Abstract: A center or non-center cutting end mill for orbital drilling of fiber reinforced plastic (FRP) materials includes a shank, a neck, a cutting head and two or more flutes. The end mill has a tool geometry with the following features: a dish angle between about 2 degrees to about 6 degrees; a helix angle between about 5 degrees to about 18 degrees; an end teeth radial rake angle between about 0 degrees and about 15 degrees; a peripheral teeth radial rake angle between about 8 degrees and about 16 degrees; a gashing axial rake angle between about 3 degrees to about 10 degrees; and a primary clearance angle between about 10 degrees to about 18 degrees. The end mill is made from a tungsten carbide substrate with cemented cobalt in a range between about 3 to 10 wt. % and a diamond coating having a thickness in a range between about 8 to 20 ?m.

Abstract: In this thread cutting insert, on a common edge section of front and back faces of an insert main body, there is formed a pair of cutting edge sections that project from the edge section when seen from a direction facing the front and back faces, and on at least two of four projecting faces that respectively face the front and back face sides of the pair of these cutting edge sections, there is formed a thread cutting edge with the projecting face serving as a rake face.

Abstract: A milling cutter comprises a shank section joined to a cutting section. The cutting section includes a plurality of peripheral teeth separated by a plurality of flutes to form cutting edges extending around the cutting section in a helix direction. The number of respective teeth and flutes is more than 12.

Abstract: There is described a tool as well as a method for machining a workpiece made of a hard material by means of a geometrically determined blade. In order to obtain an improved surface quality of the machined workpiece when machining such a hard and brittle material, a tool is provided which has a cutting angle of less than 10°. According to the associated machining method, rotational speeds exceeding 1300 rpm are used. There is further described a machine that is to be used in such a tool and is utilized in such a method.

Abstract: A milling tool with an axis of rotation D has a tool shank and a cutter region. The cutter region has a planar cutting edge running approximately perpendicularly to the axis of rotation D and merges peripherally into a main cutting edge and centrally into a secondary cutting edge. The secondary cutting edge is offset rearwardly from the planar cutting edge in the direction of the axis of rotation D. The transitional zone between the planar cutting edge and the secondary cutting edge has a notch produced as a cutting edge portion. The rearmost point of this notch, as seen in an end view in the direction of the axis of rotation D, lies behind the forward-most point of the secondary cutting edge, the angle ? between the planar cutting edge and the adjoining portion of the notch lying in the range of 90° to 175°, and the angle ? between the planar cutting edge and that portion of the notch adjoining the secondary cutting edge lying in the range of 3° to 90°.

Abstract: A rotatable tool includes a shank rotatable about a longitudinal axis, a drawbar mounted to an axial front end of the shank, and a cutting head mounted to an axial front end of the drawbar. The shank and the drawbar include mutually engageable screw threads which impart an axial displacement of the drawbar relative to the shank. The cutting head and the drawbar include mutually engageable serrations for transferring axial force therebetween. The serrations are axially spaced from one another and extend transversely relative to the axis.

Abstract: In the radius end mill, main gash faces has an angle of inclination with respect to an axis that is smaller than a twist angle of chip discharge flutes. The main gash faces are formed on inner circumferential sides of distal end portions of wall surfaces that face in a tool rotation direction of helically twisted chip discharge flutes, which is formed on an outer circumference of a distal end portion of a tool body that is rotated around the axis. End cutting edges are formed on a distal end of the main gash faces. Sub gash faces has an angle of inclination with respect to the axis that is greater than that of the main gash faces. The sub gash faces are formed on an outer circumferential side of the main gash faces such that they extend away via step portions from the main gash faces.

Abstract: An end mill is provided with a plurality of teeth extending helically therealong, and with the teeth notched. The notches interrupt the cutting edge of the teeth at various different positions between a tip of the tooth and a root of the tooth. Various different patterns of notches are disclosed with each notch beneficially followed by a region on a following tooth which is notchless. The notches interrupt an otherwise flat cutting edge so that a smooth cut into the work piece is provided by portions of the cutting edge between the notches, and by regions on the teeth where no notches are provided.

Abstract: A rotary multi-tooth milling cutter, each tooth having a tooth face is provided. The tooth face has at least two sections, a first section nearest the cutting edge having a convex form as viewed in a cross section perpendicular to the cutter axis and a second section in a concave form.

