Abstract: The present invention relates to a copying cutter provided with a cylindrical or conical body having a spherical end, constituting the active portion of the cutter, said end including a plurality of flutes inclined at a determined angle .theta. relative to the longitudinal axis of the cutter and formed along circular arcs at a determined distance x from the midplane P of the cutter, an inside face and an outside face of each of the flutes constituting, after machining, respectively a cutting face and clearance faces of each tooth of the cutter.The clearance faces comprise a first clearance face and an additional clearance face presenting at least a first facet. The cutting face has a cutting angle .gamma. given by the following equation: ##EQU1## where R is the radius of the cutter. The present invention also relates to a method of manufacturing the cutter.

Abstract: An insert made of an ultra-high-pressure sintered compact and including no base metal or support layer is brazed to a tool body under vacuum by use of a Ti-containing activated silver brazing filler metal. This method permits the insert to be securely fixed to the tool body without fear of the insert coming off the tool body even if the tool is a helical one. Because no base metal layer is needed, the manufacturing yield, efficiency and productivity are improved.

Abstract: A milling cutter is provided including a tool holder and a cutting tool insert. The tool holder includes a mounting end portion and a cutting end portion. The cutting end portion includes a slot defined by first and second diagonal surfaces provided in an end of the cutting end portion. The first and second diagonal surfaces form a substantially V-shaped pocket for receiving the cutting tool insert. The cutting tool insert includes a substantially flat body member having a first side having a cutting surface on one edge thereof and a second identical side having a cutting surface on one edge thereof. A hole is provided through the body member from the first side to the second side. First and second surfaces are provided adjacent and substantially perpendicular to the first and second sides. The first and second surfaces define a V-shaped seat portion for seating the cutting tool insert in the V-shaped pocket of the tool holder.

Abstract: An end mill (10) has a cylindrical shank (12) with a longitudinal axis (22). Attached to the cylindrical shank (12) is a center flute (14) having a cutting edge (18) extending beyond the longitudinal axis (22). A non-center flute (16) is also attached to the cylindrical shank (12). The center flute (14) has a first rake angle (32) and the non-center flute (16) has a second rake angle (32) not equal to the first axial rake.

Abstract: A chip cutting tool for rotary machining operations comprising a tool holder formed with an insert retaining pocket adjacent a leading end thereof and a cutting insert clampingly and releaseably retained therein. The cutting insert has top and base surfaces, two pairs of opposite major and minor side surfaces and at least one cutting edge defined at an intersection between an upper, relief flank surface of a first major side surface and the top surface of the insert. The cutting edge has first and second cutting edge portions, the relief flank surface of the cutting edge at least adjacent the second portion thereof being directed at an internal acute angle to the insert base surface. At least a portion of the second major side surface of the insert is substantially co-directional with the second portion of the cutting edge.

Abstract: The cutting end or head of a helically grooved drill bit is of generally hemispherical shape and has four cutting lips, two of which are disposed in end-to-end relationship at the point S of the bit. The cutting angle of the edge of each lip is evolutive, varying from 0.degree. at the point S to a value, determined experimentally in accordance with the material to be machined, at a position P at the intersection of the cutting edge with the end of the outer diameter d of the bit.

Abstract: A spiral end mill which can mill a substantially sharp inside corner of a work surface and attain a stable working accuracy for a long time. The spiral end mill has a hard sintered compact insert portion, a negative relief face a first circular land provided along the outer periphery of the insert portion, and a second circular land on the negative relief face so as to be continuous with the first circular land. The widths of the two circular lands may be the same as or different from each other, and the helix angle of a back line of the second circular land is less than that of the first circular land. A method of manufacturing the spiral end mill involves machining a relief angle in the outer periphery of the insert portion while changing the helix angle between the negative relief face and the rest of the outer periphery.

Abstract: A center cutting or plunging end mill or ball nose end mill has one or more spiral grooves and flutes in the walls of a mill body of cemented tungsten carbide. Each groove includes polycrystalline diamond or cubic boron nitride formed in situ along a leading edge of each flute. Such a groove extends across the cutting end of the mill so that the mill can be used for center cutting or plunging. The vein of diamond-like material may extend to the center of the mill body or may extend almost all of the way to the center, leaving an area of tungsten carbide exposed at the center of the mill body. A high temperature-high pressure press is used for forming the polycrystalline diamond-like veins in situ within the grooves in the mill.

