Abstract: A cutting tool comprising a holder and a cutting insert mounted therein. A second bore of the holder extends downwardly from an insert receiving pocket. A third bore extends rearwardly from the second bore and opens into a fourth bore. A locking pin inserted in the second bore protrudes upwardly into the first through bore. A protrusion extends rearwardly from an upper portion of the locking pin. A rearwardly facing groove in a lower portion of the locking pin is co-aligned with the third bore. A plunger is received in the third bore. A forward portion of the plunger is in contact engagement with the groove. A rear portion of the plunger has a first engagement surface transversely directed to a first axis (A) of the plunger. A clamping member, engaged in the fourth bore and having a second engagement surface, is in contact engagement with the first engagement surface.

Abstract: A tool for chip removing machining includes a holder having a top side in which is formed a seat for a cutting insert to be clamped by a clamping mechanism. That clamping mechanism includes a clamping body movable inside a cavity formed in the holder. The body carries a finger which passes through a hole formed in a bottom surface of the seat and engages the cutting insert. A rotatable screw is provided in a bore of the holder and extends into the cavity. The screw is formed with a thick first portion, as well as a thinner second portion having a male thread which is in engagement with a female thread formed in a through-hole of the clamping body. The bore in the holder is cylindrical and has a smooth surface, and the thick portion of the screw has a cylindrical smooth envelope surface which is rotatably mounted in the bore. A free end of the screw is supported by an end wall of the holder. The finger is completely surround by the bottom surface of the seat.

Abstract: A machine tool, which is also suitable for high-speed machining in metal cutting, for which at least one cutting body is held by a clamping device in a plate seat of a tool holder, which is bounded only by a back pressure supporting surface and by a supporting surface, the supporting surface for the clamping device and the supporting surface of the plate seat enclosing an angle, which exceeds the automatic interlocking and opens up to the back pressure supporting surface, wherein the cutting body is provided with a groove, which is engaged by a sliding pin, the diameter of which corresponds essentially to the width of the groove and which is disposed eccentrically and parallel to the axis of rotation of the bearing bolt, which is mounted rotatably in a bearing opening of the tool holder, passing through the supporting surface and/or the back pressure supporting surface, and which can be actuated from the outside.

Abstract: A rotatable tool includes a rotatable body defining an axis of rotation. The body forms a seat configured to receive a cutting insert. The seat includes a bottom surface and a radial support upstanding therefrom. The bottom surface includes a screw-receiving hole which intersects the bottom surface to form a port therein. The screw-receiving hole includes a female screw-threaded portion spaced from the port by a non-threaded portion. A fastening screw secures the cutting insert to the body. The screw includes a shaft having at one end thereof a male screw thread connectable to the female screw threaded portion, and at an opposite end thereof a head. The shaft also includes a non-threaded portion disposed between the male screw thread and the head and sized to be received in the non-threaded portion of the screw-receiving hole.

Abstract: A tool for chip removing machining includes a holder having a top side in which is formed a seat for a cutting insert to be clamped by a clamping mechanism. That clamping mechanism includes a clamping body movable inside a cavity formed in the holder. The body carries a finger which passes through a hole formed in a bottom surface of the seat and engages the cutting insert. A rotatable screw is provided in a bore of the holder and extends into the cavity. The screw is formed with a thick first portion, as well as a thinner second portion having a male thread which is in engagement with a female thread formed in a through-hole of the clamping body. The bore in the holder is cylindrical and has a smooth surface, and the thick portion of the screw has a cylindrical smooth envelope surface which is rotatably mounted in the bore. A free end of the screw is supported by an end wall of the holder. The finger is completely surround by the bottom surface of the seat.

Abstract: The present invention provides a cutting insert pocket in a cutting insert holder for securely retaining a cutting insert. The cutting insert pocket is provided with a base and two angularly disposed insert support sidewalls transverse to the base. A first of the two insert support sidewalls being fixed relative to the base and having two coplanar spaced apart insert location surfaces, a second of the two insert support sidewalls being rotatable about an axis transverse to the base and having two coplanar spaced apart insert location surfaces. This arrangement enables four-point location of the cutting insert in the cutting insert pocket, instead of the usual prior art three-point location.

