish, meaning "heavy stone").
      In the field of cutting tool manufacturing, the terms "cemented carbide", "tungsten carbide" and the abbreviation "HM" (hard metal) are usually used.
    • What are the main properties of ceramics as a cutting tool material?
      When compared with cemented carbides, ceramics possess considerably higher hot hardness and chemical inertness. This means that ceramics ensure much greater cutting speeds and eliminate diffusion wear. Ceramics have lower crack resistance – this feature emphasizes the importance of cutting-edge preparation as a factor of successful machining.
    • What are the main types of ceramics?
      There are two main types of ceramics:
      • Based on aluminum oxide or alumina (Al2O3)
      • Based on silicon nitride (Si3N4)
      Aluminum oxide based ceramics include pure ("oxide" or "white"), mixed ("black"), and reinforced ceramics.
      Silicon nitride based ceramics can be divided into several types, according to content, mechanical properties and production technology. SiAlON ("sialon") ceramics generally fall into this category.
      As cutting materials, ceramics lie between cemented carbides and super hard materials such as polycrystalline diamond (PCD) and cubic boron nitride (CBN), according to their toughness-hardness characteristics.
    • What are the advantages of whisker-reinforced ceramics?
      Whisker-reinforced or "whisker" ceramics are aluminum oxide based ceramics that are reinforced by uniformly dispersed silicon carbide whiskers. Whisker ceramics have higher hardness and strength than unreinforced alumina based ceramics, which improves cutting performance.
    • What is sialon?
      Sialon or, more accurately, SiAlON, is a type of ceramic comprising silicon (Si), aluminum (Al), oxygen (O) and nitrogen (N). SiAlON may be considered as a type of silicon nitride based ceramic but features less toughness and higher oxidation resistance. It is simpler to produce SiAlON than to produce other silicon nitride based ceramics.
    • What is cermet?
      The word "cermet" is made from "ceramic" and "metal". It designates an artificial composite material usually manufactured by powder metallurgy technology. Cermet is a type of cemented carbide where hard particles are represented by titanium-based compounds instead of the tungsten carbides that characterize the cemented carbides commonly used in cutting tools. When compared with tungsten carbides, cermet has higher resistance to abrasive and oxidation wear but its toughness is considerably smaller. In addition, cermet is very sensitive to thermal load.
    • What is the difference between CBN and PCBN?
      Both CBN and PCBN relate to Boron Nitride (BN) - a polymorph material formed by two chemical elements. Boron Nitride exists in different crystal structures. One is cubic and the BN in this structure is Cubic Boron Nitride (CBN).
      As a cutting tool material, CBN is used as a polycrystalline compound, where CBN particles and an added binder are sintered together. The material produced is "Polycrystalline CBN" or simply "PCBN". The percentage of CBN can vary in different PCBN grades. In the context of cutting tools, the commonly used abbreviations "CBN" and "PCBN" may be considered as synonyms.
    • Can the cutting ceramics, CBN and PCD be applied to machining titanium?
      Cutting ceramics and cubic boron nitride (CBN) are not suitable for machining titanium, although polycrystalline diamond (PCD) has proved itself in finish machining titanium in several cases.
    • มาตรฐาน ISO 513 เกี่ยวข้องกับซีเมนต์คาร์ไบด์เท่านั้นหรือไม่?
      คำตอบคือไม่ มาตรฐาน ISO 513 นี้ระบุการใช้งานและข้อกำหนดของวัสดุตัดเฉือนแข็ง เช่น ซีเมนต์คาร์ไบด์ เซรามิก เพชร และโบรอนไนไตรด์
    • What is the main application of diamond-like carbon (DLC) coated tools?
      DLC-coated tools are intended mostly for machining aluminum and non-ferrous materials (ISO N group of application).
    • วัสดุตัดใดที่เรียกว่าแข็งพิเศษ?
      โดยปกติ เพชรและคิวบิกโบรอนไนไตรด์ (CBN) เป็นวัสดุตัดเฉือนที่แข็งที่สุดสองชนิดซึ่งถือเป็นวัสดุแข็งพิเศษ
    • อะไรคือความแตกต่างระหว่างการเคลือบ TiAlN และ AlTiN ?
      ความแตกต่างที่สำคัญระหว่างการเคลือบไทเทเนียมอะลูมิเนียมไนไตรด์ (TiAlN) หรือการเคลือบอะลูมิเนียมไทเทเนียมไนไตรด์ (AlTiN) คือเนื้อหาของอะลูมิเนียมซึ่งไม่เกิน 50% เมื่ออ้างอิงถึง TiAlN และมากกว่า 50% ใน AlTiN องค์ประกอบโลหะที่มีอำนาจเหนือจะถูกเขียนขึ้นก่อนในสูตรการเคลือบ
    • What is a superlattice?
      In cutting tool coatings, this is another term for multi-layer nano coating.
    • What is the main function of coatings in cutting tools?
      The main function of cutting tool coatings is to improve the wear strength of a tool, specifically to increase resistance to abrasion, adhesive wear, and to provide thermal protection for prolonged tool life.
    • อะไรคือข้อดีของเพชรธรรมชาติในฐานะวัสดุเครื่องมือเมื่อเปรียบเทียบกับเพชรคริสตัลไลน์สังเคราะห์ (PCD)?
      โครงสร้างแบบโมโนคริสตัลไลน์ของเพชรธรรมชาติมอบรูปทรงล้ำสมัยที่สมบูรณ์แบบโดยไม่มีจุดเชื่อมต่อใด ๆ คุณลักษณะนี้มอบข้อได้เปรียบอย่างมากเพื่อให้แน่ใจว่าพื้นผิว "เงา " สูงมากเป็นพิเศษซึ่งจำเป็นในการใช้งานบางอย่าง เช่น การตัดเฉือนชิ้นส่วนที่สำคัญของอุปกรณ์ออฟติคัล ในทางตรงกันข้าม คมตัด PCD เกิดจากคริสตัลหลายชนิด ทำให้เกิดรอยต่อที่เหมาะสมบนขอบ ดังนั้นจุดต่อทุกจุดจะสร้างรอยแยกของตัวเองบนพื้นผิวที่กลึง
    • เกรด PCBN ใดที่ถือว่ามีเนื้อ CBN สูง และเกรดใดมีเนื้อ CBN ต่ำ?
      หัวข้อนี้ไม่ได้กำหนดไว้ แต่ขึ้นอยู่กับเปอร์เซ็นต์ CBN และเกรด PCBN ซึ่งจะถูกแบ่งตามรายละเอียดดังนี้: - เกรดที่มีเนื้อ CBN สูง (85% ขึ้นไป), - เกรดที่มีเนื้อ CBN ต่ำ (ประมาณ 55%).
    • MT CVD คืออะไร?
      ในเรื่องของเครื่องมือกัดกลึง MT CVD เป็นวิธีการเคลือบผลิตภัณฑ์ที่ทำจากการตัดวัสดุ โดยเฉพาะเม็ดมีดที่ถอดเปลี่ยนได้จากซีเมนต์คาร์ไบด์ จากการสะสมไอสารเคมี (CVD) โดยตัวอักษร "MT" คือ " Medium หรือปานกลาง" (บางครั้งเรียกว่า " Moderate ") และ " Temperature หรืออุณหภูมิ " เนื่องจาก MT CVD ใช้อุณหภูมิประมาณ 800°C (1470°F) ซึ่งต่ำกว่ามากเมื่อเทียบกับ 900-1000°C (1650-1830°F) ที่ใช้ในกระบวนการเคลือบ CVD ทั่วไป
    • What is HSS-PM?
      HSS-PM is the abbreviation that relates to high-speed steel (HSS), produced by use of powder metallurgy (PM) technology.
    • What is the purpose of adding various substances to pure tungsten carbide in carbide grades?
      In tungsten carbide grades, cobalt is commonly used as the binder, while other substances are added to enhance the performance capabilities of the grade. For instance, the addition of tantalum carbide (TaC) improves thermal deformation resistance, while the addition of titanium carbide (TiC) helps reduce crater formation.
    • What is hot hardness?
      In the context of cutting tools, hot (or red) hardness refers to the ability of a tool material to retain its high hardness and wear resistance when exposed to high temperatures. As the material's temperature increases, there comes a point where the hardness of the material dramatically decreases. This specific temperature determines the level of hot hardness for a particular tool material.
    • What is vein PCD?
      In cutting tools, vein PCD (polycrystalline diamond) is a type of man-made diamond cutting material. It is created by sintering PCD particles into a carbide substrate through a specific technological process that involves high pressure and high temperature. As a result, the produced cutting material has a vein-like structure with PCD particles ("veins") embedded within the carbide substrate.
    • What are the advantages and disadvantages of high-speed steel (HSS) as a cutting material?
      High-speed steel (HSS) offers two important advantages as a cutting material:
      • High transverse strength when compared to other cutting materials.
      • Good machinability, which simplifies the production of various complex-shaped tools and allows for multiple regrinding.
      However, HSS also has some notable disadvantages:
      • Lower hardness in comparison to hard cutting materials such as cemented carbides, cermet, ceramics etc.
      • Low red hardness, meaning its hardness diminishes when HSS is heated to approximately 650°C (1200°F).
    • What is the oxidation temperature of a cutting tool material?
      The oxidation temperature of a cutting tool material is the temperature at which the material begins to chemically react with oxygen in the air. This reaction leads to the formation of oxides on the material's surface, resulting in oxidation wear that can affect the tool's performance and its lifespan.
    • Which Tool Materials Are Considered Super Hard?
      The definition "super hard" (also known as ultra-hard or extra-hard) usually refers to materials such as diamond, in particular polycrystalline diamond (PCD), and cubic boron nitride (CBN). In some cases, diamond-coated carbide grades are also classified as superhard materials.
      Engineering Materials
    • When giving recommendations about cutting data, how does ISCAR classify engineering materials?
      ISCAR material groups are organized in accordance with international standard ISO 513 Classification and application of hard cutting materials for metal removal with defined cutting edges — Designation of the main groups and groups of application and technical guides VDI 3323 Anwendungseignung von Harten Schneidstoffen (English: Information on applicability of hard cutting materials for machining by chip removal). VDI (Verein Deutscher Ingenieure) is the Association of German Engineers.
    • The ISO 513 standard specifies cutting tools intended for machining stainless steel as the tools that apply to Group M. Is this correct?
      In ISO 513, Group M (yellow identification color) relates to the tools for machining stainless steel of austenitic and austenitic/ferritic (duplex) structure. Ferritic and martensitic stainless steel belong to Group P (blue color) and starting cutting data should be set accordingly.
    • Is machining titanium like machining austenitic stainless steel?
      Commercially pure titanium and, with some applications, α- or α-β- titanium alloys may be machined like austenitic stainless steel but not treated β- and near-β- alloys.
    • What is “titanium beta”?
      “Titanium beta” is an expression that occurs in aerospace industry lingo/shop talk. It can refer to two different materials - a β-annealed α-β- titanium alloy or, rarely, a β-alloy. Therefore the expression should be exactly specified before using it, or even avoided to prevent possible misunderstanding.
    • Why is the machinability of materials from ISO M and S groups considered together?
      These materials are difficult-to-cut materials and have common features that affect machinability: low thermal conductivity and high specific cutting force.
    • Does cast iron relate to ISO Group K?
      The majority of cast iron grades (grey, nodular, malleable) relate to Group K.
      When machining hardened or chilled cast iron, appropriate cutting tools (and corresponding cutting data) should be chosen as recommended for Group H.
      Austempered ductile iron (ADI) in its soft condition is connected with Group P.
      Austempered ductile iron (ADI) in its hardened condition is connected to Group H.
    • Which steel is pre-hardened and which is hard?
      Steel producers supply steels in different delivery conditions: annealed, pre-hardened, hardened. The loosely defined term "pre-hardened steel" relates to steel that is hardened and tempered to a hardness that is not too high - generally this is less than HRC 45. The terms "pre-hardened" and "hard steel" are allied to cutting tool development and the ability of the tools to cut material. Commonly, the steels can be divided into the following conditional groups depending on their hardness:
      • Soft (annealed to hardness up to HB 250)
      • Pre-hardened to two ranges:
        - HRC 30-37
        - HRC 38-44
      • Hardened to three ranges:
        - HRC 45-49
        - HRC 50-55
        - HRC 56-63 and more