Abstract: A drill for fiber-filled synthetic plastics has an axially extending body with helical grooves spiraling from a drill point toward a shank end. The grooves define helical lands between them having helical land machining edges. At the point axially tapering land and groove point surfaces converge and land point surfaces with machining edges are radiused to merge gradually with the land surfaces rearward of them. The land machining edges are configured with a negative rake. A plurality of cross notches on the lands extending over an axially extending region of the lands from substantially the axially tapering land point surfaces a predetermined distance toward the shank end are configured to create fiber-snipping crosswise helical cutting edges with a positive rake facing the point.

Abstract: A cutting plate for a ball-head finish miller has a support body of hard metal centered on an axis and having a pair of oppositely directed and symmetrically oriented faces each formed with a respective substantially circularly segmental recess of a predetermined depth. A pair of substantially identical and substantially circularly segmental cutting inserts are each secured to a respective one of the faces in the respective recess and each have a respective cutting layer forming a cutting edge. The inserts and their edges are symmetrical with respect to the axis and are each of a thickness substantially less than the depth of the respective recess so that each forms a chip cavity on the respective face.

Abstract: A rotary cutting tool is disclosed having an evacuation bore and generally radially extending passages to conduct away material being removed by the tool cutters. In one embodiment, intersecting cutters are disposed at the intersections of right and left hand flutes in the tool shank. In another embodiment, the cutters are radially disposed on a cutting disc.

Abstract: A flat drill bit having a shaft with an axis of rotation and a flat drill bit head connected to the shaft. The flat drill bit head includes opposing flat front and back faces, left and right edgewalls between the front and back faces, and a bottom endwall connected to the left and right edgewalls. The left and right edgewalls are angled relative to the front and back faces so as to define left and right cutting edges that are parallel to the axis of rotation. The bottom endwall includes left and right sections, each being angled in opposite directions relative to the front and back faces so as to define left and right bottom cutting edges. The bottom endwall of the drill bit head has a rounded shape thereby providing curved left and right bottom cutting edges. In an alternate embodiment the bottom endwall is generally straight, thereby providing straight left and right bottom cutting edges.

Abstract: A chip cutting tool for rotary machining operations comprising a tool holder formed with an insert retaining pocket adjacent a leading end thereof and a cutting insert clampingly and releaseably retained therein. The cutting insert has top and base surfaces, two pairs of opposite major and minor side surfaces and at least one cutting edge defined at an intersection between an upper, relief flank surface of a first major side surface and the top surface of the insert. The cutting edge has first and second cutting edge portions, the relief flank surface of the cutting edge at least adjacent the second portion thereof being directed at an internal acute angle to the insert base surface. At least a portion of the second major side surface of the insert is substantially co-directional with the second portion of the cutting edge.

Abstract: A cutting tool for cutting a honeycomb core having a plurality of spiral blades each of which is formed integratedly with a cylindrical body of the cutting tool and has a lead angle of 60 degrees and more with respect to an axis of the cylindrical body. Each of blades comprises a radial edge with a lip angle ranging from 1 degree to 20 degrees along the periphery of the cutting tool and a bottom edge with a lip angle ranging from 1 degree to 20 degrees at the bottom of the cutting tool. The bottom edge curved outward in the revolutional direction of the blade.

Abstract: A router bit includes a generally elongate body portion, a shank portion for mounting to a rotating machine, and a knife support head disposed oppositely from the shank portion. The knife support head includes a pair of recesses formed therein to accept interchangeable knives which are adjustable longitudinally to compensate for knife wear and loss of diametrical dimension due to resharpening of the knives.

Abstract: There is provided a solid ball nose tool comprising a hard material with 30-70 volume % submicron hard constituents in the form of carbides, nitrides and/or carbonitrides of Ti, Zr, Hf, V, Nb, Ta, Cr, Mo and/or W in a metallic matrix based on Fe, Co and/or Ni. The tool has a constant positive rake angle along the whole end radius of +8+2.degree. and a continuously decreasing clearance angle and towards the center where it is 10.+-.2.degree..