Abstract: Metallic guide elements having a functional area are made from profiled blanks by hot forming the profiled blanks and subsequently milling in a high speed milling cutter system the profiled blanks by a position-controlled milling cutter head with milling disks of a great diameter, wherein in the step of hot forming the profiled blanks are matched with regard to a cross-sectional mass distribution of the profiled blanks, respectively, to the subsequent step of milling such that by a partial cutting removal in the areas of the profiled blanks that become the functional area of the guide element narrow dimensional tolerances are produced. The material flow of the profiled blanks within the high-speed milling cutter system is controlled autonomously by an integrated stacking device that has manipulators and turning stations.

Abstract: A milling cutter is used for processing a metal substrate and includes a handle and a cutting portion. The cutting portion extends outward from one end of the handle. The cutting portion includes at least two opposite spiral guiding grooves. A cutting knifes is provided on one side of the guiding groove. The cutting knife has a spiral angle with range between 35°˜45° and the cutting portion is coated with a coating layer on surface thereof. The surface hardness, lubrication and scouring removing ability are enhanced. The abrasion and heat pipe for the cutting knifes 23 and 24 can be eliminated.

Abstract: A process by which nanostructured monolithic bodies can be produced in a single continuous operation, as opposed to multi-stage deformation processing. The process generally entails continuously producing a chip having a nanostructured microstructure by engaging a solid body with a cutting edge of a tool while the solid body and the cutting edge move relative to each other, and simultaneously extruding the chip in the immediate vicinity of the cutting edge, such as with a constraining member, as the chip is separated from the solid body by the cutting edge to continuously plastically deform the chip and produce a nanostructured monolithic body immediately downstream of the cutting edge. The shape and size of the chip can be simultaneously controlled by the extrusion process so that the nanostructured monolithic body has a predetermined geometry. The nanostructured monolithic body can be in the form of a product suitable for immediate use, or undergo further processing to yield a product.

Abstract: The present invention relates to a replaceable cutting tip and, more particularly, to such cutting tips attachable to the cutting tip holders by a threaded connection. The cutting tip for a cutting tool includes a working end portion disposed along an axis of the cutting tip and including one or more cutting edges for machining a workpiece, and a mounting portion disposed along the axis of the cutting tip. The mounting portion includes a frustoconical supporting surface tip portion and a frustoconical threaded portion. The present invention also relates to a cutting tool per se.

Abstract: 12. A rotationally drivable milling cutter has a cylindrical carrier body (10), which is equipped on its circumference with a plurality of cutting bodies (12) comprising a cutting material that is harder than hard metal. The cutting bodies (12) are embodied in platelike form and are each embodied and disposed such that the leading region of the radially outer circumferential edge forms the cutting edge, the adjacent side face (15) forms the first face with a negative rake angle, and the top face (17) diametrically opposite the bottom face forms the flank. To that end, the cutting bodies (12) are each secured with their bottom face on the end face of blind bores (30), in the circumferential face thereof, that are oriented with the angle to the shortest connecting line between the center point of the end face and the center longitudinal axis of the carrier body (10) such that the side face (15) adjacent to the cutting edge forms the predetermined rake angle.

Abstract: A high speed planer head. Disclosed according to one aspect of the invention is a hub and a threaded member. The hub is axially disposed for rotation about an axis, and has a pocket for receiving a first knife against a supporting wall of the pocket. The threaded member has a frustoconical ramping portion for producing a wedging force against the knife when the threaded member is threaded into a threaded hole in the hub. According to another aspect of the invention, a second hub for carrying a second knife is provided, the second hub preferably being bolted to the first hub to that the hubs can be disassembled. The second knife preferably has two linear cutting edges and the second knife preferably has at least two curvilinear cutting edges and more preferably has four concave, semi-circular cutting edges that are spaced apart from one another with 90 degree rotational symmetry.

Abstract: The present invention relates to a tool and a male part for chip removing machining. The tool includes a male part and a holder for the male part. The male part includes a radial and axial supporting and positioning portion and a threaded portion. A largest diameter of the externally threaded portion is smaller than a smallest diameter of the radially and axially supporting and positioning portion. A transition portion is disposed along the axis of the male part between a radially largest portion of the radially and axially supporting and positioning portion and the externally threaded portion.

Abstract: A milling tool 1, in particular a tubular drill, includes a shaft 2 and a working portion 3. At least one cutting edge 8 is provided at a face of the working portion 3 and at least one bore 4 extends into the face of the working portion 3. The axis of the bore 4 extends axially parallel or in an angle, preferably between 0° and 20°, with respect to an axis 5 of the tool 1.