      As for "hard steel", usually it refers to steel hardened to HRC 60 and more.
    • What is Ebonite and how to machine this material?
      Ebonite is a hard vulcanized rubber containing a high percentage of sulfur. For the purpose of identifying a suitable tool and appropriate cutting data, Ebonite is characterized by ISCAR material group 30 (ISO N application class). To machine Ebonite effectively, we advise following ISCAR’s recommendations for this group.
    • Are hard metal and heavy metal the same?
      No.
      In metalworking, "hard metal" is a commonly used name for cemented carbide, which is a sintered hard material based on wolfram (tungsten) carbide. Cemented carbide is often referred as simply tungsten carbide. It is the main cutting tool material used today.
      Heavy metals are metals with high atomic weight or density. In the metalworking industry, the term “heavy metal” usually refers to heavy metal alloys, which are sintered composite materials containing 90% or more tungsten.
    • What is the difference between duplex and super duplex stainless steels?
      Duplex stainless steel has a two-phase metallurgical structure: austenitic-ferritic, approximately in equal shares.
      Super duplex stainless steel is a type of duplex stainless steel that contains an increased percentage of chromium and molybdenum for better corrosion resistance.
      From a machinability point of view, these steels are hard-to-cut.
    • Is machining common in manufacturing plastic products? What is the machinability of plastics?
      It is really hard to imagine life today without plastics - organic materials based on synthetic or natural high-molecular compounds (polymers). Plastic products surround us everywhere. Step by step, plastics have replaced traditional materials in many industrial fields, and today plastic is considered one of the most important structural materials. Manufacturing plastic parts is connected mostly with chemical processes; however, for some cases machining is also required. From the point of view of technology, there are three major classes of plastics: thermoplastics, thermosets, and elastomers. According to their use, plastics may be divided into commodity plastics and engineering plastics. Machining is more common for producing parts from engineering plastics, which are represented primarily by thermoplastics. Plastics have very good machinability. In comparison with metals, cutting plastics is performed usually with much higher speeds and feeds, while the applied cutting tools feature significantly less wear. However, selecting appropriate cutting tools is essential to obtain the accuracy required and excellent surface finish.
    • What is Vitallium and how to machine this material?
      Vitallium is a cobalt (Co)-chrome (Cr) alloy that contents approximately 60% of Co, 30% of Cr, 8% of molybdenum and some other elements. Vitallium was developed in the 1930's, and is now used mainly in joint replacement surgery and dental medicine. The alloy is hard-to-machine. Cutting data should be set according to recommendations, related to ISCAR material groups 34 and 35.
    • What is the difference between stainless steel and corrosion resistant steel?
      These definitions are generally used synonymously, along with definitions such as rust-resistant steel, inox steel, and non-corrosive steel.
      In fact, stainless steel may actually be divided into the following types according to their main functional features:
      • Corrosion-resistant steel, resistant to corrosion under normal conditions
      • Oxidation- or rust-resistant steel, resistant to corrosion under high temperatures in aggressive environments
      • Heat-resistant or high-temperature steel that does not change its strength under high temperature stress
      Therefore, corrosion-resistant steel can be considered as a type of stainless steel.
    • What are the main difficulties in machining workpieces from high temperature superalloys with honeycomb structures?
      The main difficulty in machining these workpieces is low workpiece stiffness, caused by the workpiece's thin-wall structure. Due to the honeycomb structure, a workpiece often cannot be clamped properly, which results in a further reduction in the entire technological system's rigidity.
    • What is Nitinol and what is its machineability?
      Nitinol, also referred to as Nickel Titanium or Ni-Ti, is an intermetallic alloy of Nickel and Titanium. Machining of Nitinol causes intensive abrasion and oxidation wear on the cutting tool. In addition, cutting speed substantially affects tool life - if the speed is too slow or too high, tool life drops dramatically. In general, tools intended for the ISO S application group are used for machining Nitinol.
    • Which stainless steel is considered as super austenitic?
      Super austenitic stainless steel is austenitic stainless steel, which features high content of Molybdenum (more than 6%) and increased percentage of Chromium and Nickel. The combination of materials results in high resistance to pitting corrosion. Usually austenitic stainless steel with pitting resistance and an equivalent number (PREN) of more than 40 is super austenitic. Generally, super austenitic stainless steel has less machinability characteristics when compared to austenitic stainless steel.
    • What is "pitting resistance equivalent number"?
      The "Pitting resistance equivalent number" (PREN) is a conditional value that characterizes theoretical resistance of stainless steel to pitting corrosion based on the stainless-steel content. There are several ways to calculate PREN by use of equations.
    • What is "mild steel"?
      "Mild steel" is another name for low carbon steel.
    • What are the main difficulties in machining Hadfield steel?
      Hadfield steel has a high content of Manganese: 12% in average, and therefore often referred to as "manganese steel". It has austenitic structure which ensures high abrasive wear resistance combined with excellent impact toughness and high ductility. When machined, this steel hardens and adversely impacts machinability. Due to the high ductility of austenite and its tendency to work hardening, Hadfield steel is a very difficult-to-cut material.
    • What should be taken into account when machining Beryllium and its alloys?
      In machining Beryllium (Be) and its alloys, the fine Beryllium dust generated while cutting the material can be dangerous to health. It is essential to use machine tools equipped with appropriate chip collecting units.
      Due to Beryllium’s high brittleness, the machined surface may be damaged during machining by microcracks and microflow. To avoid surface damage, the machining process should be under control - rigid workpiece clamping and eliminating vibrations are extremely important.
      Beryllium bronze, which is also known as beryllium copper or BeCu, has good machinability. When machining this alloy, users should follow ISCAR's recommendations regarding the cutting data that relates to copper alloys.
    • What is Zamak and how to machine it?
      Zamak, also referred to as ZAMAK, ZAMAC, or Zamac, is a group of zinc-based alloys. The principal alloying elements are aluminum, magnesium and copper. These alloys feature good machinability and their cutting usually does not cause difficulties. ISCAR's tools for the ISO N group of applications are recommended for machining Zamak.
    • Which cast iron is named "vermicular" and what is its machinability?
      Vermicular cast iron is another name for compacted graphite iron (CGI). The structure of this iron features vermicular (worm-shaped) graphite particles.
      According to its machinability properties, vermicular cast iron or CGI, falls between grey and nodular cast iron.
    • What is "bainitic ductile cast iron"?
      "Bainitic ductile cast iron" (BDCI) is another name for austempered ductile iron (ADI) that is also referred as "ausferritic spheroidal graphite cast iron".
    • What is the machinability of maraging steel?
      Usually maraging steel is machined in annealed conditions without any specific problems. When steel is aged (heat treated), its machining becomes more difficult. A general rule for selecting cutting tools and finding initial cutting data is to use the same recommendations as in the case of high alloy steel of the same hardness.
