Abstract: A cutting tool includes a cutting chip and a chip holder. The chip holder includes: a body part having a height dimension larger than a width dimension, the body part including a first attachment face that intersects with a cutting feed direction, and a second attachment face that intersects with the first attachment face; a chip support part whose base end portion is connected to the body part and in which the cutting chip is attached to the upper end portion in the height direction of a tip end portion of the chip support part such that the cutting chip projects to one side in the width direction of the chip support part; a reinforcement part provided along the height direction of the chip support part; and a chip receiving part that supports the cutting chip projecting from the chip support part.

Abstract: Aspects of the disclosure relate to a frame assembly, such as a door frame assembly for hanging a door. A frame assembly can include a longitudinal adjustment mechanism and a shim jack for connecting to the adjustment mechanism. The shim jack can include a longitudinal body with a first leg and a second leg extending from a base of the longitudinal body. The frame assembly can also include a frame with a jamb leg for adjustably connecting to the adjustment mechanism. The jamb leg can define a port for receiving the shim jack, and the adjustment mechanism may be operable to move the base of the shim jack with respect to the jamb leg to brace the frame assembly within an opening, e.g., by moving the first leg and the second leg against a framing member that defines the opening.

Abstract: An adjustable headgear mount device and system is presented. The mount system comprises an adjustable jaw that is adjustable by the user to accommodate a various range of male dovetail parts. A dovetail adapter and the adjustable jaw define a female receiver cavity configured to engage a male dovetail protrusion therein. A user moves the adjustable jaw into a desired position relative to the dovetail adapter and securedly fixes the adjustable jaw in the desired position with at least one attachment screw. In the desired position, a portion of the device engages the male protrusion. The adjustable jaw can be moved to a different position by the user if a different size male dovetail part is desired to be attached to the headgear.

Abstract: A cutting tool assembly includes a parting blade and a blade holder for holding same. The cutting tool assembly is configured for conveying pressurized coolant via the holder to a cutting portion of the parting blade. The blade holder includes a deceleration chamber configured for reducing the impact of the pressurized coolant against the parting blade.

Abstract: The present invention provides an apparatus and method for cutting a chamfer into the edge of a material while simultaneously making another cut in the material. The chamfer provides the cut material with reduced susceptibility to top surface edge swell.

Abstract: An indexable cutting insert has two cutting protrusions extending from opposite end surfaces towards a mid plane. Each cutting protrusion has a rear surface, an oppositely facing rake surface, a relief surface. A main cutting edge is formed at the intersection of the rake and relief surfaces, and extends between two main cutting edge ends. An edge projection is formed by a line connecting longitudinal projections of the main cutting edge ends of each main cutting edge. The edge projections of both of the main cutting edges form a non-zero first angle therebetween. The rake surfaces of the cutting protrusions are located on longitudinally opposite end surfaces of the cutting insert. Two clamping recesses and two abutment recesses serve as contact surfaces for clamping the cutting insert in an insert pocket of a cutting tool.

Abstract: A screw head wedge clamp assembly for a cutting tool includes a clamp screw having a screw head with a frustum-shaped portion, and a screw head wedge clamp having a body and a clamp head extending from the body. The clamp head has a frustum-shaped portion that is received in a mounting screw bore of a cutting insert. The wedge clamp contacts a radiused bottom wall of the clamp bore when the clamp screw is threaded into a threaded bore of an insert pocket, thereby causing the clamp head to exert a downward and rearward force against a mounting screw bore of the cutting insert to securely hold the cutting insert in the insert pocket. The screw head wedge clamp does not contact a top surface of the cutting insert, but only the frustum-shaped portion contacts the mounting screw bore of the cutting insert.

Abstract: A cutting tool (10) includes a toolholder (12) and a cutting insert (14) removably securable in the toolholder. The cutting insert (14) includes a lower clamping surface (18) with a V-shaped clamping surface (32, 34) on each side of a central portion (28). The toolholder includes a lower clamping surface (56) with an inverted V-shaped clamping surface (62, 64) on each side of the bottom surface (60) formed by a primary clamping surface (62a, 64a) and a secondary clamping surface (62b, 64b). The secondary clamping surfaces (32b, 34b) of the cutting insert (14) contacts the secondary clamping surfaces (62b, 64b) of the toolholder (12) when the cutting tool (10) is brought into a clamped position due to interference between the toolholder (12) and the cutting insert (14), thereby providing a minimum of four clamping surfaces when in the clamped position.