Abstract: In a method for cutting freeform surfaces, a workpiece is cut by a cutting tool such that a desired freeform surface may be achieved, the cutting tool for cutting purposes being moved along at least one defined cutting path relative to the workpiece. A cutting tool is used, the tool head of which has a greater radius than a tool shank of the cutting tool.

Abstract: An end mill for cutting or milling objects and a method of operation thereof. The abstract of the disclosure is submitted herewith as required by 37 C.F.R. §1.72(b). As stated in 37 C.F.R. §1.72(b): A brief abstract of the technical disclosure in the specification must commence on a separate sheet, preferably following the claims, under the heading “Abstract of the Disclosure.” The purpose of the abstract is to enable the Patent and Trademark Office and the public generally to determine quickly from a cursory inspection the nature and gist of the technical disclosure. The abstract shall not be used for interpreting the scope of the claims. Therefore, any statements made relating to the abstract are not intended to limit the claims in any manner and should not be interpreted as limiting the claims in any manner.

Abstract: Tube ends such as those of boiler tube banks, are prepared utilizing any of various combinations of processes which include a step of micro-diameter tube film removal from a portion of a tube end, including an area below a beveled segment, or segment to be beveled. The micro-diameter film removal step provides the tube with an exposed, clean metal surface which is conducive to a subsequent welding or bonding operation performed on the tube. In yet a further embodiment, tube film removal blades are provided having a curved or rounded edge which can be utilized in milling operations having close quarters. In a further embodiment, milling head cutting blades are provided which are adjustable. In a preferred embodiment, the milling head cutting blades and/or bevel blades are provided with elongated, slotted bores.

Abstract: A rotary cutting tool or end mill is provided, the tool comprising a plurality of pairs of diametrically-opposed, symmetrical, helical flutes formed in a cutting portion of the tool body, wherein the pitch between at least one pair of adjacent helical flutes is less than or greater than the pitch of at least one other pair of adjacent helical flutes in at least one radial plane along the axial length of the flutes, a plurality of peripheral cutting edges, wherein at least one of the peripheral cutting edges has a radial rake angle different from radial rake angle of a peripheral cutting edge of a different helical flute.

Abstract: A tool has a shaft and a tip on the shaft. The tip supports rougher and chipbreaker finisher wings which, for example, may be polycrystalline diamond wings. Also, the rougher and chipbreaker finisher wings may be arranged, for example, to provide either upshear or downshear forces. As another example, both upshear and downshear rougher and chipbreaker finisher wings may be arranged to produce corresponding upshear and downshear forces.

Abstract: A preferably rotationally driven tool is specified for the deburring of openings, such as for example bores that open laterally into an essentially cylindrical recess. The tool has a cutting head that is seated on a shaft and that has at least one cutting edge that extends, at least in segments, in the axial direction. So that the deburring can be carried out reliably and with the lowest possible expense, a radial force-producing device is integrated into the tool, for example in the form of at least one internally situated flow medium channel, from which at least one branch channel goes out that opens in the area of the cutting head or in the vicinity thereof, preferably at a peripheral distance to the at least one cutting edge, in the external peripheral surface thereof.

Abstract: A rotating tool for simultaneously deburring two surfaces of a workpiece is disclosed including a rotatable shaft having a first end and a second end with a first deburr surface on the first end facing towards the second end and having a first angle. A second deburr surface is formed between the first end and the second end facing towards the first end and having a second angle. The distance between a first mid-point of the first deburr surface and a second mid-point of the second deburr surface is substantially equal to a width of the workpiece.

Abstract: In a die board for cutting and/or creasing sheet-type work material, a base is provided that includes a first upper surface and a second lower surface. At least one slot extends along the first upper surface and includes a first slot section extending from said first upper surface at least part-way through the die board base. The at least one slot also includes a second slot section extending from said second lower surface at least part-way through the die board base. The first and second slot sections each have a width with at least one of the slot section widths being adapted to grip and retain at least one die-board rule.

Abstract: An end mill is provided that includes a shank section and a fluted section. One or more helical teeth are disposed along an outer surface of the fluted section. Each helical tooth has a cutting surface and a relief wall that intersect to form an angle defining a helical cutting edge. The cutting surface of each helical tooth includes a first section, a second section, and a take-off peak disposed between the first section and second section. The cutting edge of each helical tooth includes a first portion having a first constant angle, and a second portion having a second constant angle unequal to the first constant angle, and an arcuate transition section connecting the first portion and second portion. Some embodiments of the present invention include more portions than the aforesaid first and second portions.

