Abstract: A tangential cutting insert includes two opposing end surfaces and a peripheral side surface extending between the two opposing end surfaces. The peripheral side surface includes two opposing major side surfaces connected to two opposing minor side surfaces via corner side surfaces. A peripheral edge is formed at the intersection of each end surface with the peripheral side surface. Each end surface has two raised corners with associated raised corner cutting edges and two lowered corners with associated lowered corner cutting edges. Each of the corner side surfaces includes a concave clearance depression which serves as a relief surface for an associated lowered corner cutting edge. The concave clearance depression extends from its associated lowered corner cutting edge in the direction of, but does not intersect, a raised corner associated with opposite end surface.

Abstract: The milling cutter includes blades each having a cutting edge and a rear face. The cutting edges extend radially outwards from a longitudinal axis so as to create, during the rotation of the milling cutter, one or two concave surfaces for receiving the ends of one or two electrodes. The rear face has a concave profile in a section plane perpendicular to the cutting edge.

Abstract: An indexable cutting insert has first and second side surfaces and a peripheral surface extending therebetween. The peripheral surface has identical peripheral faces, each divided into two identical first and second cutting sections. Each cutting section has a first cutting edge, a second cutting edge, a corner cutting edge which extends between the first and second cutting edges and a rake surface having a planar rake surface flat forming an engagement surface. The rake surface meets the first side surface at the first cutting edge. The rake surface flat meets the second side surface at a rake surface open edge. On each peripheral face, the two cutting sections are non-coplanar. Each two rake surface flats associated with first cutting sections converge in a direction along an insert axis and the cutting edges are raised above the rake surface flat.

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 rotationally drivable cutting or milling tool has at least one first cutting tooth effective in a first rotational direction and at least one second cutting tooth effective in a second rotational direction opposite to the first rotational direction. The at least one first cutting tooth and the at least one second cutting tooth have differently oriented cutting edges for performing different machining steps in the first and second rotational directions, respectively.

Abstract: The present invention is directed to an insert, a slotting cutter assembly and a method for machining a plurality of slots in a metallic alloy part. The insert may comprise a cutting edge, at least one primary radius, at least two secondary radii and a clearance angle. The cutting edge may form a narrow outer end at a tip of the insert and a larger width region at a distance inward from the narrow outer end. The clearance angle may extend rearward from the cutting edge. The slotting cutter assembly may comprise a plurality of inserts and a cutter body. The cutter body may comprise a plurality of retaining slots and a plurality of support portions. The retaining slot may be configured to receive the insert. The support portion may provide support for the insert.

Abstract: A cutting tool includes a tool body having proximal and distal ends and defining a central axis. The tool body includes a shank portion and a fluted portion. The shank portion may be configured to be rotatably engageable to a milling machine. The fluted portion may include a plurality of teeth disposed about a circumference thereof and being formed at a radius relative to the central axis. In one embodiment, the teeth may be divided into first and second tooth sections with the teeth in the second tooth section being formed at a reduced radius relative to the teeth in the first tooth section.

Abstract: A cutter includes a cutter handle and cutter head including a main body and a plurality of curved cutting edges separately extending from a periphery of the main body. Each cutting edge has a top surface, a first side blade surface, a second side blade surface, and a bottom surface. The top surface, the first side blade surface, the second side blade surface, and the bottom surface intersect to form a front edge, a middle edge, and a back edge. The front edge, the middle edge, and the back edge cooperatively form an edge tip. A tangent of the middle edge at the edge tip intersects with the bottom surface to form a cutting angle in a range from 30° to 60°.

Abstract: A cutting element for use in a cutting operation, comprising a cutting edge (CE) capable of cutting out material from a workpiece during the operation, to form therein a workpiece corner of angle alpha. There exists at least one view of the cutting edge in which a portion of the cutting edge is delimitable by a first (L1) and a second (L2) line oriented tangentially to the portion of the cutting edge portion at respective tangency points A and B. The lines form therebetween a cutting angle corresponding to the workpiece corner angle alpha and have a vertex 0. For a bisector of the cutting angle intersecting the portion of the cutting edge at the point C, the projection C of the point C of the portion of the cutting edge on a line OL passing through the vertex 0 perpendicularly to the plane of the one view is located between projections A1 and B? of the respective points A and B of the portion of the cutting edge on the line OL.