    • What is "Nichrome" and how is it machined?
      "Nichrome" is the name of a whole group of Nickel-Chromium alloys. It is also referred to as Chrome-Nickel, NiCr, Ni-Cr, etc. The well-recognized Nichrome 80 (Nichrome 80/20) comprises 80% Nickel and 20% Chromium. Other Nichrome grades may contain additional elements such as Iron.
      In machining Nichrome, the initial cutting data can be chosen as it’s recommended for Nickel-based superalloys.
    • Which materials are considered exotic?
      In addition to mainstream engineering materials such as iron-based alloys (steel, stainless steel, cast iron) and common nonferrous metal alloys (aluminum alloys, brass, bronze), there are exotic types of material that were developed to answer specific demands. These exotic materials feature a dedicated application; they are rare and not commonly used and are generally more expensive to fabricate.
      An accurate agreed definition of exotic material does not exist. Many experts refer to them as metals, like Beryllium, Zirconium, etc. and their alloys, ceramics, composites, and superalloys. When considering the use of structural materials, superalloys and composites should be distinguished first. Machining exotic materials can be difficult.
    • What is Stellite, and how to machine it?
      Stellite is a range of hard cobalt-chromium alloys that are used for wear resistance and tool materials.
      Stellite has poor machinability, approximately ten times less when compared with free-cutting steel. Therefore, machining Stellite by cemented carbide tools features very low cutting speeds, yet the speed can be significantly increased by applying cutting tools from whisker reinforced ceramic.
    • การกัดไนลอน 6 ทำอย่างไร ?
      ไนลอน 6 หรือที่เรียกว่าไนลอนหล่อหรือโพลีเอไมด์เป็นโพลีเมอร์เทอร์โมพลาสติกเรซิน โดยปกติ ชิ้นส่วนจากไนลอนหล่อจะถูกผลิตขึ้นโดยการขึ้นรูป (การหล่อ) แต่ในบางกรณี จำเป็นต้องมีตัดเฉือนวัสดุประเภทนี้ ตามกฎทั่วไป การกัดไนลอนหล่อนั้นไม่มีปัญหา แม้ว่าในบางครั้งอาจเกิดปัญหาได้ เช่น ความร้อนสูงเกินไป การคายเศษ และการเสียรูปของชิ้นส่วนหลังการตัดเฉือนเนื่องจากความยืดหยุ่นของไนลอนหล่อ ในการกัด, ความเร็วตัดเริ่มต้นโดยทั่วไปจะอยู่ที่ 400-470 ม./นาที (1300-1550 sfm) สำหรับมีดกัดที่มีเม็ดมีดแบบถอดเปลี่ยนได้ และ 450-530 ม./นาที (1480-1750 sfm) สำหรับมีดกัดโซลิดคาร์ไบด์และดอกกัดเอ็นมิลล์ที่มีหัวคาร์ไบด์แบบถอดเปลี่ยนได้ ถัดไป ตามผลลัพธ์ที่ได้ ความเร็วในการตัดจะเพิ่มขึ้นได้ถึง 900-1000 ม./นาที (2950-3300 sfm) ค่าที่มากกว่าอาจทำให้เกิดความร้อนสูงเกินไป ดังนั้นจึงไม่เป็นตัวเลือกที่แนะนำ ขอแนะนำให้ใช้ระบบหล่อเย็นแบบเป่าลมระบุตำแหน่ง โดยเฉพาะอย่างยิ่งผ่านตัวตัด หากไม่จำเป็น
    • วิธีการกลึงเหล็กแรงดึงสูงของเรือ?
      เหล็กกล้าของเรือประกอบด้วยเหล็กโลหะผสมที่มีแรงดึงสูง เหล็กโลหะผสมที่ใช้เป็นส่วนใหญ่ใช้ในงานทางทะเล โดยเฉพาะสำหรับตัวเรือและเรือดำน้ำ ตัวอย่างทั่วไปของเหล็กกล้าเหล่านี้คือ 100 HLES, HY-80, HY-100 และอื่น ๆ วิธีการทั่วไปในการตัดเฉือนเหล็กกล้าที่มีความแข็งแรงสูงนั้นอิงตามคำแนะนำเกี่ยวกับเหล็กกล้าอัลลอยด์ที่มีคุณลักษณะด้านความแข็งแรงและความแข็งใกล้เคียงกัน
    • PPSU คืออะไรและมีการตัดเฉือนอย่างไร?
      PPSU เป็นตัวย่อของ polyphenylsulfone ซึ่งเป็นเทอร์โมพลาสติกที่มีอุณหภูมิสูงชนิดหนึ่ง ดังนั้น เมื่อตัดเฉือน PPSU ให้ปฏิบัติตามคำแนะนำของ ISCAR ที่เกี่ยวข้องกับการตัดเทอร์โมพลาสติก
    • เมื่อระบุวัสดุที่จะตัดเฉือน มาตรฐาน ISO จะใช้ตัวอักษร "P" สำหรับเหล็กกล้า "M" สำหรับเหล็กกล้าไร้สนิม และ "K" สำหรับเหล็กหล่อ จดหมายเหล่านี้ไม่เกี่ยวข้องโดยตรงกับเนื้อหา อย่างไรก็ตาม เมื่อกำหนดโลหะที่ไม่ใช่เหล็ก ซุปเปอร์อัลลอย และวัสดุแข็ง มาตรฐาน ISO จะใช้ตัวอักษร "N", "S" และ "H" ซึ่งเป็นตัวย่อที่เหมาะสม คุณช่วยอธิบายเหตุผลได้ไหม?
      ISO นำหลักการจำแนกประเภทวัสดุที่พัฒนาขึ้นในเยอรมนีมาใช้ ดังนั้นที่มาของจดหมายระบุตัวตนจึงเป็นภาษาเยอรมัน ตัวอย่างเช่น ตัวอักษร "P" เกี่ยวข้องกับคำภาษาเยอรมันเพียงไม่กี่ชื่อ «Plastisch» (พลาสติก), "K" ถึง «Kurzspanend» (ผลิตเศษสั้น) และ "H" ถึง "Hart" (แข็ง)
    • เหตุใด ISCAR จึงยังคงใช้การกำหนดที่ล้าสมัย เช่น GGG สำหรับเหล็กหล่อเม็ดกลม เมื่อระบุวัสดุทางวิศวกรรมในคู่มือต่าง ๆ และซอฟต์แวร์ ITA
      คำตอบนั้นง่ายมาก การกำหนดที่ล้าสมัยยังคงพบเห็นได้ทั่วไปในอุตสาหกรรมและถูกใช้โดยผู้ผลิต การกำหนดที่ขึ้นต้นด้วย "GG" สำหรับเหล็กหล่อสีเทา "GGG" สำหรับเหล็กหล่อเม็ดกลม (ตามมาตรฐาน DIN แบบเก่า) หรือ "En" สำหรับเหล็กกล้า (ตามมาตรฐาน BS แบบเก่า) ได้ถูกแทนที่ด้วยการกำหนดอื่น ๆ ใน มาตรฐานที่เหมาะสมของตน อย่างไรก็ตาม แม้จะมีการเปลี่ยนแปลงที่ใหม่กว่าและเป็นทางการ แต่การกำหนดเนื้อหาที่ล้าสมัยต่าง ๆ เป็นภาษาที่ใช้ในชีวิตประจำวันของโลกแห่งมืออาชีพ ดังนั้นการกำหนดชื่อที่ทันสมัยจึงได้รับการเก็บรักษาไว้พร้อม ๆ กันโดยมีการกำหนดที่ล้าสมัยสองสามรายการซึ่งยังคงได้รับความนิยมในหมู่ผู้เชี่ยวชาญด้านการผลิต ในสถานการณ์ที่คล้ายคลึงกันอาจสังเกตได้จากชื่อทางการค้า วัสดุบางอย่างเป็นที่รู้จักดีจากเครื่องหมายการค้าและไม่ใช่โดยการกำหนดมาตรฐาน
    • อลูมิเนียมอุณหภูมิสูงเรียกว่าอะไร?
      โดยทั่วไป อะลูมิเนียมอุณหภูมิสูงเป็นโลหะผสมอะลูมิเนียมที่มีปริมาณซิลิกอนมากกว่า 12% อะลูมิเนียมอัลลอยนี้เป็นไฮเปอร์ยูเทคติก (เรียกอีกอย่างว่า "อะลูมิเนียมไฮเปอร์ยูเทคติก") ในขณะที่การขยายตัวทางความร้อนต่ำและความถ่วงจำเพาะต่ำทำให้โลหะผสมนี้เป็นวัสดุทั่วไปสำหรับลูกสูบไฮเปอร์ยูเทคติก จากมุมมองของความสามารถในการแปรรูป อะลูมิเนียมอุณหภูมิสูงมีคุณสมบัติการเสียดสีค่อนข้างมาก
    • “เหล็กบริสุทธิ์” คืออะไร และสามารถกลึงได้อย่างไร?
      เหล็กบริสุทธิ์เป็นชื่อทั่วไปของเหล็กกล้าผสมคาร์บอนต่ำที่มีปริมาณเหล็ก (Fe) สูงมาก โดยมีองค์ประกอบทางเคมีอื่น ๆ โดยรวมสูงถึง 0.1% เหล็กบริสุทธิ์ถูกเรียกในเชิงพาณิชย์ว่า ARMCO (บริษัท American Rolling Mill Corporation) เหล็กบริสุทธิ์ ในขณะที่ภาษาพูดในร้านค้าหมายถึง "Armco-Iron" สำหรับการตัดเฉือนเหล็กบริสุทธิ์ ขอแนะนำให้ปฏิบัติตาม ISCAR Group 1 (P1) - การจำแนกกลุ่มวัสดุ เมื่อเลือกเครื่องมือตัดที่เหมาะสมและกำหนดข้อมูลการตัดเบื้องต้น
    • How to distinguish cold-rolled and hot-rolled steels by their designation?
      Terms "hot rolled" or "cold rolled" relate to steel fabrication methods, and do not specify the composition or the mechanical properties of a steel, which are generally the main parameters for steel designation systems. However, in some cases technical documentation may use these terms or their abbreviations such as HR or CR for highlighting the method of fabrication.
    • High temperature superalloys comprise several types of materials. How can the machinability of these materials vary depending on the material type?
      High temperature superalloys (HTSA) are divided into the three following groups depending on the prevailing element: iron (Fe)-, nickel (Ni)- and cobalt (Co)-based superalloys. Generally, machinability drops in the same order: from Fe- to Co-based HTSA. In addition, material fabrication method (casting, forging, sintering etc.) have impact on machinability within the group, too.
    • From the machinability point of view, are iron-based high temperature superalloys comparable with difficult-to-cut austenitic stainless steels?
      Yes, correct.
    • อะไรคือ “ เหล็ก CPM”
      อักษรย่อ "CPM" หมายถึง โลหะวิทยาของอนุภาคในเบ้าหลอม – วิธีการทำโลหะผงของการผลิตเหล็กที่พัฒนาโดย Crucible Industries
    • วิธีการกลึงอลูมินาเซรามิกส์ ทำได้อย่างไร?
      อลูมินาเซรามิกส์เป็นชื่อทั่วไปสำหรับทั้งกลุ่มของวัสดุเซรามิกที่มีอะลูมิเนียมออกไซด์เป็นหลัก ซึ่งมีเปอร์เซ็นต์อะลูมิเนียมออกไซด์ (อลูมินา) แตกต่างกันและมีคุณสมบัติที่สำคัญ เนื่องจากความแข็งสูงและค่าการนำความร้อนต่ำ วิธีการทั่วไปในการตัดเฉือนอลูมินาเซรามิกส์คือการกัดเซาะ การตัดเฉือนด้วยไฟฟ้า การตัดด้วยเลเซอร์ช่วย และอื่นๆ สำหรับการตัดแบบ "ดั้งเดิม" การใช้เครื่องมือคาร์ไบด์มักจะต้องใช้เครื่องมือที่เคลือบด้วยเพชร ในเวลาเดียวกัน เกรด Alumina Ceramics ที่มีความแข็งค่อนข้างต่ำ (ประมาณ 85 Shore D) อาจถูกตัดเฉือนด้วยเครื่องมือคาร์ไบด์เคลือบทั่วไป
    • "cupronickel" และความสามารถในการแปรรูปคืออะไร?
      Cupronickel ซึ่งเรียกอีกอย่างว่า "ทองแดงนิกเกิล" "นิกเกิลทองแดง" และ " cupro-nickel " เป็นโลหะผสมแบบคูเปอร์ที่มีนิกเกิลเป็นองค์ประกอบการผสมหลัก ความสามารถในการแปรรูปของ Cupronickel ต่ำเมื่อเทียบกับโลหะผสมทองแดงทั่วไป
    • "เหล็กกล้าคาร์บอนสูงพิเศษ" คืออะไร?
      ในระบบการจำแนกประเภทเหล็กบางระบบ เหล็กกล้าคาร์บอนสูงที่อุดมไปด้วยคาร์บอนมาก (ปกติจะเกิน 1% แต่ขึ้นอยู่กับระบบ) จะถูกตั้งชื่อว่า "ultra-high carbon" คำจำกัดความ เช่น "เหล็กกล้า UHC" หรือ "เหล็กกล้าคาร์บอนสูงมาก" และตัวย่อ "UHCS" เป็นเรื่องปกติสำหรับการกำหนดเหล็กกล้าดังกล่าว เหล็กกล้าคาร์บอนสูงพิเศษมีความแข็งแรงเพิ่มขึ้นแต่ยังเปราะ
    • เหล็กกล้าไร้สนิมกลุ่มใดที่ตกตะกอนความแข็ง (PH) สแตนเลสเป็นของ: มาร์เทนซิติกหรือออสเทนนิติก