Abstract: A rotary cutting end mill is provided. The end mill includes a shank section and a fluted section. The fluted section has a first end integrally attached to the shank section, a second end, and an outer surface. One or more helical teeth are disposed along the outer surface of the fluted section. Each helical tooth has a cutting surface and a relief wall that intersect to form an angle defining a helical cutting edge. The helical cutting edge defines an outer circumferential cutting path. The cutting surface includes first, second, and third sections, and first and second take-off peaks. The first take-off peak is disposed between the first section and second section. The second take-off peak is disposed between the second section and the third section.

Abstract: A multi-purpose end-mill to be used for different machining purposes, in particularly useful for closed or open contours machining. The end-mill comprises a cylindrical shank portion connected to a first cutting portion provided with a plurality of spaced-apart cutting teeth and a second portion provided with a plurality of different spaced-apart cutting teeth.

Abstract: A rotary multi-tooth milling cutter, each tooth having a tooth face is provided. The tooth face has at least two sections, a first section nearest the cutting edge having a convex form as viewed in a cross section perpendicular to the cutter axis and a second section in a concave form.

Abstract: A rotating tool such as a drill, a milling cutter, a countersink, a deburrer and the like, including a working part, which is driven in rotation about an axis of rotation for cutting machining, and also including an axially adjoining clamping shank for insertion into a clamping chuck of a drive machine. The clamping shank is provided with a number of clamping surfaces on its outer circumference for supporting a clamping jaw of the clamping chuck. The clamping shank has a shank radius in the region of each clamping surface which, as seen in a predetermined direction of rotation of the tool, rises from a minimum shank radius to a maximum shank radius as it passes over a range of angle of rise.

Abstract: A milling cutter with two faces of cutting end and two mirror symmetrical central bores for the mounting in a shell mill holder on either one of them. The aligned key grooves are formed on the bottom surface of each central bore. The inserts are located on the periphery of each cutting end.

Abstract: A rotary cutting tool is disclosed including a substantially cylindrical main body having a shank portion at one end and a point at an opposite end. Five flutes are formed in an outer surface of the main body. Each of the flutes extends continuously from the point to the shank portion, and defines a helical cutting edge having a helix angle between about 32 degrees and approximately 34 degrees with respect to an axis of the main body. At least 2 of the flutes define helical cutting edges having different helix angles.

Abstract: An apparatus and a tool for chipping material are provided. The apparatus includes chipping tools arranged relative to one another inside a housing, whereby the chipping tools are constructed planiformly, and are arranged on carrier elements along a drum-shaped, disk-shaped, or ring-shaped chipping path. The chipping tools rotate relative to one another by rotating about an axis of rotation, and are each divided by a division line based on their thickness into a core area, which faces the carrier element, and a utilization area, which is positioned opposite of the chipping tools. The chipping tools have at least one bore, formed perpendicular to the division line, the bore extends across the utilization area and ends at the division line between the core area and the utilization area.

Abstract: A shank milling cutter includes a cutting portion which is intended to come into engagement with the workpiece, wherein the envelope surface of the cutting portion is substantially cylindrical. At least one major cutting edge is arranged at the peripheral surface of the cutting portion and at least one minor cutting edge (face cutting edge) is arranged at the end face of the cutting portion and with an end diameter D. The minor cutting edge, in projection onto a plane containing the milling cutter axis, has a convexly curved portion with a radius of curvature R>D/2 and a center of curvature M located such that a distance from the center of curvature M to the axis is in a range from zero to a value smaller than D/2.

Abstract: A technique having superior efficiency for manufacturing a bevel gear forging die is presented. In the present invention, raw material is machined by means of a radius end mill, manufacturing a bevel gear forging die 10. In recent years, it has become possible to use radius end mills to form complex shapes from raw materials having a high degree of hardness, owing to the fact that NC construction devices and their controlling programs control the deployment of radius end mills, and due to the improved accuracy of the radius end mill itself. By improving the process path of the radius end mill, the inventors have succeeded in creating a process whereby a radius end mill can be used to cut a bevel gear forging die 10 having a side face, a base face, and a diagonal face.