Abstract: A cutting tool particularly adapted for machining brittle plastics in which the cutting head has its cutting edges in the first and fourth quadrants of the x-y axes and contained in a common plane on opposite sides of the axis of tool rotation. The cutting edges are on two planar inserts, which can be either integral or separate elements, which meet at the common plane and each of which is relieved or cut away in the opposite quadrant from its own cutting edge to expose the cutting edges of the other. The walls defining the reliefs have 2 or more non-aligned sections forming different angles with the axis of rotation with the steepest angle beginning at the axis and preferably inwardly of the tip of the tool and, overall, exposing not less than a full quadrant of the cutting edge of the other insert while providing cavities and contours which control the movement of the chips and the flow of coolant fluids.

Abstract: A drilling/cutting bit for forming joints in wooden members to be connected together by a coupling. The bit simultaneously forms a smaller width slot, a larger width slot, and a curved transition between the slots.

Abstract: A drill/cutting tool for making joints in wooden members for receiving a metal plate connector. The drill/cutting tool can bore a hole, and then simultaneously cut a smaller width groove and larger width groove from the hole to complete forming the joint. Also, a method of making a joint in wood members.

Abstract: A balance adjustment method of an end mill for increasing the accuracy of the machined surface and also for lengthening the tool lifetime, in which mass unbalance between an end gash part of a primary cutting edge and an end gash part of a secondary cutting edge of the end mill having asymmetric cutting parts is balanced by decreasing an end gash angle, an end gash part, a clearance angle or a corner of tooth face of the secondary cutting edge.

Abstract: A cut or slit is provided in the holder generally perpendicular to the actual opening through the holder in which the shaft of an engraving quill is held. The cut or slit completely intersects the opening and divides the cut portion into two sections of unequal thickness. Means are provided for opening or closing the slit to thereby engage and disengage the quill shaft. This means is provided by a pair of set screws; one in the portion of the holder above the slit and one in the portion of the holder below the slit. A polymer insert is provided for smoothly engaging the shaft of an engraving quill when the slit is forced open. It is on the opposite side of the opening from the set screws. Turning a set screw causes the thinner portion of the cut holder to bend locking an engraving quill shaft.

Abstract: A reamer for shaping a socket, such as a hip socket, comprising a cutting head located at one end of a rotatably driven shaft and having a hemispherical portion with a hemispherical exterior surface. The hemispherical portion containing an open substantially hollow chamber and helical openings such as slots, in said hemispherical portion connecting between the exterior surface and the chamber. The trailing portion of each of the openings having a cutting or trailing edge raised slightly above the leading edge of the opening or slot to move material from the socket into the chamber during rotation of the cutting head. The cutting edges having serrations thereon. At least two cutting edges extending across the polar region of the cutting head. A stem extending from the interior center point of the substantially hollow chamber and extending along the polar axis of the hemispherical reamer for connecting and disconnecting the cutting head to a rotatable source.

Abstract: A router bit for laterally cutting through sheets of wood product, such as plywood and the like. The bit includes a shank portion adapted to be gripped in the chuck of a router, a fluted portion, and a tip. The fluted portion has two helical left-hand flutes. Each flute has a cutting edge and a web portion having a convex surface that extends rearwardly and immediately inwardly from the cutting edge, without a land, in a continuous curve. The flutes are formed by parabolic grinding. In one embodiment the tip is conical in shape and has two diametrically opposed tip flutes for cutting axially into a workpiece. In another embodiment the tip is flat and the bit is adapted only to cut laterally through the workpiece.

Abstract: A highly stiff end mill comprising a shank, a plurality of helix cutting edges on the periphery of the end mill, the end mill being characterized in that a radial rake angle of the helix cutting edges in a cross section perpendicular to the longitudinal axis of the end mill is set in the range of -29.degree. to 0.degree. and a core diameter of the end mill is set in the range of 70 to 90% of the outside diameter of the end mill.By selectively determining the negative rake angle in the range described above, this end mill is applicable to hard materials and has general-purpose properties. The improper factors of the end mill, such as increased cutting resistance, can be compensated for by setting the core diameter thereof to the range described above. This end mill is also structured to be able to cut materials with less hardness values as well as hard materials, thereby covering a wide range of applications.