Abstract: An indexable cutting insert has mutually perpendicular longitudinal, lateral and vertical axes. The insert includes two opposite cutting portions and a clamping portion therebetween, arranged parallel to the longitudinal axis. Each cutting portion includes a rake surface and front and side relief flanks, and a cutting edge formed at an intersection of the rake surface and front relief flank. A second width of the clamping portion is greater than the first width of the cutting edges. The clamping portion has two resilient beams and a flexibility aperture opening out to side abutment surfaces of the clamping portion, allowing elastic deformation of the insert along the vertical axis. The cutting insert may further include two opposite stopper portions, each formed on a respective insert end surfaces, each stopper portion forming a step in the respective insert end surface. A cutting tool clamps one or more inserts at their clamping portions.

Abstract: Provided is an insert that has good positioning precision and sufficient rigidity. Said insert is rod-shaped and has: a shank part; cutting blades formed on both sides of the shank part; and raised surfaces that are positioned between the cutting blades and the shank part and bulge such that parts farther away from the cutting blades are progressively closer to the outer surface of the shank part. In a side view, the rake face of the cutting blade on one side and the raised surface on the other side are disposed in the same direction with respect to the axis of rotation of the shank part.

Abstract: A cutting tool for machining large workpieces having relatively a large cutting amount and a cutting insert configured to be used with the cutting tool. The cutting tool includes a cutting insert and a wedge for clamping the cutting insert. The cutting insert has a polygonal top surface, which comprises a recessed portion having a plurality of inclined abutment surfaces which are inclined toward the center of the top surface. The outline of said recessed portion is twisted at a predetermined angle with respect to the outline of the top surface. The wedge includes a projecting portion that contacts the inclined abutment surface and pushes the cutting insert so that two side surfaces of the cutting insert can be supported by a radial inner side surface and a lateral supporting surface of an insert seat.

Abstract: A multiple tool station block for a machine having a Y-axis, such as a CNC machine, is provided.

Abstract: In order to perform turning operations of the kind that has heretofore been performed by diamond-shaped inserts, an insert which is basically equilateral triangular in shape with multiple alternately usable cutting edges, of which all three corners are usable as cutting edges, without decreasing the positional accuracy of the cutting edge during cutting. At least one recess and a plurality of protrusions are formed on each side of the insert. The recess and protrusions formed on the insert are brought into engagement with a protrusion and recesses formed on a side wall of a seating groove formed in a holder. In this state, the insert is pressed against a bottom seating face and the side wall of the seating groove with a clamp as a means to stably restrain the insert. This prevents shifting of the cutting edge during cutting even if the direction of the cutting force changes.

Abstract: A tool-holding device for a lathe is provided including a lathe-attachment portion, with a base sized and shaped for placement on a lathe and attaching means for attaching the base to the lathe. The lathe-attachment portion also has a circular-perimeter, angled mounting apparatus integral with the base and having equal-sized wedge-shaped, double sloped clamping portions and a partly threaded central locking base-bore. Attached to the lathe-attachment portion is a frusto-conical multiple-tool tool-holder having a lower surface with an equal number of equal-sized wedge-shaped, double sloped clamping surfaces to mate with the clamping portions of the base. The upper surface of the tool-holder has insert pockets for attachment of tools. A central bore extends through the tool-holder for locking the tool-holding device to a lathe or other machine.

Abstract: A cutting tool has a cutting insert and a holder. The cutting insert has a cutting portion and an insert shank with a cylindrical portion and a non-cylindrical portion. The holder has a clamping portion which has a clamping sleeve and a cage located therein. The cage includes a load member housing with a load member. The cage has a major abutment wall adjacent to a minor abutment wall. The clamping sleeve has first and second inner sections defined by points P1 and P2. A point P3 divides the second inner section into first and second portions. The clamping sleeve is rotatable between a secured and a released position of the cutting tool. In the secured position, the non-cylindrical portion abuts the major abutment wall, the cylindrical portion abuts both the minor abutment wall and the load member, and the load member abuts the first portion.

Abstract: A drill holding tool includes a shaft and a drill-holding portion which has a recess defined axially in an outer periphery thereof so as to receive a flat center drill therein which has one end protrudes out from the distal end of the drill-holding portion. The recess is defined by two sidewalls and a bottom surface, and a threaded hole is defined through the bottom surface. Two semi-circular reception holes are defined in two insides of the two sidewalls and two positioning pieces are received in the reception holes. The center drill includes a positioning hole corresponding to the threaded hole in the recess and two semi-circular positioning notches in which the two positioning pieces are partially received. The center drill is a flat piece which saves material required and the positioning notches allow the center drill to be quickly and precisely positioned.