Abstract: A clamping tool holder includes a tool holder body and a clamp for clamping a cutting insert. The clamp causes the cutting insert to press against the bottom and the side walls of an insert-receiving pocket of the tool holder body. The tool holder body has an inclined surface sloping inward in a direction away from the insert-receiving pocket. The clamp has a sliding face that acts as a ramp with the inclined surface of the tool holder body. A guide pin prevents the clamp from twisting during tightening or loosening of the clamp. When a clamp screw is tightened, the clamp only engages an inside rearward surface of the mounting hole and the rearward top surface of the cutting insert.

Abstract: A tool holder for a cutting insert for chip removing machining includes a base body on which is disposed an insert-receiving seat for receiving a cutting insert. The seat includes an insert-support surface and two side surfaces upstanding from the insert-support surface. A slot forms a rear extension of the seat and includes a bottom surface disposed at a lower level than the insert-support surface. The body includes a wing which forms one side of the slot and one of the side surfaces of the insert seat. The side surfaces of the seat diverge in a direction away from the slot. A screw passes through a hole in the wing and extends transversely to a longitudinal direction of the slot. The screw is threadedly received in a hole formed in a side of the slot disposed opposite the wing, so that a tightening of the screw causes the side surfaces of the seat to more tightly grip the insert.

Abstract: An apparatus is disclosed for releasably holding a toolholder shank having a lockable surface and a releasable surface utilizing an actuating bolt with an associated threaded actuating nut. When the actuating bolt is rotated in a locking direction, the actuating nut is drawn onto the bolt thereby clamping against the lockable surfaces of the toolholder shank. When the actuating bolt is rotated in the releasing direction, a releasing segment acts upon the toolholder thereby ejecting it from the tool support member.

Abstract: An indexable insert is located on a toolholder with reference to bearing surfaces on the insert and the toolholder which are proximate to the active cutting edge. These bearing surfaces are internal to the peripheral (side) flanks of the insert. Location of the insert in the toolholder is substantially independent of the relation between the toolholder pocket sidewalls and the peripheral flanks of the insert, thereby eliminating sources of error from insert manufacture and pocket manufacture. The insert and toolholder have locating units disposed thereon adapted to matingly engage each other when the insert is placed in the toolholder. At least one of the locator elements has a bearing surface or surfaces that extends through 360° and resulting in less movement of the insert during use.

Abstract: A metal cutting tool includes a holder arrangement, an indexible cutting insert seated on an insert-receiving site of the holder arrangement, and a screw for fastening the insert to the site. The bottom side of the insert includes more than two upright abutment surfaces arranged to abut respective upright support surfaces of the site, whereby the areas of contact formed by the mutually abutting surfaces lie inside of an outer perimeter of the insert. The abutment surfaces are oriented non-parallel to one another. The screw is arranged to urge the insert in a direction whereby less than all of the abutment surfaces abut respective support surfaces, and at least one abutment surface does not abut a support surface. When the insert is indexed, the non-abutting abutment surface is relocated and caused to abut a support surface when the screw is tightened, while an abutment surface that previously abutted a support surface becomes a non-abutting surface.

Abstract: A cutting insert toolholder for easy indexing in areas of limited access. In an outer end of the toolholder runs a through channel in which a bent bolt is inserted. The channel extends through the toolholder and is open at an outer end of the toolholder.

Abstract: A metal cutting tool includes a holder arrangement, an indexible cutting insert seated on an insert-receiving site of the holder arrangement, and a screw for fastening the insert to the site. The bottom side of the insert includes more than two upright abutment surfaces arranged to abut respective upright support surfaces of the site, whereby the areas of contact formed by the mutually abutting surfaces lie inside of an outer perimeter of the insert. The abutment surfaces are oriented non-parallel to one another. The screw is arranged to urge the insert in a direction whereby less than all of the abutment surfaces abut respective support surfaces, and at least one abutment surface does not abut a support surface. When the insert is indexed, the non-abutting abutment surface is relocated and caused to abut a support surface when the screw is tightened, while an abutment surface that previously abutted a support surface becomes a non-abutting surface.