      เหล็กกล้าไร้สนิมชุบแข็งแบบตกตะกอนสามารถเป็นได้ทั้งแบบมาร์เทนซิติกและออสเทนนิติก อย่างไรก็ตาม เหล็กประเภทที่พบมากที่สุดคือมาร์เทนซิติก นอกจากนี้ยังมีเหล็กกล้าไร้สนิมชุบแข็งกึ่งออสเทนนิติก ซึ่งเป็นออสเทนนิติกเมื่ออบอ่อน และมาร์เทนซิติกเมื่อชุบแข็ง
    • เหล็กหล่อเหนียวออสเทมเปอร์ (ADI) และเหล็กหล่อออสเตนนิติกเป็นก้อนกลมเป็นวัสดุเดียวกันหรือไม่?
      ไม่ใช่ วัสดุเหล่านี้เป็นเหล็กหล่อประเภทต่าง ๆ
    • อะไรคือ K-Alloy?
      K-Alloy เป็นโลหะผสมอะลูมิเนียมหล่อขึ้นรูปที่ทนทานซึ่งมีความทนทานต่อการกัดกร่อนสูง K-Alloy เรียกอีกอย่างว่า A304
    • เหล็กกล้าตัดฟรีคืออะไร?
      เหล็กกล้าตัดฟรี (หรือการตัดเฉือนแบบอิสระ) เป็นชื่อรวมของเหล็กกล้าคาร์บอนที่มีปริมาณกำมะถันที่เพิ่มขึ้นเมื่อเปรียบเทียบกับคาร์บอนทั่วไปที่มีเปอร์เซ็นต์คาร์บอนใกล้เคียงกัน คุณลักษณะนี้ทำให้สามารถแปรรูปและควบคุมเศษได้ดีขึ้น
    • What is Tungsten-Copper and how to machine it?
      Tungsten-Copper, which is also referred to as Copper-Tungsten, CuW, and WCu, is a composite material, a pseudo alloy, that contains Copper and Tungsten (Wolfram). Depending on the grade, the content of Copper (Cu) in this material typically varies between 10-50%. When compared to pure Tungsten, machining Copper-Tungsten is easier, and the higher the copper content, the better the machinability. Often the machinability of Copper-Tungsten alloys is like grey cast iron. However, effective machining of CuW grades with high copper percentage requires a more positive cutting geometry.
    • What is the difference between carbon steel and non-alloy steel?
      The definitions "carbon steel", "non-alloy steel", and "unalloyed steel" relate to the classification of steel based on its chemical content. Generally, these definitions are considered synonymous. Steel is an alloy of iron and carbon that can also contain various alloying elements to enhance its properties. Steel is produced by smelting iron ore. During the smelting process, alloying elements can be added to steel, resulting in different grades of alloyed steel depending on the percentage of the added element. In the case of carbon (non-alloy, unalloyed) steel, no alloying element is added during smelting, making it a simple alloy of iron and carbon only. However, since iron ore is not completely pure, small quantities or traces of various elements are present in this alloy. National and international standards define the maximum allowable percentage of these elements to classify a steel grade as carbon steel.
    • What is the difference between brass and bronze?
      Both brass and bronze are copper alloys, but brass is a group of copper-zinc alloys, while bronze is a group of copper-tin alloys.
    • What is electrical steel?
      Electrical steel, also known as silicon steel, transformer steel, or e-steel, is an iron-silicon alloy, distinct from ordinary steel that is an iron-carbon alloy. The silicon content in common cold-rolled electrical steel typically does not exceed 3.2%, while in hot-rolled electrical steel, it can be higher, generally capped at 4.5%. Electric steel is commonly manufactured in the form of thin sheets, coils, and plates, and is often machined in stacks. It is worth noting that this steel is frequently delivered with an isolation layer.
    • What is the difference between "high temperature superalloys (HTSA)" and "heat resistant superalloys (HRSA)"?
      Both definitions - "high temperature superalloys" and "heat resistant superalloys" - relate to alloys specifically intended for use in high temperature environments. Essentially, these terms describe alloys that possess high-temperature properties and can withstand elevated temperatures without significant degradation. Therefore, these terms are often used interchangeably in various contexts, but strictly speaking, there are some differences between the two.
      "High temperature superalloys" (HTSA) generally refer to alloys designed to maintain their strength and mechanical properties at extremely high temperatures, typically above 1000°C (1832°F). These alloys are used in applications such as gas turbines, jet engines, and rocket propulsion systems.
      On the other hand, "heat resistant superalloys" (HRSA) usually relate to alloys that exhibit good resistance to deformation and retain their mechanical properties at elevated temperatures ranging from 650°C (1202°F) to 1000°C (1832°F). These alloys are typically used in applications like heat exchangers, furnaces, and automotive components.
    • What is "Blue Brass"?
      More accurately referred to as "BlueBrass", this is a commercial name for a family of lead-free brass alloys. These alloys typically consist of 56-65% copper (Cu), with the remainder being zinc (Zn), supplemented by traces of other elements.
    • What is "Muntz Metal"?
      Muntz Metal is a brass alloy, consisting of around 60% copper (Cu) and 40% zinc (Zn), with traces of iron (Fe) and other impurities. This alloy is also known as Yellow Metal, 60/40 brass, and is sometimes referred to as "Muntz" in shop talk. The alloy's name originates from George Muntz, the English manufacturer George Muntz who developed this alloy.
    • What is ultra-low carbon steel?
      Ultra-low carbon (ULC) steel is a type of steel with a carbon content usually less than 0.005%. This steel, which is primarily composed of iron, has the lowest strength but the highest formability compared to other types of steel. Due to its formable nature, ULC steel is also referred to as deep drawing steel (DDS).
    • What is the machinability of Molybdenum-Copper alloys?
      Molybdenum-Copper (Mo-Cu) alloys encompass a range of materials where the Molybdenum (Mo) content varies significantly, typically from 15% to over 70%. These alloys generally have better machinability when compared to pure Molybdenum; however, machinability decreases as the Mo content increases - the higher the Mo content, the more challenging it is to machine.
      The general instructions for machining Mo-Cu alloys are outlined below:
      • If the Mo content is relatively low (around 15-30%), follow the recommendations for machining Copper alloys, with an appropriate reduction in cutting speed (vc) by 20-30%.
      • For higher Mo percentages (over 30%), use tools with cutting geometry suitable for machining low alloy steel. Additionally, the initial cutting speed (vc) should be decreased by approximately 20% to 40% when compared to the recommendations for machining low alloy steel, depending on the Mo content.
    • What is Magnalium and how to machine it?
      Magnalium is a general name for a group of aluminum alloys containing Magnesium as the main alloying element. The Magnesium content can vary widely, from 5% to 50%, which influences the properties of the alloy. The machinability of Magnalium lies between that of Aluminum and Magnesium, depending on their respective percentages in a specific alloy grade. The addition of Magnesium increases the strength of the alloy but affects machinability. It is important to note that Magnesium chips are flammable. Therefore, when machining Magnalium with higher Magnesium content, fire precautions such as cooling, chip disposal, and chip handling should be prioritized.
    • What is "Damascus steel" and which steel grade is equivalent to it?
      "Damascus steel" is a general term for crucible steel that was used for making sword blades in the medieval Orient, featuring a patterned ("damask") surface. The typical hardness of Damascus steel is more than HRC 55. The distinct process of producing Damascus steel was lost in history, and several theories exist about how the steel was made. Various modern reproductions of this steel, particularly for producing knives, sometimes use the original name. From a machinability point of view, high carbon steels such as DIN/EN 75Ni8 (W.-Nr. 1.5634) or AISI/SAE 1075 and 1095 can be appropriate references.
    • What is Ultem and how is it machined?
      Ultem is a brand name for a family of Polyetherimide (PEI) thermoplastics. Some Ultem grades, such as Ultem 1000 and Ultem 1100, are unreinforced (plain plastics), while others, like Ultem 4000, are reinforced with fillers like glass fibers. Therefore, to select the most appropriate tools for machining Ultem material grades and to find initial cutting data, it is recommended to follow ISCAR's guidelines specific to each plastic type.
    • How to machine MARS protection steel?