Abstract: Rotary cutting tools for cutting various types of sheet material are known. However, when cutting non-ferrous materials, damage known as fluttering is caused to both surfaces of the sheet material being cut. The requirement for the cutting of larger and larger sheets of material for safety critical applications such as aircraft wings has made fluttering unacceptable. Furthermore, scrapping sheets of material which exhibit fluttering is extremely expensive. Fluttering occurs as a result of excess pressure being placed on a workpiece edge as it is being cut. A rotary cutting tool (10) for a power tool is disclosed in which the cutting tool comprises body means (12) having a first flute (20, 30), a substantially planar first cutting surface (22, 32) and a first cutting edge (24, 34) formed on said first cutting surface; and wherein said first cutting edge (24, 34) is formed at a first angle to a longitudinal axis of the cutting tool. This cutting tool addresses the problems associated with fluttering.

Abstract: An end mill including a cylindrical body having (a) flutes each formed in the cylindrical body and each extending from an axially distal end of the cylindrical body toward an axially proximal end of the cylindrical body, (b) peripheral cutting edges each provided by one of widthwise opposite edges of a corresponding one of the flutes, and (c) end cutting edges each located at the axially distal end of the cylindrical body and contiguous to a corresponding one of the peripheral cutting edges. The end cutting edges include first and second end cutting edges, while the peripheral cutting edges include first and second peripheral cutting edges which are contiguous to the first and second end cutting edges, respectively. A first axial rake angle of the first end cutting edge is smaller than a second axial rake angle of the second end cutting edge, while a first radial rake angle of the first peripheral cutting edge is larger than a second radial rake angle of the second peripheral cutting edge.

Abstract: A device is disclosed for the surface machining of, among other things, plastic spectacle lenses, which has a work spindle, by means of which the spectacle lens can be driven with a controlled angle of rotation about an axis of work rotation, and a tool spindle, by means of which a tool can be driven to rotate about an axis of tool rotation, work and tool spindle being movable relative to one another with their positions controlled in two axes running at right angles. For rotational machining of the surface of the spectacle lens to be machined, the tool can also be swiveled by means of the tool spindle with a controlled angle of rotation about the axis of tool rotation, so that a rotational cutting edge provided on the tool can be brought into a defined rotational machining engagement with the surface of the spectacle lens to be machined as a function of the angle of rotation of the spectacle lens.

Abstract: A shank-end tool is described that is simple and economical to manufacture, with permanently attached wing-like inserts for the milling-type machining of chipless materials that remains functional with unavoidable frictional wear and with increasing erosion. The shank-end tool is characterized by a shank (1) rotatable around its longitudinal axis (2) that can be connected detachably to a drive device and is provided at its free end section (6) with at least one groove-shaped recess (7) extending in the axial direction and one flat cutter blade (8), which is provided with a non-cutting blade edge (12) on its leading face viewed in the direction of advance (9). The shank-end tool is used for the manufacture of molds, especially heat-resistant casting molds for the production of metal castings.

Abstract: A rotatable cutter wheel for machining structural members is provided. The cutter wheel includes a disk, typically formed of carbide, defining a first side, a second side opposite to the first side, and a plurality of radial blades. At least one of the first and second sides defines a dished or concave surface.

Abstract: Tube ends such as those of boiler tube banks, are prepared utilizing any of various combinations of processes which include a step of micro-diameter tube film removal from a portion of a tube end, including an area below a beveled segment, or segment to be beveled. The micro-diameter film removal step provides the tube with an exposed, clean metal surface which is conducive to a subsequent welding or bonding operation performed on the tube. Preferably, the process is performed with a tube milling tool having interchangeable milling or cutting heads. A specialized milling head is also disclosed and, in one embodiment, is at least used to perform the micro-diameter tube film removal step. Advantageously, the tube film removal milling head also removes a weld overlay on one or both sides of a tube in one embodiment. The tube film removal milling head includes an attached blade having a planar face configuration which enables tube film removal.

Abstract: A cemented carbide ball end mill comprises a cutting portion with a semi-spherical ball portion at a tip thereof. The cutting edge portion has a cutting edge rake face and a chip evacuating flute at the ball portion. An angle formed by a straight line connecting a vertex of the ball portion, where an intersection line passes through, and another end of the intersection line with respect to the central axis, is from 30° to 50°. Further, and angle formed by the rake face and the chip evacuating flute is from 100° to 150°, and a width of the chip evacuating flute is 0.5 to 5 times as large as a radius of the ball portion.

