Abstract: A cutting insert includes a body that forms top and bottom surfaces, and a center hole intersecting at least the top surface (e.g., a through-hole). A portion of the top surface which extends around the center hole includes an array of projections radiating laterally outwardly around the center hole. A distal end of each projection disposed farthest from the center hole defines a tip of the projection. The projections form at least six tips spaced circumferentially apart. Each tip has a planar top face. A clamp has flat contact surfaces which press downwardly against the planar top faces of respective projections simultaneously as the clamp pulls the insert against an upstanding support surface.

Abstract: A tool for chip removing machining comprising a tool head, which is provided with insert seats for the receipt of replaceable cutting inserts as well as a fastening part intended to be received in a machine tool. The tool has at least two chip pockets, in each one of which two replaceable cutting inserts are arranged, the two cutting inserts arranged in each chip pocket being intended for different types of machining and having the active surfaces thereof opposite each other. Furthermore, the two cutting inserts arranged in a common chip pocket have their axially furthermost portions located at different levels in the axial direction of the tool. The two cutting inserts for turning are located in different chip pockets and have their axially furthermost portions thereof located at different levels in the axial direction.

Abstract: A cutting insert includes a body that forms top and bottom surfaces, and a center hole intersecting at least the top surface (e.g., a through-hole). A portion of the top surface which extends around the center hole includes an array of projections radiating laterally outwardly around the center hole. A distal end of each projection disposed farthest from the center hole defines a tip of the projection. The projections form at least six tips spaced circumferentially apart. Each tip has a planar top face. A clamp has flat contact surfaces which press downwardly against the planar top faces of respective projections simultaneously as the clamp pulls the insert against an upstanding support surface.

Abstract: A tool for chip removing machining includes an insert holder and a cutting insert attached thereto. The holder includes a longitudinal center axis and terminates in a support surface at a front end of the holder. The support surface defines a seat to which the insert is removably attached. The support surface forms a 45-degree angle with the center axis. The cutting insert includes a contact surface for mounting the insert to the seat, and a plurality of fingers projecting generally radially with respect to the center axis. Each finger includes a cutting edge and an associated chip surface.

Abstract: A tool for chip removing machining includes a holder and a tool head removably attached to the holder by screws. The head, which carries at least one cutting insert, has a serrated surface mated with a serrated surface of the holder. Those serrated surfaces define an interface between the holder and the head which is oriented at a 45 degree angle with respect to a basal plane extending through the holder and containing a longitudinal axis thereof.

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: A cutting insert is clamped in a pocket of a holder by a top clamp assembly which includes a clamp arm screwed to the holder, and a clamp plate interposed between the insert and a front part of the clamp arm. The clamp plate is formed of a harder and more wear-resistant material than the clamp arm and transmits clamping forces from the clamp arm to the cutting insert. The hard clamp plate shields the clamp arm from being impacted by chips generated during a machining operation, thereby minimizing wearing of the clamp arm.

Abstract: A driven tool includes a driven part which is rotatably driven by a drive part. The driven part and the drive part are coaxially arranged one inside of the other. The drive part and the driven part are conical as viewed in a longitudinal section plane containing the axis. The driven part includes driven teeth projecting generally radially with respect to the axis and received in respective radially-open recesses formed in the drive part. Each of the driven teeth makes contact with a wall of the respective recess at first and second contact places which are respectively situated on opposite sides of a generally radial line of symmetry of the driven tooth. The contact places are operable to transmit a drive force from the drive part to the driven part in respective directions of rotation. A driving angle in the range of −5° to +45° is formed at each contact place.

Abstract: The invention relates to a ceramic cutting insert for cutting tools of the type which include a clamp with a nose intended to grip into a recess (5) in the cutting insert in order to keep the cutting insert firmly in place in an insert seat in a tool holder. The recess (5) has a rotationally symmetrical shape and comprises an inner cavity (18) which is delimited by a cylindrical or slightly conical wall surface (19) said cavity extends from the far end of the inner cavity and expands outwards by ever increasing its diameter in the direction from the inner cavity to the entrance opening in the said upper or lower sides.