      MARS is the commercial name for a group of bulletproof steel grades (e.g., MARS® 280, MARS® 380, ..., MARS® 650), with the number indicating the average Brinell hardness. Consequently, these steel grades cover a wide spectrum of hardness levels. Additionally, the composition of MARS® steels includes a significant percentage of elements that affect machinability.

      Therefore, selecting the appropriate tools and establishing initial cutting parameters require specific considerations based on the performed machining operations. Usually, steel grade producers provide relevant recommendations in the grade datasheets.

      As a practical rule of thumb, which can be effective for machining difficult-to-cut bulletproof (like MARS) and armor steels: use the same cutting materials, tools, and indexable inserts recommended for machining alloy steels of similar hardness levels. Furthermore, the initial cutting speed should be approximately half (i.e., twice less) of the recommended speed for these alloy steels.

    • Are malleable cast iron and ductile cast iron the same?
      The answer is no.
      These are different types of cast iron with distinctions in their composition, microstructure, mechanical properties, manufacturing processes, and applications.
      Malleable cast iron contains irregular graphite inclusions, whereas ductile cast iron, also known as spheroidal or nodular cast iron, features graphite in the form of nodules or spheroids.
      Regarding machinability, malleable and ductile cast iron have comparable ratings.
      However, malleable cast iron is generally considered somewhat easier to machine when compared to ductile cast iron, although this can vary depending on specific cast iron grades.
    • What are “additive compatible” materials?
      "Additive compatible" materials are those that are suitable for use in additive manufacturing processes, such as 3D printing. These materials possess specific properties that allow them to be deposited, fused, or solidified effectively in a layer-by-layer technique to produce the desired object.
    • What is silicon brass and what is its machinability?
      Silicon brass is a type of brass that contains silicon (typically up to 6%) to improve strength and resistance to corrosion. The machinability rating of silicon brass is 20–30% lower when compared to free-cutting (leaded) brass. Generally, the machinability of silicon brass is roughly comparable to that of lead-free brass.
    • What is aircraft quality steel and what its machinability?