Abstract: A milling tool has a cutting edge geometry with a main cutting edge, a cutting corner, optionally with a bordering planar cutting edge segment, and a secondary cutting edge. The tool is used for milling to achieve the smoothest level surface possible parallel to the rotational axis of the milling tool. Each main cutting edge is formed to result in a generatrix of the envelope curve described by the rotation of the milling tool that has a first outwardly curving segment and a second inwardly curving segment. The first segment increases in its distance from the rotational axis from the beginning of the segment to the end of the segment. The distance of the second segment decreases from its beginning towards its end. The tangents at each point of the second segment encompass an angle ?2 of more than 0° and up to 3° with a parallel to the rotational axis.

Abstract: In a die board for cutting and/or creasing sheet-type work material, a base is provided that includes a first upper surface and a second lower surface. At least one slot extends along the first upper surface and includes a first slot section extending from said first upper surface at least part-way through the die board base. The at least one slot also includes a second slot section extending from said second lower surface at least part-way through the die board base. The first and second slot sections each have a width with at least one of the slot section widths being adapted to grip and retain at least one die-board rule.

Abstract: A rotary trim tool (11) and method for trimming workpieces of various materials. The rotary trim tool comprises a shank (12), a trim guide (13), a cutting member (14), and a trim-depth guide (15). For use, the tool (11) is mounted in a rotatable machine, such as a router. The trim tool (11) is setup for trimming by adjusting its axial position in relation to the workpiece, and by using a trim-depth guide (15) of appropriate dimension. Using this method, the rotary trim tool (11) is capable of trimming the workpiece to precise dimensions.

Abstract: In a radius end mill having a bottom edge formed on the end face thereof, a radius edge designed in a substantially quarter arc shape and formed at a corner portion thereof, and an outer peripheral edge formed spirally on the side surface thereof, the bottom edge and the radius edge being continuously connected to each other at a connecting point A while the radius edge is continuously connected to each other at a connecting point B, when a view taken along a plane that passes through the connecting points A and B and crosses a rake face of the radius edge is represented by an R cross-sectional view, the rake face of the radius edge is designed to have a convex curved line extending from the connecting point A to the connecting point B in the R cross-sectional view.

Abstract: The Invention relates to tools for the machining of materials by milling. The invention provides an improved form for a rotary cutting tool such as an end-mill, configured to extend tool life while increasing metal removal rates.The invention provides a rotary multi-tooth cutter, the cutting edge of each tooth being provided along its length with a repeated wave form, comprising four substantially straight sections interconnected by mill, the first section being identical with the unmodified cutting edge. The second section adjoins the first section on a side nearer the tool shank and extending at an angle to the first section into the tooth. The third section, adjoining the first section on a side nearer the tool tip, extends at an angle to the first section into the tooth. The fourth section is connected to the third section extending into the tooth at an angle greater than the third section. A root radius connecting the fourth section to the adjoining second section of the adjacent form.

Abstract: A cutter bit for use in combination with a rotary cutter, the cutter brick comprising a removal boss integrally formed on the cutter bit shank adjacent to cutter bit body to allow removal of the cutter bit from the rotary cutting tool with a wrench ordinarily used to operate the chuck mounted on the rotary cutting tool. A boss includes a pair of spaced apart annular flanges extending outwardly from the shank and a concave angular area extending between the flanges.

Abstract: An end mill including a cylindrical body having (a) flutes each formed in the cylindrical body and each extending from an axially distal end of the cylindrical body toward an axially proximal end of the cylindrical body, (b) peripheral cutting edges each provided by one of widthwise opposite edges of a corresponding one of the flutes, and (c) end cutting edges each located at the axially distal end of the cylindrical body and contiguous to a corresponding one of the peripheral cutting edges. The end cutting edges include first and second end cutting edges, while the peripheral cutting edges include first and second peripheral cutting edges which are contiguous to the first and second end cutting edges, respectively. A first axial rake angle of the first end cutting edge is smaller than a second axial rake angle of the second end cutting edge, while a first radial rake angle of the first peripheral cutting edge is larger than a second radial rake angle of the second peripheral cutting edge.

Abstract: A method and cutting tool for producing a hole or a recess in a workpiece which includes flat or curved sheets of fiber-reinforced composite material, metal or combinations thereof. The cutting tool has a shaft with a longitudinal axis and an axial cutting surface and at least one cutting edge disposed on the axial cutting surface and extending radially from the longitudinal axis with a gap between the radial inner extent of the cutting edge and the longitudinal axis. The method of use includes rotating the cutting tool about its longitudinal axis and also translating the cutting tool during rotation.