Abstract: Methods and apparatus for prosthetic knee replacement permit preparation of tibial plateau and femoral condyle surfaces and implant of tibial and femoral protheses components with the use of arthroscopic surgical techniques. The bone surfaces are resected by moving a rotating milling cutter longitudinally across the bone surface and moving the rotating milling cutter substantially laterally across the bone. Cement is supplied between the prostheses and the bone surfaces after positioning of the prostheses on the bone, and cement bonding is enhanced by applying suction to the bone to draw the cement into the bone. The apparatus for resecting the bone surfaces includes a rotating milling cutter having a body with cutting edges and holes extending through the body communicating with the interior of the body. Suction is applied to the end of the body to draw out tissue fragments through the holes and out of the body.

Abstract: A disposable cutter which has a plurality of cutting edges. The cutter has perforations adjoining the cutting edges. The cutter defines an axis of rotation. The cutter is joined to a transparent bowl. The bowl is concentric with the axis of rotation. The bowl has a bottom tool driver opening concentric with the axis of rotation.

Abstract: A rotating tool for the cutting of hardened workpieces is comprised of a base body made of steel and having a working surface. The working surface is coated with a homogeneous layer of an extremely hard material. The layer has a uniform thickness. The working surface has a plurality of microcutting grooves that extend parallel to one another and at an acute angle relative to a tangent of the working surface. Each microcutting groove has a cross-sectional profile with a cutting edge and a chip space. The extremely hard material is preferably boron nitride and the base body is preferably made of hardened steel.

Abstract: A tool having a shaft with a longitudinal axis and opposite ends. A boss is positioned at one of the ends. A tool collet is positioned at the other of the ends. A bore is in the boss end. The boss has a pair of pins that extend from opposite sides of the bore. A cutting lid with cutting edges on its top and a pair of bores passing therethrough. The cutting lid can be positioned on the pins and locked onto the boss, whereby upon rotation of the tool driver, the cutting lid is securely held in operable position on the tool driver throughout the operation and may be easily removed when desired.

Abstract: There is disclosed a ball end mill which has a hemishepherical portion formed at a front end of an end mill body. A pair of tip mounting seats are formed at the hemishepherical portion. A main throw-away tip and a second throw-away tip are secured on the tip mounting seat respectively such that the axial rake angle of the main tip is set at a negative angle and the axial rake angle of the second tip is set at a positive angle. There is also disclosed a second ball end mill. In the second ball end mill, only a main throw-away tip is secured on a tip mounting seat. The axial rake angle of the main tip is set at a negative angle. One or more chip breaker grooves are formed on a rake face of the tip.

Abstract: A spot drilling and centering drill including a body having a cylindrical head portion and a replaceable indexable insert mounted in the head portion. A V-angled slot is formed directly in the head portion. The insert has two V-angled cutting surfaces with a drill point, each cutting surface fitting within the V-angled slot to locate the drill points on the centerline of rotation of the drill.

Abstract: The invention relates to a cutting tool having twisted edge in a blade part, having a sintered compact with higher hardness and higher wear resistance than a base sintered body buried and affixed along the twisted edge, and its manufacturing method. The blade part of the cutting tool comprises the base sintered body having a twisted groove in the position of forming the twisted edge on the outer circumference, and the sintered compact of high harndess and high wear resistance applied and buried in the twisted groove and affixed to the base sintered body by sintering, and the twisted edge is formed on the sintered compact of high hardness and high wear resistance.

Abstract: A tool for cutting an access hole in plasterboard which is mounted to a wall stud. The tool includes a housing portion, a plug or connector portion and a cutting element such as a screw which has a head and a threaded shank. The housing portion has an exit opening, an interior cavity which forms a seat for the head of the cutting portion and a bore which extends from the exit opening to the cavity. The shank of the screw extends freely through the bore and beyond the exit opening. The plug or connector portion of the tool is threaded into the housing and engages the head of the screw for fixing the screw relative to the housing and includes a shank for insertion into the jaw or chuck of a rotary drive mechanism for rotating the cutting element about its central longitudinal axis.

Abstract: A router type cutter (1) has at one end thereof a drive spigot (2) adapted to be clamped in a rotatable toolholder of a machine tool, at least one helix (3) extending part-way along the cutter (1) from the other end, onto a cutting edge of which helix (3) is brazed a tungsten carbide insert (10) having a non-linear cutting profile along its end face (12).