Abstract: A cutting insert for chip-breaking metal machining includes an upper chip surface, a lower bottom surface, which is substantially plane parallel with the chip surface, one or several side surfaces that extend between said chip and bottom surfaces, and a through hole (12) for the accomodation of a locking screw (11). The hole (12) includes a rotation-asymmetrical portion (16) including a plurality of radially bulging portions (17) extending in the direction of the hole, the transitions (18) extending substantially in the direction of the hole between adjacent bulging portions being intended to pairwise abutting against the locking screw (11) and guiding the insert towards the right positioning in an insert seat, before the insert is clamped. In this way, it becomes considerably easier to position the cutting insert, particularly when it has a larger number of cutting edges, e.g. six or eight.

Abstract: In a small-shank cutting tool for an automatic lathe or like turning machine, the tool shank defines at least one tool-supporting region having a width of less than 9 mm on a tool-supporting end of the shank. The tool-supporting region defines a tool recess formed by two tool-supporting surfaces oriented at an acute angle relative to each other. A rhomboidal-shaped tool insert of the cutting tool is seated within the tool recess of the shank with two sides of the insert each engaging a respective tool-supporting surface of the shank, and a substantial portion of the other two sides of the insert extending beyond the end of the shank and forming a cutting tip for cutting a workpiece.

Abstract: The present invention relates to a tool for chip removal including a holder and a cutting insert provided with a through-hole to abut against a base surface and support surfaces in a cutting insert pocket in the holder. A locking pin threaded into a boring in the holder is received by the insert hole. The pin includes a head, a waist, a conical portion, and a threaded portion, which pin portions have a common center axis in an unloaded condition. The locking pin is of a quick action type. The boring includes an eccentric conical recess provided to displace the cutting insert in a direction towards the support surfaces in cooperation with the pin during tightening of the pin in the threaded part of the boring. The pin is provided to be able to secure both negative and positive cutting inserts in the insert pocket, by the head and the waist at a final phase of the pin tightening provided to elastically bend in a direction from the support surfaces.

Abstract: A throwaway ball end mill comprising an end mill body and a tip pressed by a clamp screw onto a cutout formed at the forward end of the end mill body. The cutout is formed in a longitudinal direction with respect to the end mill body, and a pair of lateral regions forked by the cutout have opposite flat surfaces, the lateral regions have clamp holes formed in a direction making a right angle with the cutout, one clamp hole has a conical surface extending toward the periphery of the corresponding lateral region, and the other clamp hole has a female thread formed therein,the centerline of the conical surface is deviated from that of the clamp holes toward the base end of the end mill body. When the clamp screw is tightened with the tip inserted in the cutout, the tip is pressed against the end of the cutout accordingly, and at the same time one lateral region is bent toward the other lateral region.

Abstract: A cutting insert (2) having a tip bit. (5) and a tabular tip body (4) supporting the tip. The cutting insert (2) is used by being mounted to the body (1) of a cutting tool. Wherein, the tip body (4) has a plurality of elastic deformation sections (8) separated by a slit (6) which extends on a transverse line from a corner to an area near another corner. The elastic deformation sections are moved closer together and elastically deformed within a plane which includes the tip body 4 when being mounted to the tool body 1. And, the opposing faces of the elastic deformation sections (8) have engaging sections (10) for engaging the tip bit (5).

Abstract: A metal cutting tool comprising a tool holder formed with at least one insert receiving pocket and a replaceable shim formed by powder pressing and sintering and having an elongated rib formed integrally therewith along an edge thereof and being releasably retainable in an elongated recess formed along an edge of said pocket.

Abstract: Disclosed is a lathe cutting tool assembly found of a tool holder which has a seat to accommondate a cutter insert, the cutter insert being provided with a clamping groove or bore. The insert is held in the tool holder by a clamping shoe. The clamping shoe is tightly secured to on the tool holder. To protect the clamping shoe and improve the seating of the cutter insert in the tool holder, a clamping plate is secured to the clamping shoe and lies upon the cutter insert. A projection is provided on the bottom of the clamping plate facing the cutter insert and is in clamping contact with the groove or bore. The tool assembly is especially adapted for a turning chisel.

Abstract: In a small-shank cutting tool for a Swiss-type automatic lathe, the tool shank defines a square cross-sectional shape having a width of either 7 mm or 8 mm, and a tool recess defined at one end of the shank by two tool-supporting surfaces oriented at an acute angle relative to each other. A rhomboidal-shaped tool insert of the cutting tool is seated within the tool recess of the shank with two sides of the insert each engaging a respective tool-supporting surface of the shank, and a substantial portion of the other two sides of the insert extending beyond the end of the shank and forming a cutting tip for cutting a workpiece.