Abstract: A metal cutting tool includes a stationary tool holder and a mounting body therefor. The tool holder includes a first coupling part which is restrained by a second coupling part on the mounting body. The coupling parts are coaxially arranged one inside of the other. The coupling pars are conical as viewed in a longitudinal section plane containing the axis. The first coupling part includes teeth projecting generally radially with respect to the axis and received in respective radially-open recesses formed in the second coupling part. Each of the teeth makes contact with a wall of the respective recess at first and second contact places which are respectively situated on opposite sides of a generally radial line of symmetry of the tooth. The contact places are operable to transmit a restraining force from the second coupling part to the second coupling in respective directions. A restraining angle in the range of −5° to +45° is formed at each contact place.

Abstract: A tool coupling includes a holder and an adapter attachably interconnected by a serrated coupling. A fastening screw extends in both the adapter and the holder and is arranged coaxially with a center axis defined by the adapter and the holder. The screw is threadedly connected with the holder and includes a cooling passage therein for conducting cooling medium from the holder to the adapter for cooling a cutting insert carried by the holder.

Abstract: A tool for chip removing machining includes an insert holder and a cutting insert attached thereto. The holder includes a longitudinal center axis and terminates in a support surface at a front end of the holder. The support surface defines a seat to which the insert is removably attached. The support surface forms a 45-degree angle with the center axis. The cutting insert includes a contact surface for mounting the insert to the seat, and a plurality of fingers projecting generally radially with respect to the center axis. Each finger includes a cutting edge and an associated chip surface.

Abstract: A cutting insert is clamped in a pocket of a holder by a top clamp assembly which includes a clamp arm screwed to the holder, and a clamp plate interposed between the insert and a front part of the clamp arm. The clamp plate is formed of a harder and more wear-resistant material than the clamp arm and transmits clamping forces from the clamp arm to the cutting insert. The hard clamp plate shields the clamp arm from being impacted by chips generated during a machining operation, thereby minimizing wearing of the clamp arm.

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: A metal cutting tool includes a stationary tool holder and a mounting body therefor. The tool holder includes a first coupling part which is restrained by a second coupling part on the mounting body. The coupling parts are coaxially arranged one inside of the other. The coupling pars are conical as viewed in a longitudinal section plane containing the axis. The first coupling part includes teeth projecting generally radially with respect to the axis and received in respective radially-open recesses formed in the second coupling part. Each of the teeth makes contact with a wall of the respective recess at first and second contact places which are respectively situated on opposite sides of a generally radial line of symmetry of the tooth. The contact places are operable to transmit a restraining force from the second coupling part to the second coupling in respective directions. A restraining angle in the range of −5° to +45° is formed at each contact place.

Abstract: A driven tool includes a driven part which is rotatably driven by a drive part. The driven part and the drive part are coaxially arranged one inside of the other. The drive part and the driven part are conical as viewed in a longitudinal section plane containing the axis. The driven part includes driven teeth projecting generally radially with respect to the axis and received in respective radially-open recesses formed in the drive part. Each of the driven teeth makes contact with a wall of the respective recess at first and second contact places which are respectively situated on opposite sides of a generally radial line of symmetry of the driven tooth. The contact places are operable to transmit a drive force from the drive part to the driven part in respective directions of rotation. A driving angle in the range of −5° to +45° is formed at each contact place.

Abstract: A tool holder has a insert-support surface and a wedge-support surface. A pin projects upwardly from the insert-support surface and enters a through-hole of a cutting insert that is seated on the insert-support surface. The wedge-support surface includes a front portion disposed adjacent the insert-support surface and a rear portion extending upwardly from the front portion at an inclination. A wedge contacts both of the front and rear portions and is secured by a fastening screw which passes through the wedge and enters the front portion. The wedge includes a front insert-engaging bulge, and a lower heel which contacts the front portion and defines a pivot axis which is located closer to the pin than is the bulge. Upon tightening of the screw, the wedge is (a) pushed toward the insert by the rear portion of the wedge-support surface to push the insert against the pin, and (b) caused to pivot about the pivot axis in a direction producing a slight downward movement of the bulge.