      Aircraft quality steel is a term used to describe various steel grades that are utilized in critical components of aircraft structures and meet the strict standards of the aerospace industry. These standards cover mechanical properties such as strength, hardness, and corrosion resistance, as well as metallurgical characteristics like controlled composition, optimized microstructure, and high purity.

      In general, when compared to non-aircraft steels of similar composition, aircraft quality steel tends to have lower machinability. This is primarily due to its higher strength and hardness, which are required by aerospace performance and safety norms and specifications.

    • What is Titanium Aluminide and how to machine it?
      Titanium Aluminide, often referred to as TiAl or Ti-Al, is a general term for a group of intermetallic compounds made from titanium (Ti) and aluminum (Al).
      This group is represented by three main chemical combinations, but in industry, especially in aerospace engine manufacturing, the term “Titanium Aluminide” typically refers to gamma TiAl (γ-TiAl).
      TiAl consists of approximately equal proportions of titanium and aluminum.
      Compared to common titanium alloys, TiAl is significantly harder and more abrasive, which results in lower machinability.
      As a general guideline, when machining TiAl, the cutting speed should be set at about one third of the recommended cutting speed for standard titanium alloys, such as Ti-6Al-4V, for similar operations.
      To enhance performance and extend tool life, it is advisable to use small radial and axial widths of cut.
      Utilizing tools with diamond-coated carbide cutting parts, as well as employing machining methods like high speed machining (HSM), high-pressure cooling (HPC), and minimum quantity lubrication (MQL), can enable a significant increase in cutting speeds - up to three times or more in some cases.
      Tool Holding
    • What is a tool holder?
      A tool holder is a device (a tool arrangement) for mounting a cutting tool in a machine tool. One of the tool holder ends carries the cutting tool while the other ends is clamped into the machine tool. Therefore the tool holder acts as an interface between the machine tool and the cutting tool.
    • Are the terms “tool holding” and “tooling” synonymous?
      “Tool holding” is also referred to as “toolholding” and usually relates to tool holding systems that comprise various tool holders, such as arbors, chucks or adaptors, and their accessories (extensions, reducers, rings, sleeves, etc).
      “Tooling” is a much broader definition. “Tooling” can refer to cutting tools together with tool- and work holding arrangements that are intended for a machine tool. “Tooling” relates sometimes to tool management and in certain circumstances it refers to tool holding systems.
    • Does ISCAR supply work holding devices?
      No, ISCAR does not supply work holding devices. ISCAR’s products are cutting tools, tool holding, and tool management systems.
    • Does ISCAR provide tool holders with polygonal taper shank?
      Yes. These tool holders are represented by ISCAR’s CAMFIX family.
    • What are the advantages of thermal (heat) shrink holders?
      The advantages of tool holding, based on clamping tools with cylindrical shanks with the use of heat shrink fitting, are as follows:
      • High accuracy
      • High rigidity
      • Excellent repeatability
      • Reaches deep cavities due to slim holder design
      • Balanced design and assembly’s symmetrical shape eliminate the production of centrifugal forces at high rotational speeds
    • Are ISCAR’s thermal shrink holders suitable for tools with steel shanks?
      Yes. ISCAR’s SRKIN thermal shrink holders are intended for clamping tools with shanks made from cemented carbide, high speed steel (HSS) and steel. The SRKIN product line is fitted DIN69882-8, which is the shrink holder market standard.
      ISCAR also produces SRK slim design shrink holders. SRK holders can be used for steel shanks but we recommend using them for carbide shanks.
    • Does ISCAR produce heating units for mounting cutting tools in thermal shrink holders?
      Yes, ISCAR produces the induction heating unit for thermal shrink tool holding. In addition to this unit, ISCAR provides its simplified, “starter” version, which was designed to help the end-user purchase the shrink holding technology in a low cost device.
    • What are the main design features of X-STREAM SHRINKIN products? In which field would applying these products be the most effective?
      X-STREAM SHRINKIN is a family of thermal shrink chucks with coolant jet channels along the shank bore. The family utilizes a patented design for holding tools with shanks, made from cemented carbide, steel or high-speed steel (HSS). The new chucks combine the advantages of high-precision heat shrink clamping with coolant flow, directed to cutting edges. X-STREAM SHRINKIN has already shown excellent performance in milling aerospace parts, particularly titanium blades and blisks (bladed discs), and especially in high speed milling. In machining deep cavities, the efficient cooling provided by the new chucks substantially improves chip evacuation and diminishes chip re-cutting.
    • What are the SPINJET products and where they are used?
      ISCAR’s SPINJET is a family of coolant-driven compact high speed spindles for small diameter tools. It is a type of “booster” for upgrading existing machines to high speed performers. Depending on pressure and coolant flow rate, the spindles maintain a rotational speed of up to 55000 rpm. The versatile SPINJET products have been successfully integrated in tooling solutions for milling, drilling, thread milling, engraving, chamfering, deburring, and even fine radial grinding. The SPINJET spindles are recommended for tools up to 7 mm (.275 in) in diameter, however the optimal diameter range is 0.5-4 mm (.020-.157 in).
    • Does ISCAR deliver tool holders with identification chips?
      ISCAR’s tool holders with HSK shanks incorporate holes for radio-frequency identification chips (RFID). ISCAR’s CAMFIX tool holders with polygonal taper shank of nominal size C4 (32 as specified by ISO 26623-1) and more are produced with this hole.
      ISCAR can provide RFID chip mounting for all types of tool holder by special request.
      Note: It is essential to adjust the tool holder after mounting an RFID chip.
    • Does ISCAR supply boring heads with digital displays?
      Yes. ISCAR’s ITSBORE family contains adjustable boring heads with digital displays. These heads feature high adjusting accuracy and a simple adjusting process. A clear digital display with a mm/inch value display selection helps to prevent human errors.
    • What is the difference between mandrel and arbor?
      There is no fundamental difference - both terms refer to a bar, usually rotating, that is used for mounting a machined workpiece or a cutting tool.
    • Does ISCAR supply tool holding devices for tapping?
      Yes. Tool holding products for tapping include quick-change ER-type collets, holders with straight shanks and with 7:24 taper shanks, for example:
      • GTI toolholders and straight shanks with floating compression/tension mechanism
      • GTIN compact product line for tappng based on ER collets
      • TCS/TCC quick-change system (part of the ITSBORE modular system)
    • What is "engineered balance"?
      Engineered balance is a general name for design methods to make the mass distribution of a rotary body theoretically symmetrical with the body axis. Using these methods, engineers tried to ensure required balance parameters in the design stage, before production. 3D modelling in a CAD system environment significantly expands the engineered balance possibilities. As the engineered balance relates to virtual objects, it cannot replace a "physical" balancing of real parts. However, an engineered balance design substantially diminishes the mass unbalance of a future product and makes "physical" balancing much easier.
      Engineered balance principles are a necessary feature for a skillful design of rotary tool holders.
      Products with an engineered balance design are sometimes referred to as "balanced by design".
      ศัพท์สแลงในสายงานผลิต
    • Metal cutting, like other fields of industrial activity, has its own professional jargon that is often used in shop talk. We decided to devote a separate section to more common jargon, even though they may appear already in the other FAQ sections.

      Dish- ระยะห่างเชิงมุมซึ่งทำบนมีดกัดที่หันไปทางแกนมีดกัด เพื่อสร้างพื้นผิวที่เรียบ จานถูกกำหนดโดยมุมของจาน- มุมระหว่างคมตัดย่อยของมีดเอ็นมิลล์กับระนาบปกติถึงแกน การออกแบบแนวคิดจานเป็นเรื่องปกติสำหรับมีดกัด อย่างไรก็ตามมีดเอ็นมิลล์ก้นแบนยังมีมุมจานเป็นศูนย์

      Exotics- วัสดุแปลกใหม่

      Fluting- การตัดเฉือนงานเซาะร่อง, ส่วนใหญ่เป็นเกลียว

      High speed cobalt- เหล็กกล้าความเร็วสูงที่มีปริมาณโคบอลต์เพิ่มขึ้นอย่างมาก (โดยทั่วไปคือ 5 ถึง 8%) เหล็กนี้เรียกอีกอย่างว่าเหล็กโคบอลต์

      Nasty material- วัสดุที่ยากต่อการตัด มักย่อมาจากซูเปอร์อัลลอยที่มีนิกเกิลหรือโคบอลต์