Abstract: A cutting insert is formed with a plurality of cutting edges, a cutting surface spaced inward from the cutting edges, and a continuous land having an outer periphery at the cutting edges and a curved inner periphery spaced inward therefrom and outwardly delimiting the cutting surface. The land dips at the inner periphery generally centrally of each edge toward the surface and thereby forms generally centrally of each edge at the inner periphery a region of minimal height above the surface.

Abstract: A cutting insert has top and bottom surfaces and a center hole extending between those surfaces. The insert is seated in a pocket of a toolholder. A clamp is attached to a body of the toolholder by a screw which extends through a through-hole of the clamp and is threadably engaged with the body. An inner end of the clamp engages the body, and a projection at the outer end of the clamp enters the center hole of the insert. When the clamp is tightened, it is displaced downwardly such that a planar under surface of the clamp pushes downwardly against the insert, and is also displaced inwardly so that the projection of the clamp pushes the insert rearwardly against an upright support surface. The inward displacement of the clamp is achieved by causing the inner end of the clamp to engage an inclined surface of the body, or by causing a head of the screw to displace the clamp inwardly.

Abstract: A cutting bit formed as a round plate for a material removal tool has a base body, which is defined by a bottom face, a top opposite it and spaced apart from it, and a side face between them. The side face, with a chip face located on the top, defines a circular cutting edge. For securing the bit, a central opening which can receive a securing screw, for instance, is provided. To secure the cutting bit in a tool body in a manner fixed against relative rotation, a plurality of depressions, for instance, are provided on the top of the cutting bit and can be engaged by a clamping claw supported on the tool body. Circumferential forces engaging the cutting bit are diverted by way of these depressions, thus preventing torsion or twisting of the cutting bit.

Abstract: A debarker arm for a debarking machine, comprised of a crescent shaped member, a debarker arm support, an outwardly forwardly extending flange, a debarker tip receptacle, and a debarker tip seated in said receptacle, the invention comprising said outwardly forwardly extending flange extending above and forwardly of said debarker tip in the direction of incoming logs.

Abstract: To support an indexable cutting insert (6a) cutting with an end edge and facing edge (7a) as well as circumferentially, with respect to both axially acting forces as well as radially acting forces, the tool body (1) is formed with an abutment surface (17) to accept radially directed forces against which the insert can be clamped; to accept axially directed forces, a holding screw (25) passing through an opening (22, 23) in the insert is formed with an accurately machined portion (28) fitting into an accurately machined portion (29) of a reception bore (27) for the screw, so that the holding screw, itself, acts as an accurately placed axial support for the insert (6a).

Abstract: A cut-of tool comprises a thin holder plate of steel, and a cutting insert of cemented carbide. The holder plate has an outwardly opening, insert-receiving recess defined by a bottom wall, an inner wall and an upper wail which is part of an elastically movable clamping arm serving to retain the insert in the recess. The insert has both upper and lower grooves of V-shaped cross-section, which are adapted to cooperate with corresponding V-shaped ridges associated with the recess. Between the insert and the bottom wall of the recess, there is provided a dismountable spacer element of cemented carbide, which has on its upper side a V-ridge for engaging a corresponding V-groove in the underside of the insert. The spacer element is maintained in place, on the one hand, by a countersunk connecting device in the area of the outer end of the bottom wail and, on the other hand, by a male-female connection between the inner wall of the recess and a rear end of the element.

Abstract: In a tool arrangement, an end part of a holder shaft is provided with a seat which provides a stable support for a cutter insert in at least two of the principal directions utilized in a machining operation. Stresses imposed on the cutter insert during the machining operation are transferred in an effective fashion to the shaft. The arrangement includes at least one tightenable fastening device which, after tightening, engages with the cutter insert and forces it against at least one surface of the seat. The cutter insert has stop parts with which the fastening device is intended to engage only after the cutter insert, through displacement relative to the seat on the shaft and whilst the cutter insert still in contact with the seat, has reached its operating position.

