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: There is disclosed an insert clamped tool which has a tool holder including a recess formed at a forward end thereof and defining an insert-receiving seat. The tool holder has a pin-receiving hole formed therein so as to open to the insert-receiving seat and having a tapered portion. A positioning pin is releasably received in the hole of the tool holder. The positioning pin has an engaging portion formed at one end thereof and a tapered portion fitted in the tapered portion of the hole. A cutting insert having a mounting bore formed therethrough is received on the insert-receiving seat in such a manner that the engaging portion of the positioning pin is held in abutting engagement with the mounting bore of the insert. A clamp mechanism is arranged on the tool holder for pressing the insert against the insert-receiving seat and the engaging portion of the positioning pin.

Abstract: A forming tool for generating a predetermined configuration in a rotating metal workpiece includes a tool body having a shelf formed thereon, a shim on the shelf, a cutting insert having a cutting edge on the shim and a clamp assembly for clamping the insert and the shim on the tool body. The clamp assembly includes a clamp member having top and bottom sides, and a pair of screws for securing the clamp member on the tool body. The clamp member has a pair of substantially parallel elongated front and rear clamping pads formed on the bottom side thereof and it is mounted so that one of the clamping pads is supported on the tool body whereas the other clamping pad engages the insert to secure it on the tool body. The clamp member has an arcuate crown formed on the top side thereof which is oriented so that the apex thereof is substantially parallel to the clamping pads.

Abstract: In a lathe tool composed of a holder and a reversible cutting plate for cutting a groove or thread, the holder being formed to have a recess for accommodating the cutting plate, the recess having a bottom face and a side face, and the cutting plate having a longitudinal dimension, two longitudinal spaced frontal end faces each having a cutting edge, a narrow longitudinally extending edge extending between the frontal end faces and arranged to bear against the bottom face of the recess, a longitudinally extending broad side extending between the frontal end faces and transversely to the narrow edge and arranged to bear against the side face of the recess, and a fastening bore having an axis extending transversely to the broad side, the lathe tool further including a clamping device for holding the cutting plate in the recess with the narrow edge and broad side of the cutting plate bearing against the bottom face and side face, respectively, of the recess, wherein the clamping device includes a clamping element

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: The clamping mechanism and companion cutting insert disclosed are designed for use in a milling cutter intended to be ganged with other like cutters on a common rotational axis for the simultaneous milling of multiple slots or grooves. The axially movable clamp for the on-edge inserts employed in the cutter is operated indirectly by an adjusting screw accessible radially from the outside of the ganged cutter bodies without requiring disassembly of the individual cutters to index or replace the cutting inserts. In each of several clamping mechanisms disclosed, the ultimate clamping element or detent takes the form of an arm which is rocked into engagement with the insert at the site of a blind depression in the face of the insert, being drawn in the axial direction by inward adjustment of a radially accessible adjusting screw, and rockable in the reverse direction by a return spring to release the insert as the adjusting screw is backed off.

Abstract: A toolholder and insert cartridge are disclosed in which an insert cartridge holds multiple, similarly-shaped inserts in a face-to-face relation in a storage chamber. The insert cartridge has means thereon for dispensing individual inserts one at a time and can be adapted to be held and moved by a robotic arm or a reciprocal moving holder. A toolholder having an insert pocket with a movable insert seat therein is utilized with the insert cartridge. A reciprocably movable drawbar moves the insert seat in the toolholder pocket back and forth so as to clamp and unclamp a cutting insert. When it is signaled to change the insert, the drawbar moves the insert seat out of the insert pocket, thereby unclamping the insert. The insert is then removed from the insert seat and the insert storage cartridge is positioned in proper alignment with the toolholder. The cartridge and toolholder are then engaged so that the insert seat engages the dispensing means on the cartridge unit.

Abstract: A chip cutting tool comprising a tool body and a resiliently yielding element for clamping a cutting insert to the tool body. The cutting insert is adapted to be clamped by making use of solely a portion of the available yielding movement and adapted to be loosened by further resilient yielding movement of the element at the same time as the cutting insert is clamped butt on butt to the tool body.

Abstract: The invention relates to a device for clamping cutting inserts in recesses of cutter supports comprising a cam rotatably mounted in the cutter support and a clamping member provided on the cutter support. The clamping member is adapted to be pressed by the cam against the cutting insert and is designed as a pin secured in the cutter support in a cantilever manner. The free end of the pin is adapted to be displaced by the cam towards the cutting insert. In order to improve the run-off of cuttings, a clamping plate engaging the cutting insert is provided on the free end of the pin.

Abstract: A cutting tool comprises a bit-holder fed at a prescribed feed amount f per rotation of the workpiece, and a throw-away tip which is formed of superhard metal, which has an outer peripheral surface of prescribed shape, an inner peripheral surface provided concentrically with the outer peripheral surface, similar to the prescribed shape of the outer peripheral surface and defining a hollow part and a predetermined thickness t and which is detachably mounted to the bit-holder. A distance .omega. between the inner peripheral surface of the throw-away tip and the outer peripheral surface thereof is defined within a range satisfying the following formula represented by; f.sub.max .ltoreq..omega..ltoreq.t.

Abstract: Pin lock insert holder constructed as an essentially straight lever having longitudinally spaced hold down and fulcrum projections on opposite sides and a lever actuating recess engaged by an angularly related screw. An additional shim retention projection and snap ring accommodate loosening for insert replacement with secure retention of pin and shim against removal or dislocation. Modifications without shim retention accommodate small inserts with shorter lock pins.

Abstract: A tool holder, and a locking pin for use therewith, of the type having a recess into which a cutting insert is removeably secured by passing the locking pin through a bore in the insert and into a bore in the tool holder.