      เปลือกส้ม ผิวส้ม- พื้นผิวที่ไม่เรียบที่มองเห็นได้ของพื้นผิววัสดุ ซึ่งคล้ายกับผิวเปลือกส้ม ในงานโลหะ มักถูกมองว่าเป็นข้อบกพร่องด้านรูปลักษณ์ แม้ว่าในบางกรณี "เปลือกส้ม" อาจเป็นประเภทการตกแต่งผิวที่กำหนดไว้เป็นพิเศษ

      SiMo, SiMo iron- เหล็กหล่อเหนียวเฟอริติก (เป็นก้อนกลม) ซึ่งผสมด้วยซิลิคอนและโมลิบดีนัม มีคุณสมบัติต้านทานการเกิดออกซิเดชันในอุณหภูมิสูง ดังนั้นจึงใช้เป็นหลักในการผลิตชิ้นส่วนของระบบไอเสียรถยนต์และเทอร์โบชาร์จเจอร์

      ความเร็วพื้นผิว- ความเร็วการตัด

      มุมตัด – ขอบตัด โดยทั่วไป ของเม็ดมีดกลึง

      GDT – ในการผลิต การวัดขนาดทางเรขาคณิตและความคลาดเคลื่อน

      เครื่องมือรอบ – โดยปกติแล้ว การหมุนเครื่องมือที่เป็นของแข็ง

      Shop-Talk Professional slang
    • 6 and 9
      - The shapes of curled chips, which are usually short, are often considered the most desirable in production.
    • Asymmetrical index
      - This is the unequal angular pitch of a milling cutter.
    • Back taper
      - Small reduction of the tool cutting diameter from the front to the rear along the tool length.
    • BAHCO
      - Swedish company founded by Johan Petter Johansson, inventor of the plumber pipe wrench. Today, the word "Bahco" is also used as a slang term for an adjustable pipe wrench.
    • Ball-end tool
      – A ball-nose tool.
    • Ball mill
      – A ball-nose milling cutter. The correct meaning of “ball mill” is a grinding device for grinding materials into powder.
    • Barrel
      - A barrel-shape milling cutter.
    • Bird`s nest, birds-nest chips
      - A clump of entangled metal swarf formed by long unbroken chips during the machining process.
    • "Black" and "white" cutting ceramics
      – A commonly used classification of ceramic cutting materials according to their color. Pure alumina-based cutting ceramics are "white," while mixed ceramics comprising a composition of alumina with titanium carbide are "black".
    • Bell mouth
      - Constant-velocity joint (CV joint).
    • Bull-nose
      – A milling cutter, a replaceable milling head or insert of toroidal cutting profile.
    • Button cutter
      – A toroidal milling tool. In most cases, a button cutter is referred to as a mill with indexable round (button) inserts.
    • Chip mouth, chip throat, chip slot and chip gullet
      - These terms relate to the area of a cutting tool designed for chip flow during machining. The chip mouth and chip throat are usually shaped holes, and the chip gullet is a groove. In rotating tools, the terms "chip mouth" and "chip throat" are more common in hole making, while the terms "chip slot" and "chip gullet" are used more in milling.
    • Cobalt chrome
      – A cobalt-chrome alloy.
    • Cobalt steel
      – In the past this definition related mainly to AISI M35 high speed steel (HSS) but now is commonly used for designating HSS containing cobalt.
    • Comb Cracks
      – Cracks that are usually normal at the cutting edge of a tool, caused mainly by variable thermal loading.
    • Coupon
      – A test sample.
    • Corn (corncob) milling cutter
      – A milling cutter, mainly in an endmill configuration, which features the outer surface having a dense but usually shallow mesh structure. The milling cutters of this type are also known as scaly mills.
    • Crest Cut End Mill
      - Slang term derived from "CREST-KUT®" end mills; refers to a specific design featuring a wavy cutting edge, which was initially introduced for high speed steel milling cutters.
    • Cubic
      – Metal removal rate (MRR) in cubic mm, cm or inches.
    • Cutter sweep
      – In cutting tools with flutes such as endmills, drills, reamers etc., this is the area of material that is removed by a fluting tool (a milling cutter or a grinding wheel) at the end of a flute. The cutter sweep is also referred to as a "flute runout" - not to be confused with the runout of tool teeth!
    • Cutting corner
      - Cutting edge, normally, of turning inserts.
    • Decking
      - Machining the gasket-surface sections ("decks") of an engine block or/and a cylinder head to assure a required level of flatness.
    • Die sinking
      – In die and mold making, this means machining 3D cavities, especially deep cavities.
    • Dish
      – An angular clearance, which is made on an endmill face toward the endmill axis, to generate a flat surface. A dish is defined by a dish angle - the angle between the endmill minor cutting edge and a plane normal to the axis. A dish-concept design is common for endmills. However, flat bottom endmills feature zero dish angles.
    • DN ratio
      – The product of the diameter of a main spindle bore and the maximum spindle speed. DN ratio, which is also referred to as "DN number", is often used as a criterium of high-speed machining (HSM).
    • Duplex
      – Duplex (austenitic-ferritic) stainless steel.
    • Exotics
      – Exotic materials.
    • Facing, profiling, shouldering
      – In turning, these terms are used for specifying typical turning operations. In milling, they are "shop talk" words used instead of the full terms "face milling", "profile milling" and "shoulder milling".
    • Feed mill
      – A fast feed (high feed) milling cutter.
    • Fishtail cutter
      - A flat milling cutter for machining slots. Normally, such a cutter possesses a V-shape- or V-neck end. Sometimes, back draft endmills are referred to as fishtail cutters too.
    • Flat drill
      – Normally, this is a synonym for a spade drill, but it often relates to a flat-bottom drill.
    • Flood coolant
      - A cutting fluid that is supplied to a cutting zone from outside (externally) by a low-pressure jet nozzle.
    • Flute wash, flute washout
      - In cutting tools with flutes, this is the non-cutting section of a flute outside the maximum length of cut also referred to as the flute run-out.
    • Fluting
      – Machining grooves, mainly spiral.
    • Fly bar, flybar
      – A fly cutter carrying two toolbit inserts.
    • Gamma titanium
      – Titanium aluminide.
    • Gamma titanium
      – Titanium aluminide.
    • GDT
      – In manufacturing, Geometric Dimensioning and Tolerancing.
    • Hard carbon
      – Diamond-like carbon (DLC) coating.
    • Hard tooling
      – Custom tooling; also referred to as dedicated or special-purpose tooling.
    • Herringbone
      – A herringbone-type milling cutter is usually a solid carbide endmill that features flutes combining left and right helix angles. Herringbone-type endmills are commonly used in machining composites, especially carbon fiber materials, where the left and right helix combination reduces delamination and compresses the material edges. Also referred to as a compression router.
    • High positive
      – A feature of cutting geometry that relates mainly to the rake angle of a tool. For tools with high positive geometry, the rake angle is significantly greater than common values.
    • High speed cobalt
      – A high speed steel with significantly increased content of Cobalt (typically 5 to 8%). This steel is also referred to as cobalt steel.
    • Hook, hook angle
      – A rake angle; as a rule, this term is referenced to saws and slitting cutters.
    • Hundredths, thousandths etc.
      - Hundredths, thousandths etc. of a millimeter or an inch depending on a chosen system of units.
    • IC
      – The inscribed circle of an indexable insert relates to the diameter of such a circle. Also, IC stands for "ISCAR Carbide" in designations of ISCAR`s cemented carbide grades.
    • Inconel
      – Inconel is the trade name for a group of more than 20 metal alloys made by Special Metals Corporation. When followed by a number (e.g. Inconel 625), it is a specific material from a family of nickel-chromium-based high temperature alloys. Without a number following, Inconel often refers to a whole group of nickel-based superalloys.
    • Inox
      – Inox steel is a stainless steel. The term "Inox" comes from "inoxydable", the French word for stainless or inoxidizable.
    • Jo, Jo block
      - A gauge (Johansson) block.
    • Jobber drill
      – An all-purpose twist drill, usually of medium length.
    • K-factor
      – In cutting tools, K-factor may stand for the following: - Cutting edge form factor, which is the ratio of honed cutting-edge widths measured on a rake face and a flank. - Specific power factor (or power unit factor). Usually, this is the power (in kW, hp etc.), required to remove a unit volume of a specific material (in cm3, in3, for example) by cutting. However, in some cases this factor is determined in the opposite way, resulting in material volume to be removed by cutting when a unit power is applied.
    • Ledloy, Ledloy steel
      - A grade of free cutting carbon steel that is commonly known by its trade name ("Ledloy" the copyright name of the Inland Steel Company`s steel). The grade designation according to AISI is 12L14, a similar DIN/EN steel is 11SMnPb37 (W.-Nr. 1.0737). To improve machinability, lead is added to the steel composition. Therefore, this steel is often referred to as Lead Steel or mistakenly as Leadloy.
    • Lens
      – An endmill with a convex cutting face (bottom) profile that is represented by the arc of a large-radius circle.
    • Lollipop
      – A spherical milling cutter that features the wrapping angle of a cutting edge more than 180° (usually 220-240°). Sometimes, the lollipop cutter is also referred to as an undercutting mill or a bulb-type (bulb-shaped) mill.