Abstract: A metal cutting insert comprises a top surface which is intersected by a frusto-conical edge surface to form therewith a round cutting edge. Five equidistantly spaced flat facets are formed in the edge surface. Upper ends of the facets are spaced below the cutting edge. A fixing screw secures the insert to the seat of a holder, such that two of the facets are pressed against respective flat contact areas formed on a locating surface of the holder. Each facet forms an acute angle relative to a central axis of the insert.

Abstract: A throw-away cutting tool is disclosed. The tool body of the cutting tool consists of a rod-like shank and a bit mounting component arranged at the front end of the shank. The shank is made of cemented carbide, and is formed with a mounting wall extending toward the front end of the tool body. The bit mounting component is made of steel or sintered metal, and is formed with a bit mounting seat defined by a bottom wall and side walls. In the above cutting tool, high resistance against the cutting force produced by cutting operation can be obtained and separation of the shank and the bit mounting component can be prevented; and high rigidity of the tool body is ensured, the damping capacity of the tool body is increased, and therefore vibration and chatter of the cutting tool can be effectively prevented.

Abstract: A gear cutting tool has a series of separate cutter inserts removeably clamped to the front ledge of a holder block. Each cutter insert has a forward cutting edge that extends beyond the ledge and a rear positioning portion that includes a central projection extending rearwardly from side faces. The central projection mates with a respective one of a series of parallel tracks formed in the holder block and the rear faces mate with upright front walls at the rear of the ledge on either side of the track. The arrangement precisely locates the cutter insert in the holder block. The holder block may be formed of a single piece or may be built up of identical interlocking block elements.

Abstract: A cutting insert is mounted on a holder by means of a locking screw which enables inserts to be exchanged without completely removing the screw from the holder. The insert has a through-hole configured such that a lower end thereof is of cylindrical configuration and includes a tapered section located thereabove. The tapered section expands in cross-section in an upward direction. The locking screw includes a head, the outer surface of which engages the through-hole at diametrically opposite contact locations and imposes a downward force on the insert at each contact location. In one embodiment, the head includes cylindrical surface portions which engage the through-hole at both contact locations. In another embodiment, the head includes a surface expanding in cross-section in an upward direction which engages the through-hole at both contact locations.

Abstract: A unidirectional insert lock for securing an insert, with a central mounting hole, to a pocket in a cutting tool is provided. The insert lock includes a locking pin having an eccentric and a radially extending lobe, and a shim having an arcuate channel angularly bordered by a first and second stop, that is configured to receive the lobe. The locking pin is inserted through holes in both the insert and the shim so that when the lobe is rotated in one direction the eccentric urges the insert into a secured cutting position within the pocket. However, when the lobe is rotated in the opposite direction the second stop prevents the pin from sufficiently rotating so that the eccentric is not able to urge the insert against the sides of the pocket, and consequently, the insert sits loosely in the pocket so that it is clear to the operator that the insert is not secured in the cutting position.

Abstract: A metal cutting tool having a tool holder and a pocket formed in the tool holder in which an insert is to be replaceably retained, there being formed in the tool holder an elongated tubular recess which opens into the pocket and there being furthermore provided a replaceable element having a split tubular coupling portion formed integrally therewith so as to be insertable upon spring-like compression into the tubular recess. This replaceable element is preferably constituted by an insert seating shim.

Abstract: An insert clamped tool includes a tool holder, a cutting insert, a clamp and a pressing mechanism for pressing the clamp to urge the cutting insert against the bottom and the side walls of the insert-receiving pocket. The tool holder includes an insert-receiving pocket formed at a forward end thereof and having a bottom and side walls. The tool holder has an inclined surface sloping inward in a direction away from the insert-receiving pocket. The cutting insert is received on the insert-receiving pocket. The clamp is held into abutting engagement with the cutting insert. The clamp has a sliding face held in contacting engagement with the inclined surface of the tool holder.

Abstract: A threadmilling tool is described, of the type that includes a thread cutting insert 14 (FIG. 1) that mounts on an insert holder 12 which is turned by a milling machine, wherein the insert provides four separate cutting edges 30-36 and can be accurately relocated on the holder. The insert has a cross-section forming a mount portion 50 (FIG. 5) with six straight locating sides 51-56 lying on the sides of an imaginary bisymmetrical polygon 58, and forming a radially outwardly-extending arm 60, 62 at each corner of the polygon. Each arm has an outer border 70 and a pair of opposite sides 72, 74 that extend largely radially from the axis 24 of the polygon, and each arm forms a cutting edge (e.g. 30) at the intersection of the outer border and each side of the arm. A tool holder 16 (FIG. 2) for holding the insert, has walls forming, in cross-section, a pair of straight holder positioning surfaces 80, 82 that abut a pair of insert locating sides, while avoiding contact with the arms 60, 62.