Abstract: A cutting insert of the present invention includes a side face having an upper concave portion which is located between an upper face and a lower face and extends up to the upper face, and a plurality of divided upper cutting edges which are located at the intersection of the upper face and the side face, and are divided by the upper concave portion. Each of these divided upper cutting edges includes a first end and a second end, and is inclined being closer to the lower face from the first end toward the second end. The plurality of divided upper cutting edges include a first divided upper cutting edge and a second divided upper cutting edge adjacent to each other.

Abstract: A milling cutter for milling a groove into a blade footing of a turbine blade made from a superalloy. The milling cutter comprises a shaft part and a cutting part connected to the shaft part in the longitudinal direction. The cutting part has flutes and, when viewed in cross section perpendicular to the longitudinal direction, has several cutting teeth distributed about the periphery. The cutting teeth are designed as scraping teeth with negative cutting geometry.

Abstract: A rotary cutting tool is provided having an axis of rotation, a shank section, a fluted section, and a plurality of helical teeth. The shank section and the fluted section both extend along the axis of rotation. The fluted section has a first end integrally attached to the shank section, a second end, and an outer surface extending between the first and second ends. A plurality of helical teeth is disposed along the outer surface, each having a cutting edge and an undulating geometry. The helical teeth are arranged so that rotationally successive cutting edges are sufficiently dissimilar relative to one another to inhibit a detrimental periodic response in the rotary cutting tool.

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: A machining tool, such as a ballnose end mill, a flat end mill, or a drill, which has a center area that is designed for improved ejection of chips produced during cutting of a workpiece. The machining tool has an edge on the end or tip of the tool starting proximate to the central rotational axis of the tool at a position located a distance above the x axis and to the right of the y axis.

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 cutting tool having multiple cutting edges includes a tool body having a longitudinal axis, a first cutting edge including a first leading edge that defines a first profile when rotated about the longitudinal axis, and a second cutting edge including a second leading edge that defines a second profile when rotated about the longitudinal axis, the first and second profiles being different from each other and being adapted to cut a workpiece in succession. A method is also disclosed.

Abstract: A milling cutter head has a base body rotatable about a longitudinal axis and formed with axially extending seats, respective blade holders axially shiftable in the seats, respective blades welded to the blade holders and each having a cutting edge, and respective wedges shiftable in the base body and engaging the blade holders, whereby the wedges can adjust axial positions of the respective blades. A clamp can fix the blade holders in the body. The cutting edge of at least one of the blades is angled and has relative to the axis a long radially outer part and a short radially inner part angled relative to the respective outer part by 3° to 7° so that the two parts form an angle of 177° to 173°.

Abstract: A cutting or milling insert for rotatable tool for chip removing machining and of the type that comprises a cutting edge in a transition between a front chip surface and a clearance surface extending rearward from the same. Remotely behind the first-mentioned cutting edge, a second cutting edge is formed in a transition between, on one hand, a second chip surface behind the first clearance surface, and, on the other hand, a trailing second clearance surface. The spacing between opposite sections of the front cutting edge is greater than the corresponding spacing between opposite sections of the second or rear cutting edge, the cutting edge angle (?) of at least the front cutting edge being acute. A rotatable cutting tool, which is equipped with the cutting or milling insert is also provided.

Abstract: A chatter-resistant end mill and a method of making such an end mill, in which the teeth of the end mill are unequally spaced apart to substantially reduce or eliminate vibrations produced during cutting of a work piece.

Abstract: The invention concerns an end milling cutter having a plurality of end cutting edges (10, 20) of which at least a first (10) extends to the axis (30) of the milling cutter.

Abstract: First and second bore blade portions are provided on the outer periphery of a rotary shaft at intervals in the circumferential direction with a rotation axis as the center. A first bore blade portion has a continuous blade and a second bore blade portion has a discontinuous blade having protruding blade edges and indented blade edges, which are alternately provided. The distance in the radial direction of the protruding blade edges is set so as to be greater than or equal to the distance in the radial direction of a continuous blade, and the distance in the radial direction of indented blade edges is set so as to be smaller than the distance in the radial direction of the continuous blade. Accordingly, the cutting resistance of the bore cutter can be reduced.