Abstract: A cutting tool comprises a bit-holder fed at a prescribed feed amount f per rotation of the workpiece, and a throw-away tip which is formed of superhard metal, which has an outer peripheral surface of prescribed shape, an inner peripheral surface provided concentrically with the outer peripheral surface, similar to the prescribed shape of the outer peripheral surface and defining a hollow part and a predetermined thickness t and which is detachably mounted to the bit-holder. A distance .omega. between the inner peripheral surface of the throw-away tip and the outer peripheral surface thereof is defined within a range satisfying the following formula represented by; f.sub.max .ltoreq..omega..ltoreq.t.

Abstract: A mount for the mounting of milling tool bits in a recess of a tool bit holder. A screw extends through a bore of the bit and screws into a threaded hole of the holder. A longitudinally slit sleeve is arranged between the screw and the inner wall of the bore of the bit and encompasses the screw. The end of the sleeve opposite the head of the screw rests upon a shoulder of the holder in such manner that when the screw is tightened the screw forces the sleeve into rotation about a rotary axis defined by the point(s) of contact of the sleeve with the shoulder. This rotary axis extends transverse to the screw axis such that an upper end of the sleeve is forced into engagement with the inner wall of the bit bore to secure the bit radially and axially. Replacement or indexing of the bit is permitted in response to minimal unscrewing of the screw, e.g., 90.degree. to 180.degree..

Abstract: The cutting tool includes a cutting insert retention pin with an intermediate radial flange adapted to engage a crescent-shaped bottom wall or shoulder in a specially-configured pin-receiving cavity in the toolholder insert pocket and thereby cause the retention pin to tilt in an insert locking direction in the cavity. The pin-receiving cavity is formed by first and second intersecting circular counterbores and a tapped hole with the first counterbore and tapped hole being coaxial and the second counterbore being offset toward an abutment surface in the toolholder pocket and deeper than the first counterbore.

Abstract: A system for exchanging a cutting tool of a tool holder which includes a tool having a tool head which carries a cutting element and is provided with a bore. The tool head is removably connected to the tool holder. A spreading cylinder is provided for engaging the bore of the tool head to remove the tool head from the tool holder. The system further includes a magazine having a plurality of locations for receiving tool heads equipped with cutting tools.

Abstract: There is disclosed an improved cutting tool having a body provided with a threaded borehole, a clamping bolt and a recess, and which is provided with a supporting surface and at least one lateral supporting surface for supporting an indexable cutting insert. The insert is provided with a center hole for receiving the clamping bolt which has a rotationally symmetrical shaped portion for engaging the center hole thereof. The upper end of the clamping bolt has the form approximately of a clipped ball and the lower end is screwable into the threaded borehole of the tool body with the center portion thereof supported on the tool body; the borehole of the tool body being provided with two coaxial upper and lower cylindrical sections of different diameters extending perpendicular to the surface supporting the cutting insert.

Abstract: A toolholder for releasably holding an indexable cutting insert is described. The insert is locked onto an insert receiving pocket on the toolholder by a locking pin whose head clamps against an upwardly facing wall in a tapered central aperture through the insert. The pin is threadedly engaged to the toolholder and is configured so as to allow itself to tilt outwardly, after the insert is unclamped, allowing the insert to be removed from the pin and the insert pocket.

Abstract: A holder or nest for pin-type replaceable cutting inserts has a back face and a front face parallel to the back face for supporting a pin-type replaceable cutting insert of the type having a circular aperture centrally disposed therein. A pin extends perpendicularly to the front face of the holder, on which pin the cutting insert is received. The holder comprises an extension having a face coplanar with the back face of the holder itself. The extension further comprises a threaded aperture to receive a screw which serves to clamp the holder and the cutting insert into a recess in the cutter body.

Abstract: A toolholder for holding a cutting insert having an axial hole is disclosed having a pocket therein for seating of the insert and a hole in the toolholder extending transversely through the bottom of the pocket. A pin having a head for engaging the insert and a pivotal shoe member cooperate in the hole such that, as the rotatable pin is tightened, the shoe member forces the head of the pin to tilt toward a side wall of the pocket and clamp the insert to the toolholder.

Abstract: An improved tool holder of the type having an insert receiving pocket and using tiltable pin to clamp an insert in the pocket. The pin is located in a bore through the bottom of the pocket of the tool holder and is tiltable therein so that one end of the pin engages a center hole of an insert and clamps it in the pocket. A recess communicates with the bore near the lower end of the pin when the pin is in the bore and spherical elements such as balls are disposed in said recess. Means for moving said spherical elements are provided so that the pin is tilted into clamping position on the insert. A top clamp is provided that cooperates with the pin element in clamping said insert.

Abstract: A tool holder having a cut-out portion in its forward end which is to defined as a generally flat surface for supporting the bottom surface of a tool bit over the entire area of the flat surface and an upstanding side wall for engaging a substantial portion of the side surface of the tool bit. A retaining pin is rockingly mounted on the tool holder with the upper end projecting out of the flat surface and being received of a hole of the tool bit. The lower end portion of the retaining pin is urged laterally with respect to the longitudinal axis of the pin by a tightening screw whereby the tool bit is urged against the upstanding side wall.

Abstract: A disposable insert is retained in a toolholder recess by a downwardly biased pin element having a head part which abuts laterally against the insert hole wall and against two points of a projection extending into the insert hole.

Abstract: A toolholder for holding a cutting insert having an axial hole is disclosed having a pocket therein for seating of the insert and a hole in the toolholder extending transversely through the bottom of the pocket. A pin having a head for engaging the insert and a pivotal shoe member cooperate in the hole such that, as the rotatable pin is tightened, the shoe member forces the head of the pin to tilt toward a side wall of the pocket and clamp the insert to the toolholder.