Abstract: A shaper cutter includes a body having teeth formed around its periphery and further includes a thin wafer disposed against a conical face of the body and formed with peripheral cutting teeth which lie against the teeth of the body, the teeth of the wafer serving to cut a workpiece and being backed by the teeth of the body. As the wafer is clamped to the body, it is flexed from a flat condition to a deflected condition in which the wafer lies against and conforms to the conical face of the body. To hold the deflected wafer in a rigidly fixed angular position on the body, a pin which is anchored to the body projects into a hole in the wafer. The hole is specially located and configured to coact with the pin to orient the wafer angularly relative to the body prior to deflection of the wafer and then to establish substantial areas of surface contact with the pin after deflection of the wafer.

Abstract: A tool for use with a tool holder has a body to which at least one blade such as a circular saw blade or milling cutter is clamped to prevent the blade from turning when a selected tooth is brought into cutting or grooving contact with a rotating work piece, the body of the tool has first and second parallel clamping surfaces through which a diametric slot opens. A first clamping member has a hub on which a blade is rotatably mounted and which fits the slot and is held thereby against turning. The two clamping members are connected by a threaded member by which the clamping members are drawn towards each other to clamp the blade against the first clamping surface. A member threaded radially through the body extends into the slot and is operable to move the hub radially with respect to the center thereof enabling positions of a tooth relative to the work piece to be precisely established. When more than one blade is mounted on the hub, the blades are held apart by a spacer.

Abstract: A tool device has a toolholder and a profile tool detachably secured to this, both of which comprise stops cooperating with one another for the precise positioning of the cutting profile of the profile tool relative to the toolholder which can be mounted on a machine tool, the stops being constructed in the form of mating surfaces. At least one adjusting element is provided between the toolholder and the profile tool to bring the profile tool to bear on the mating surfaces on the toolholder.

Abstract: The present invention concerns to a clamped cutting tool used in the metalworking field. The clamped cutting tool includes a tool-holder, a shim member placed on the tool-holder, a cutting insert placed on the shim member, and a locking pin held in engagement with the tool-holder for clamping the cutting insert. The tool-holder includes a forward end portion having an insert receving recess formed therein, the recess having a bottom wall and at least one side wall extending upwardly from the bottom wall, the bottom wall including a pin-receiving hole of a circular cross-section formed therein so as to extend downwardly. The shim member has a bore of a circular cross-section formed therethrough, the shim member being disposed on the bottom wall of the recess in such a manner that the bore communicates with and is concentric to the hole of the tool-holder.

Abstract: A replaceable insert cutter comprising a cutting body, a plurality of insert pockets in the periphery of the body, each pocket having an insert back locating wall establishing insert circumferential position, a V-shaped support seat establishing a radial and axial position of the insert in a radial threaded screw hole extending through from the V support seat, a cutter insert mounted in the pocket having a back surface engaging the back locating wall, a V base of the insert seated on the support seat, a screw hole and screw extending radially through the insert and retaining engagement with the threaded screw hole, and a radially outermost cutting edge facing circumferentially away from the back surface.

Abstract: A drill for chipforming machining comprising a drill body (11), two cutting inserts (12, 13) and screws (14, 15). The cutting inserts are screwed to cutting insert sites (18, 19) in the axially forward end of the drill (10). The screws force the cutting inserts radially outwardly during tightening until a shoulder (28) at the lower side of each cutting insert abuts against a vertical support surface (22) on the drill body (11). The cutting inserts are tangentially mounted, i.e. they have holes for accomodating the screws, which terminates in the chip surfaces of the cutting inserts.

Abstract: The present invention entails a combination tool holder designed to accept various different cutting inserts, shims and shim securing devices. In particular, the tool holder is provided with a shim and shim securing assembly that maximizes shim bearing surface and therefore is suitable for supporting cutting inserts that tend to be brittle and relatively low in transverse rupture strength.