Abstract: A cutting tool comprises a tool body having proximal and distal ends and defining a central axis. The tool body includes a shank portion and a fluted portion. The shank portion may be configured to be rotatably engageable to a milling machine. The fluted portion may include a plurality of teeth disposed about a circumference thereof and being formed at a radius relative to the central axis. In one embodiment, the teeth may be divided into first and second tooth sections with the teeth in the second tooth section being formed at a reduced radius relative to the teeth in the first tooth section.

Abstract: An end mill is provided having an axis of rotation, a shank section and a fluted section, each extending along the axis of rotation, and a plurality of helical teeth. The fluted section has a first end attached to the shank section and a second end. The plurality of helical teeth is disposed within the fluted section. Each helical tooth has a cutting edge, a relief surface, a cutting surface, and an edge preparation surface. The edge preparation surface is contiguous with the cutting edge of the respective tooth.

Abstract: The present invention relates to a router tool for edging the peripheral edge of eyeglass lenses. The tool comprises a longitudinally extending body rotatable on the axis thereof. A first blade extends axially and radially from the body, and has a first cutting portion for shaping an edge of a lens to a first configuration. A second blade is provided that is axially spaced from the first blade. The second blade extends axially and radially from the body, and has a second cutting portion for shaping an edge of a lens to a second configuration different than the first configuration. The present invention also relates to an edger having the disclosed router tool, and a method for shaping the edge of eyeglass lenses.

Abstract: It is the object of the present disclosure to provide an improved end mill that can be easily manufactured, reduces cutting forces on the driving tool, limits chatter at high rotation speeds, has better stability, produces smoother cutting surfaces, and has less natural resonating frequencies while in use to permit operation of the end mill over a wider range of operating conditions. The end mill is equipped with a series of sinusoidal cutting edges with a single long pitch arranged regularly or irregularly along the circumferential cutting surface. In another embodiment, the pitch, the cutting angle of the datum line of the sinusoidal cutting edges and the amplitude of the sinusoidal function can be varied.

Abstract: An indexable turning insert (1) comprising two opposing larges sides formed by a support centre part (4) and a plurality of cutting parts (5-8) projecting outwardly therefrom, each having a cutting edge (9-12) extending between said sides and being spaced apart around the outer perimeter of the centre part for indexing, has four said cutting parts. Each cutting part has a clearance side (13) extending on one of said sides of the insert from the cutting edge of the cutting part towards said centre part while making clearance angles in two dimensions with respect to the cutting edge, and the cutting edge of each cutting part makes an angle being below 90° by less than said clearance angles with the other of said sides of the insert.

Abstract: A rotary cutting tool with a longitudinal axis is provided that includes a shank portion, a cutting portion, and a plurality of chip-breaking features. The cutting portion, which extends out from the shank portion, includes a length, a plurality of blades and a plurality of flutes. The blades and flutes extend substantially all of the length of the cutting portion. Each blade includes a leading face side, a trailing face side, and a land surface that extends between the leading face side and the trailing face side. The plurality of chip-breaking features are disposed in the land surfaces of the blades, and non-uniformly distributed among the blades.

Abstract: A debris removal tool is generally provided with a head unit having a base plate, at least one cutting tooth and a drive unit for rotating the base plate. A flex plate may be provided for biasing the base plate with respect to an axis of rotation. The cutting teeth may be removably and pivotably coupled with the base plate. An elongated handle may be provided for use with the head unit and may be pivotably secured there too. Rechargeable and disposable power sources may be used with the drive unit. Various embodiments that incorporate functional grips and brushes are also disclosed.

Abstract: The invention relates to a cutting insert, in particular for a milling work, with a basic body which respectively has on opposite sides peripheral cutting edges, which protrude beyond the respectively adjoining face regions (15), descending at a positive rake angle, in the middle of which one or more planar supporting surfaces (16) are arranged, and with a central fastening hole (12) for receiving a tensioning screw. Arranged around the central fastening hole is at least one conical surface (19), with a cone descending inwards, i.e. towards the fastening hole.