Abstract: A cutting tool which can be used for milling metals, metal alloys and for woodworking. The cutting tool includes a shaft which is attachable to means of rotation and a head portion provided with multiple cutting edges. The cutting tool is capable of cutting in any direction and allows for cutting at increased speeds.

Abstract: A rotary cutting tool is disclosed which has a tool body, a cutting insert, a clamp member and a clamp screw. The tool body has an insert-receiving recess and a clamp member-receiving aperture formed in an outer surface thereof. The insert-receiving recess has a bottom and at least two bearing walls disposed so as to be inclined with respect to each other. The clamp member-receiving aperture is disposed so as to be communicated with the recess. The cutting insert includes a plate having a front face serving as a rake surface and a rear face. The cutting insert is releasably received in the recess with the rear face being mated with the bottom, in such a manner that the front face is partly located in the clamp member-receiving aperture. The clamp member has an axis therethrough and an engagement portion. The clamp member is releasably accommodated in the clamp member-receiving aperture so as to be axially slidable, with the engagement portion being held in abutment with the front face of the cutting insert.

Abstract: A tapered slot end mill comprising a shank and a tapered section having a polygonal shape and disposed at the end of the shank, the tapered section being adapted such that the edge formed at each vertex of the polygonal shape along the axis of the end mill is tapered to have a smaller diameter at the end of the end mill and has a helix form, a pair of end cutting edges formed symmetrically at the ends of the edges, with a part of the edge included in the end cutting edge, and a pair of peripheral cutting edges are respectively provided adjacent to the end cutting edges via rake angle surfaces, and the end mill being characterized in that the helix is formed in the direction opposite to the rotating direction of the end mill.

Abstract: A cutting tool for use in a milling machine, which includes a one unit tip having a pair of cutting edges, a center point of the pair of cutting edges having an inclined angle of 35.degree.-45.degree., and the pair of cutting edges having an inclined angle of 6.degree.-8.degree. for reducing cutting stresses, improving cutting efficiency, and extending the life span of the cutting tool.

Abstract: An end mill for finishing the face or side of hard work comprising a shank, a plurality of helix cutting edges on the periphery of the end mill, and a cutting edge section perpendicular to the axis of the end mill having a polygonal shape with three or more angles, the cutting edge being the edge formed at each vertex of the polygonal shape along the axis of the end mill and being circumscribed by an imaginary cylinder, and the end mill being characterized in that the helix direction of the cutting edge is identical to the rotational direction of the end mill. The end mill of the present invention is able to cut the face or side of the hard work at a feed rate several times higher than that of conventional end mills. Moreover, the end mill of the present invention assures superior surface roughness of finished work.

Abstract: A ball nose end mill comprises a body having a semi-spherical front surface and a plurality of indexable cutting inserts. A central one of the inserts is of generally triangular shape, and the additional inserts are of generally rectangular shape. The central insert has a generally convexly curved top surface, and the cutting edges thereof include main cutting edges which are convexly curved when the central insert is viewed from the side.

Abstract: An end mill is disclosed which includes a tool body having a shaft-like shape. The tool body has a cutting edge portion formed at one end thereof. The cutting edge portion has a plurality of circumferential cutting edges formed on the circumference thereof along the longitudinal axis of the tool body. The end mill is characterized in that the cutting edge portion has the circumferential surface thereof which includes rake faces and flanks. Each of the rake faces adjoins one of two adjacent circumferential cutting edges. Each of the flanks intersects with one of the rake faces at one end and adjoins the other of the two adjacent circumferential cutting edges at the other end. The rake faces have a rake angle arranged between a range of 5.degree. to -45.degree. at a cross section perpendicular to the axis of the tool body. The flanks have a relief angle arranged between a range of 20.degree. to 45.degree. at a cross section perpendicular to the axis of the tool body.

Abstract: A ball end mill is disclosed which includes a tool body having an axis of rotation therethrough and having a forward end portion, and a cutting edge provided on the forward end portion of the tool body and having an arcuate shape as viewed in a direction opposite to the direction of rotation of the tool body. The cutting edge is comprised of a radially inner portion disposed adjacent to the axis of rotation of the tool body and extending radially inwardly of the tool body in a direction opposite to the direction of rotation of the tool body, and a radially outer portion extending from the inner portion radially outwardly and axially rearwardly of the tool body. Each of the inner and outer portions of the cutting edge is formed of a two-layered composite sintered complex having a base layer of cemented carbide and an upper layer of sintered super hardened compact disposed on the base layer and containing cubic boron nitride, diamond or the like.