Abstract: A parting tool is provided having a tool shank and an interchangeable blade support connected thereto. The blade support is equipped with a blade attachment of blade. The blade support makes contact along one side thereof with a broad-side of the tool shank. The blade support has narrow sides which are guided, at least on sections, by two guide surfaces of the tool shank typically disposed on flanges. Flat contact surfaces on said flanges perpendicularly disposed in relation to the broad side of the tool shank butt against two corresponding counter guide surfaces on said blade support and are pressed against each other by clamping means such as longitudinally off-set screws. In comparison with earlier parting tools used for the same applications, the parting tools of the invention can be made smaller in overall height and provide extremely stable connection between the blade support and the tool shank, thereby greatly reducing rattling and vibrations during normal cutting operations.

Abstract: A double retention pin assembly for securely locking a cutting insert in a recess of a cutting tool wherein the cutter body has an axial hole having a biaxial orientation, a primary retention pin is inserted into the axial hole along one of said axes and then angled with respect to said axis, and a secondary retention pin insertable into the axial hole of the primary retention pin and having the same angular orientation as the angled primary retention pin, said secondary retention pin exerting both a radial and axial locking force against the cutting insert.

Abstract: This invention relates to a device for releasably clamping a cutting insert on a tool-holder. A screw having a threaded shank adapted to be screwed in a tapped hold in the tool-holder passes through an eccentric cylindrical hole in the insert. The head of the screw includes, from the shank, a truncated bearing surface, a cylindrical bearing surface and a shoulder. The screw head cooperates with the edge and the wall of the eccentric hole in the insert to press the sides of the latter against the lateral stop faces of the tool-holder and the base of said insert against the bearing face of said tool-holder.

Abstract: A tool holder for holding a replacable tool bit having a body part and a cutting edge, the tool holder having a body provided with first and second clamping members which co-operate, in the use, to clamp the tool bit to the body, the first clamping member having a tool bit engageable portion for engagement with the body part of the bit, a fulcrum portion in engagement with the tool holder body and a load applying portion whereat a load is applied to the first clamping member to cause the member to pivot about the fulcrum and so urge the bit, in use, towards the second clamping member. In one version the tool bit is of polygonal shape in side elevation and has a cutting edge at each corner of the polygon, so that a selected one of the cutting edges may be brought into an operative postiion relative to the tool holder by rotating the bit about the first clamping member so that the selected edge is presented to a work piece for cutting engagement therewith.

Abstract: A drill provided with means for effecting a secondary cutting function, such as chamfering, counterboring and/or countersinking. The drill (10) comprises chip flutes, lands (14) and a cutting tip (11). Said means comprise a cylindrical tooth (12) provided with a cutting edge (13) and a pin (17). The land (14) is provided with two holes (15,18) which receive the tooth and the pin.

Abstract: In accordance with the present invention, there is provided a cutting tool having a cutting tool insert which is automatically rotationally indexable. The cutting tool includes a shank and an indexable cutting tool insert rotatably connected to the shank. The insert includes a plurality of cutting edges and side surfaces therebetween. The cutting tool is also provided with an indexing device, lock pin, cam plate and eccentric cam pin. The indexing device comprises a sliding key and a pair of spring metal legs attached thereto for engaging a serrated portion of the lock pin to which the cutting tool insert is attached. The indexing device is effective for indexing the insert on the lock pin upon rotation of the cam pin which effects a lateral movement of the cam plate along the longitudinal axis of the shank whereby the cam plate engages the sliding key causing it to also move laterally to engage the indexing legs on the lock pin resulting in rotation of the lock pin and the cutting insert attached thereto.

Abstract: An indexable cutting tool wherein wear-resistant inserts are removably supported within a recess in a tool holder which has walls generally conforming to the adjacent surfaces of the insert. Interposed between the adjacent surfaces of the insert and the walls of the recess is a spacing shim with at least two portions which separate the insert from the walls of the recess. The portions which separate the inserts from the walls of the recess are connected by a weakened portion which may be scored or reduced in dimenson. The shim, as manufactured, is flat with the weakened portions connecting the portions adapted to separate the insert from the recess walls being provided to permit the shim to conform to a variety of insert configurations. The portions of the shim which separate the surfaces of the insert from the walls of the recess have a thickness which is equal to the amount of material removed from the surfaces of the insert in one or more resharpening operations.