Abstract: A cutting tool has a cutting insert retained in an insert pocket by a retaining screw. The rear surface of the cutting insert has an insert engaging element that comprises first insert rear abutment surfaces that are spaced apart and make an insert engaging angle with each other. The rear surface of the insert pocket has a pocket engaging element that comprises first pocket rear abutment surfaces that make a pocket engaging angle with each other. In a retained position, the first insert rear abutment surfaces abut the first pocket rear abutment surfaces, second insert rear abutment surfaces abut second pocket rear abutment surfaces and insert lower abutment surfaces abut pocket lower abutment surfaces.

Abstract: A cutting tool has a table for placing a workpiece thereon. A cutting unit is mounted to the table. A support leg device includes a support leg, an operation member and a motion conversion mechanism. The motion conversion mechanism is coupled between the support leg and the operation member, so that the movement of the operation member is converted into the movement of the support leg.

Abstract: It is an object to provide a cutting tool which can perform high-quality, high-efficiency machining of a workpiece such as hardened steel. The cutting tool includes a finishing cutting edge 6 which initially cuts into the workpiece, and superfinishing cutting edges 7 for finishing the workpiece cut by the finishing cutting edge. The superfinishing cutting edges 7 project from the finishing cutting edge by a predetermined amount B in such a direction that the depth of cut of the superfinishing cutting edges increases. Each superfinishing cutting edge includes a burnishing portion 7a having a predetermined width L in the feed direction of the tool, and a wiper portion 7b. The superfinishing cutting edges 7 burnish the finished surface formed by the finishing cutting edge, while removing a affected layer formed by the finishing cutting edge.

Abstract: A cutting insert for a cutting or breaking tool, which can be mounted in a tool holder that can be rotated about its longitudinal axis, especially for a lathe chisel, has an essentially conical tip, a transition region and a foot for connecting to a tool body, wherein the transition region has several spatial areas which are distributed over its periphery and adjoin one another forming spatial and cutting edges.

Abstract: A radius endmill has a peripheral cutting edge, a bottom cutting edge, and a rounded corner cutting edges whose ridge line is defined by a circular arc having a given radius as measured in a side view of the endmill that is parallel to the axis. The rounded corner cutting edge is located in a corner portion of the endmill in which the outer peripheral and the axial end intersect each other such that the peripheral cutting edge and the bottom cutting edge are connected to each other through the rounded corner cutting edge. The bottom cutting edge has a radially inner end lying at the axis, and a radially outer end at which the bottom cutting edge is connected to the rounded corner cutting edge. The bottom cutting edge is curved such that its ridge line is defined by a circular arc as seen in a plan view of the endmill that is perpendicular to the axis.

Abstract: A circular truncated cone-shaped cutting section (3) of a chamfering tool (1) is formed with a first blade section (31) which is tilted so that a chip is discharged to a side of a shank section (2), and a second blade section (32) which is tilted so that the chirp is discharged to a direction opposite to the side of the shank section (2) in a peripheral direction with a gap. The chamfering tool (1) is rotated, and the first blade section (31) and the second blade section (32) are alternately brought into contact with an edge of an object to be worked so that the edge is chamfered. As a result, occurrence of a secondary burr on the edge is suppressed.

Abstract: A method of currently milling multiple splines on a round rod material. Inserts mountable on a milling machine are provided. The inserts each include two sets of milling teeth. The sets or sections of teeth are formed in the arc of a circle to enable milling multiple splines concurrently. The first set of teeth rough mills the grooves for the splines and the second set of teeth provides the finished milling.

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: 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: 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 rotary cutting tool has a substantially cylindrical main body and four flutes. The main body has a shank end, a cutting end formed integrally opposite the shank end, and a longitudinal axis of rotation. The four flutes include a pair of flutes comprising a first flute and a second flute formed on opposite sides of the main body, and each of the pair of flutes are symmetrical and have the same helix angle. A third flute is formed on one side of the main body between the pair of flutes, and defines a helical cutting edge having a helix angle that is different than the helix angle of the pair of flutes. A fourth flute is formed on the other side of the main body, and defines a helical cutting edge having a helix angle that is different than the helix angle of the pair of flutes and different than the helix angle of the third flute.