Abstract: A cutting tool in the form of a drill bit or end-milling tool has an elongated body formed with at least one cutting edge defined by a flank of a flute running primarily along a rotation axis of the body and having leading and trailing flanks one of which is formed with wavelike and spaced projections and recesses. The depth of these grooves and, hence, the height of the projections increases toward the end cutting edge to break up chips.

Abstract: Disclosed is a bit which can be cut both axially and laterally, and which is especially useful to cut an access opening in a sheetrock panel covering an electrical outlet box. The bit self-guides itself laterally around the periphery of the outlet box so that the opening will correspond to the shape of the box. The configuration of the bit permits it to be made in an unusually small diameter so as to minimize the width of the slot it cuts.

Abstract: A cutting tool such as a body drill has a cylindrical shank portion and a body section connected to the shank portion. The twist section terminates at a cutting end. A pair of flutes are formed in the body section, defining a land therebetween. The land includes a narrow margin having a width between 0.015 and 0.025 inches. The land also has a body clearance of a diameter less than that of the margins. The flutes terminate at flute faces at the cutting end. The flute faces are disposed parallel to each other at a zero degree rake angle. The narrow margin aspect of the invention could also be applied to a counterbore or spotface.

Abstract: A diamond tool for combination drilling and routing. The tool has a shaft end and a cutting end with an aperture therein. The cutting end includes abrasive grit on the outer peripheral surface for routing purposes and has abrasive grit on the terminal end and the surfaces forming the aperture for drilling purposes.

Abstract: A specialized, solid, cylindrical tool bit for cleaning uneven surface material from the bottom or floor of a dado channel previously cut in a workpiece. The bit operates at rotation speeds in excess of 10,000 revolutions per minute and has a cutting member having a cutting edge along only the bottom of the cutting member. The cutting edge has four cutting teeth spaced equidistant from each other and circumferentially close to an axis of rotation of the bit. The teeth and body member cooperate to dissipate the heat generated by the high speed rotation of the bit during the cleaning operation of the bit. The entire outer circumferential surface of the cutting member presents no cutting edge for engagement with the side walls of the channel cut in the workpiece. This tool bit performs the task of creating a perfectly flat plane on the bottom surface or floor of the dado channel.

Abstract: An acetabular reamer cup having a cutting bowl having a plurality of singly curved cutting edges. The cutting bowl has a plurality of slots proceeding the cutting edges. The cutting bowl defines an axis of rotation. A bottom is joined to the cutting bowl. The bottom has a tool driver opening concentric with the axis of rotation.

Abstract: A disposable acetabular reamer cup which has a cutting bowl haing a plurality of cutting edges. The cutting bowl has perforations adjoining the cutting edges. The cutting bowl defines an axis of rotation. The cutting bowl has a bottom opening. A polymeric plug is joined to the cutting bowl. The plug is concentric with the axis of rotation. The plug occupies the bottom opening. The plug has a tool driver opening concentric with the axis of rotation.

Abstract: Disclosed herein is a tool bit comprising a shank including a cylindrical base portion having an axis and a diameter, an elongated end portion of generally cylindrical shape and having an axis extending coaxially with the axis of the base portion, a diameter less than the diameter of the base portion, and an outer cylindrical periphery, which shank end portion includes therein a recess extending lengthwise of the end portion and being of right angle shape in a cross-section extending transversely of the end portion axis, which recess cross-section is defined by a long face extending in parallel spaced relation to a radius extending from the end portion axis and including an outer end at the cylindrical outer periphery and an inner end, and a short face extending from the inner end to the cylindrical outer periphery, and a connecting portion joining the end portion and the base portion and tapering from the base portion diameter to the end portion diameter, and a carbide insert brazed in the recess and having

Abstract: An improved rotary cutting end mill which includes an arcuate shaped circular land on the first relief wall which contacts the cutting edge and a slightly angled cutting end. This end mill yields a smooth finished surface on the work piece and can be used at higher rotary speeds. This end mill shows less corner wear, improved rigidity and is operated with less operating noise.