    • Master (gauge) insert
      – A specially selected insertmounted on a cutting tool to measure the tool dimensions or to check the tool accuracy parameters.
    • Mill
      – Usually, a milling cutter but also may relate to a milling machine tool.
    • Moly
      – Molybdenum [Mo]. Moly has an exceptionally high melting point and is mainly used as an alloy agent in steel.
    • Necking, necking down
      – Machining a neck or undercut on a rotary-body-type part such as a shaft, axle etc.
    • Necked-down endmill
      – An endmill with the shank diameter larger than the cutting diameter.
    • Nasty material
      – A difficult-to-cut material; often stands for a nickel- or cobalt-based superalloy.
    • Nirosta
      – Stainless steel, normally austenitic.
    • OD/ID machining
      - Machining external/internal cylindrical surfaces: "OD" refers to "outer diameter" and "ID" to "inner diameter".
    • Orange peel, orange skin
      – The visually uneven texture of a material surface, which resembles the skin of an orange. In metalworking, it is often considered as an appearance defect, although in some cases an "orange peel" may be a specially planned type of decorative finish.
    • Parallel land
      – The wiper flat of a milling cutter. The term "parallel" highlights that the land is generally parallel to the machined surface.
    • Pecking
      – Drilling or countersinking with peck feed.
    • Pic rail cutter
      – A milling cutter that is intended for machining the standard Picatinny rail profiles (male and female). "Picatinny rail cutter" or "Picatinny rail form cutter" are more common and more of an official description for such a cutter.
    • Pig
      – Ingot. Usually, term "pig" relates to an ingot from ferrous metals.
    • Plunger
      – A plunge milling cutter.
    • Plunging
      - Plunge milling.
    • Pocketing
      – Milling pockets and cavities, specifically deep cavities.
    • Porky
      (porcupine) – An extended flute (long-edge) indexable milling cutter
    • Port tool, porting tool
      - A stepped rotary cutting tool for machining a pre-drilled hole to generate a complex inner shape in one operation with axial feed, ensuring required parameters of accuracy and roughness. This tool features high concentricity of stepped cutting edges.
    • Positive insert
      – This may relate to two different features of an indexable insert: 1. Insert where the insert bottom face is smaller than the insert top face. 2. Inclination of the insert cutting edge that generates a positive axial rake of a tool, when the insert is mounted in the tool. This dual meaning sometimes causes serious misunderstandings.
    • PH
      - Precipitation hardening stainless steel.
    • Rapid steel
      - An obsolete name for high-speed steel (HSS).
    • Rapid tooling
      - A general name for shortcuts of tool making, usually connected with additive manufacturing (AM) methods.
    • Ribbing
      - In metal cutting, machining ribs, usually by endmills.
    • Rotabroach drill or simply "Rotabroach"
      – A trepanning cutting tool (an annular cutter). The origin of "Rotabroach" comes from the company Rotabroach Ltd, who started manufacturing and marketing such tools in the 1980’s.
    • Round tool
      - Usually, rotating solid tools.
    • Ruthenium, ruthenium grade
      - A cemented carbide alloyed with ruthenium.
    • Sandwich
      – A sandwich-structured composite material that features a core faced by outer layers.
    • Segment mills, circle-segment mills
      – A general name of profile milling cutters with large-radius cutting edges such as barrel-, lens- and ovel-shape endmills.
    • Scalloped edge
      – A serrated cutting edge.
    • Serrated edge
      – Tool or insert cutting edge with a serrated or wavy shape to ensure chip splitting action that achieves small short segment chips. Serrated cutting edge is also referred to as "scalloped cutting edge" and "knurled cutting edge".
    • Shear milling cutter
      – A milling cutter with negative-positive cutting geometry: negative radial and positive axial rake angles.
    • SiMo, SiMo iron
      – A ferritic ductile (nodular) cast iron, which is alloyed by Silicon and Molybdenum. It features increased resistance to oxidation in high temperatures and therefore used mainly for producing parts of automobile exhaust systems and turbochargers.
    • Slicing
      – Peel milling.
    • Slocombe (Slocomb) drill
      – A center drill.
    • Slotter
      – In milling, this term defines slot milling cutter; however it normally refers to a type of planing machine tool.
    • Slotting
      – Originally, this term defined a machining process where a single-point cutting tool moves linearly and piston wise, and a workpiece is fixed or moves only in linear direction. However, today this term relates more to slot milling.
    • Slotting cutter
      – Slot milling cutter (see above)
    • Spanner or wrench
      - Both words mean the same: a tool, mainly operated by hand, for tightening/untightening parts like bolts, nuts etc. or for preventing a rotational movement of the parts. "Spanner" is more common in UK English and "wrench" in US English.
    • Spotting
      - Spot drilling.
    • Superfinish
      - This word is often used for the extremely high surface finish that can be achieved by a cutting tool. The tool may even be referred to as a "superfinisher". Not to be confused with superfinishing, which is a fine abrasive machining process!
    • Sub edge
      - A minor cutting edge.
    • Surface speed
      - Cutting speed.
    • Thrust, thrust force
      - An axial cutting force.
    • TiNite/Tinite
      - Titanium Nitride [TiN]. TiNite is a very hard ceramic material that is used in the protective coating of cutting tools.
    • Titanium beta (?)
      – In most cases it is a beta-annealed ?-?-titanium alloy, although sometimes it means a ?-titanium alloy.
    • Tommy bar
      - A short rod, which is inserted into a hand tool, such as a socket wrench, for using as a lever when rotating the tool.
    • Waterfall edge, waterfall, trumpet
      - An asymmetrically rounded (honed) cutting edge that, when compared with an edge rounded by radius, has an oval-shaped cross-sectional profile. Depending on the profile positioning with reference to the rake and the relief surfaces of a tool, this profile can be "waterfall" and "trumpet" ("reverse waterfall").
    • Weldon
      - The cylindrical shank of a tool (usually a milling cutter) with one or two side flats for clamping and driving. This type of shank was originally introduced by Weldon Tool Co. in the 1920s.
    • Whiskers
      - Whisker-reinforced ceramic.
    • Whistle notch
      - The cylindrical shank of a tool with an inclined side flat for clamping and driving.
    • Zigzag chips
      – Fanfold chips.
      Counterboring and Countersinking
    • What is a zero flute countersink?
      A zero flute countersink is a countersink with a cross through hole that extends through the side of the countersink cone. The intersection of the cone and the hole provides the cutting edge of the countersink. Also referred to as a "cross-hole countersink".
    • Are the cutting speeds for countersinking and drilling equal?
      In countersinking, the cutting speeds are significantly lower when compared to drilling. There is one rule of thumb that is common for machine shop practice: the cutting speed for countersinking is around a third of the cutting speed, recommended for drilling the same material.
    • What are the requirements to the diameter of the hole being counterbored by a counterbore carrying F3B exchangeable three-flute heads?
      The diameter of the hole should meet the two following conditions: (a) it should be no less than 70% of the nominal diameter of the applied F3B head, and (b) it should be at least 2 mm smaller than the F3B head diameter.
    • What is the difference between counterbores and spotfaces?
      When discussing the shape of a hole, both counterbores and spotfaces (more specifically, a counterbore hole and a spotface hole) are cylindrical holes with a flat bottom. However, these holes are designed to perform different functions and must meet varying dimensional and accuracy requirements. Simply put, the distinction between counterbores and spotfaces can be explained as follows: a spotface is essentially a shallow counterbore.
    • Are The Three-Flute LOGIQ-3-CHAM Counterboring Heads Mounted on Existing Tools?
      Yes, they are. These heads are specifically designed to be mounted on existing LOGIQ-3-CHAM tools, transforming them into highly efficient counterbores ─ even when machining cross-holes with inclined surfaces.
      Turning in General
    • What is high feed turning? Does ISCAR produce the tools for this turning application?
      High feed turning, also known as fast feed turning, is a productive machining method that uses a turning tool with a small cutting edge (entering) angle, typically 15-25°, to operate at shallow depths of cut.
      Due to the chip thinning effect produced by these characteristics, high feed turning allows for significantly increased feeds to achieve the required chip thickness.
      This method is usually applied to rough longitudinal turning operations.
      ISCAR’s product portfolio includes tools and indexable inserts specifically engineered to support high feed turning.