Abstract: An indexable cutting insert includes a first component with an outer or top surface and side surfaces. A third component is mirror symmetric with respect to the first component about a vertical or y-axis of the cutting insert. A second component is disposed between the first and third components. Multiple cutting edges are defined at an intersection between the side surfaces and the top surface, wherein the cutting edges define a positive axial rake angle. In one embodiment, the first and third components are in the shape of a polygonal with a star appearance, and the second component is in the shape of a square. The first and third components are offset from one another by a first offset angle, while the second component is offset from the first and third components by a second offset angle to allow the cutting insert to be indexable.

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 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: The present invention relates to a router tool for edging the peripheral edge of eyeglass lenses. The tool comprises a longitudinally extending body rotatable on the axis thereof. A first blade extends axially and radially from the body, and has a first cutting portion for shaping an edge of a lens to a first configuration. A second blade is provided that is axially spaced from the first blade. The second blade extends axially and radially from the body, and has a second cutting portion for shaping an edge of a lens to a second configuration different than the first configuration. The present invention also relates to an edger having the disclosed router tool, and a method for shaping the edge of eyeglass lenses.

Abstract: The present invention provides a cutting insert an indexable cutting insert, for use in a cutting tool for milling operations. The cutting insert is generally rhomboidal in shape having a peripheral side surface extending between and perpendicular to the two opposing end surfaces. A cutting edge section is associated with each end surface and comprises first and second cutting edges merging at a corner cutting edge. The two first cutting edges associated with each end surface, form a non-zero first angle with respect to a median plane of the cutting insert. The peripheral side surface comprises four generally flat major side surfaces, two diametrically opposing radiused corner side surfaces, and two diametrically opposing generally flat minor side surfaces. Each end surface is provided with a flat end region. The flat end regions are parallel and form axially outermost protruding regions of the cutting insert.

Abstract: A milling disk for a floor machining appliance has a plurality of mounts for holding interchangeable plate-like milling tips, the milling disk being driven for rotation by the floor machining appliance and being held substantially parallel to the substructure to be machined so that the milling tips may bite into the substructure and remove matter from the surface thereof. The milling tips are constituted by ceramic cutting tips.

Abstract: A cutter insert for disc-milling cutters, in particular, for milling crankshafts. The insert has upper and lower surfaces and circumferential lateral surfaces, which connect the upper and lower surfaces to one another. The insert includes raised swellings and/or projections on the upper surface, at least in the region of two corners, which preferably extend over the entire length of one side of the cutter insert, so that, in a view perpendicularly toward a cutting face formed by at least one of the lateral surfaces, the edge which defines the transition from the upper surface to the cutting face, has a portion projecting relative to the central edge section in the region of each of the two ends of this edge.

Abstract: A tangential milling cutting insert having two identical opposing end surfaces with two identical opposing major side surfaces of a generally parallelogrammatic shape and two identical opposing minor side surfaces extending between them. Each end surface has a peripheral edge containing cutting edges and four corners of which two diagonally opposed corners are lowered and the other two are raised. Each end surface is provided with an abutment member having an abutment surface. In each cross section of the cutting insert taken in a plane parallel to a minor plane of the cutting insert, the abutment surface is closer to the median plane than a respective leading section of a major cutting edge.

Abstract: A tangential milling cutting insert having two identical opposing end surfaces with two identical opposing major side surfaces of a generally isosceles trapezoidal shape and two identical opposing minor side surfaces extending between them is disclosed. Each end surface has a peripheral edge containing cutting edges and four corners of which two diagonally opposed corners are lowered and the other two are raised. Each end surface is provided with an abutment member having an abutment surface. In each cross section of the cutting insert taken in a plane parallel to a minor plane of the cutting insert, the abutment surface is closer to a median plane than a respective leading section of a major cutting edge.

Abstract: A cutting insert comprises first and second polygonally-shaped main faces arranged substantially parallel to one another, and a side face structure interconnecting the first and second main faces to define a peripheral edge. At least the first main face includes at least one projection extending to the peripheral edge, the projection formed by: a portion of the first main surface (defining a relief surface), a portion of the side face structure (defining a rake surface), and a portion of the peripheral edge (defining a cutting edge). The insert includes support surfaces defined by a portion of the second main face, and by portions of the side surface structure other than the rake surface.