Abstract: A cutting tool for machining large workpieces having relatively a large cutting amount and a cutting insert configured to be used with the cutting tool. The cutting tool includes a cutting insert and a wedge for clamping the cutting insert. The cutting insert has a polygonal top surface, which comprises a recessed portion having a plurality of inclined abutment surfaces which are inclined toward the center of the top surface. The outline of said recessed portion is twisted at a predetermined angle with respect to the outline of the top surface. The wedge includes a projecting portion that contacts the inclined abutment surface and pushes the cutting insert so that two side surfaces of the cutting insert can be supported by a radial inner side surface and a lateral supporting surface of an insert seat.

Abstract: An insert clamping wedge for clamp-fixing a cutting insert, seated in an insert attachment seat formed in a cutter body, to a recessed portion formed in the insert attachment seat is provided, the insert clamping wedge including: a wedge body, wherein the insert clamping wedge is pressed into the cutter body, wherein the wedge body includes a clamp surface which comes into close contact with the cutting insert and a wedge surface of which a gap between itself and the clamp surface becomes smaller in a press-insertion direction of the wedge body, and wherein the section perpendicular to the press-insertion direction of the wedge body from the wedge surface to the clamp surface being formed in a bell shape.

Abstract: A cutting tool for grooving, parting and turning machining operations is capable of grooving to unlimited depths of cut. The cutting tool includes an indexable double-ended cutting insert having a downwardly extending insert clamping portion resiliently clamped in a self-retaining manner in an insert pocket so that chip formation is not hindered during such machining operations.

Abstract: An insert clamping wedge for clamp-fixing a cutting insert, seated in an insert attachment seat formed in a cutter body, to a recessed portion formed in the insert attachment seat is provided, the insert clamping wedge including: a wedge body, wherein the insert clamping wedge is pressed into the cutter body, wherein the wedge body includes a clamp surface which comes into close contact with the cutting insert and a wedge surface of which a gap between itself and the clamp surface becomes smaller in a press-insertion direction of the wedge body, and wherein the section perpendicular to the press-insertion direction of the wedge body from the wedge surface to the clamp surface being formed in a bell shape.

Abstract: A cutting tool has a cutting insert and a holder. The cutting insert has a cutting portion and an insert shank with a cylindrical portion and a non-cylindrical portion. The holder has a clamping portion which has a clamping sleeve and a cage located therein. The cage includes a load member housing with a load member. The cage has a major abutment wall connected to a minor abutment wall. The clamping sleeve has first and second inner sections defined by points P1 and P2. A point P3 divides the second inner section into first and second portions. The clamping sleeve is rotatable between a secured and a released position of the cutting tool. In the secured position, the non-cylindrical portion abuts the major abutment wall, the cylindrical portion abuts both the minor abutment wall and the load member, and the load member abuts the first portion.

Abstract: The cutting insert (10) has an upper face (1) having a pair of proud surfaces (13B, 13X), namely an entrainment stop surface (13B), for stopping the entrainment of the insert (10) by a slide (81) of the tool holder (101) into a mounting position, and, further to the front, a deflection surface (13X), for deflecting the path of chips away from a direction (13F) going from a rear edge of a disengagement surface (13D) to the entrainment stop surface (13B).

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

Abstract: The invention relates to a cutter support for fixing in a cutter head, comprising a shaft-like bar and a head with integrated cutters with minor cutters formed from a cutting surface and a free surface. According to the invention, a chamfer adjacent to the minor cutter is arranged on the free surface with a chamfer width decreasing outwardly to 0.

Abstract: The present invention relates to a coated cutting tool insert with elongated shape with a rake face and an opposite bottom surface with improved strength properties obtained by providing the inserts with a blasted bottom surface. The inserts are preferably used for parting and grooving operations.

Abstract: A planing head, cylindrical body for a planing head and a method of manufacture thereof are provided. The planing head includes a cylindrical body having an axis of rotation, an outer surface around the axis of rotation, and opposite first and second end faces. A plurality of blade assemblies is arranged along the outer surface. A plurality of grooves is provided in the outer surface and each groove is configured to receive a respective one of the plurality of blade assemblies. A hydraulic pressure system for supplying a hydraulic pressure to each of the blade assemblies is provided. The hydraulic pressure system includes a plurality of transverse channels for receiving a pressurised hydraulic fluid and a plurality of oblique channels hydraulically linking the plurality of transverse channels. Each transverse channel extends at least partially through the cylindrical body.

Abstract: A boring bar has a shank having a cutter support head at one end. A flow passage extends longitudinally through the shank to the cutter support head and intersects a transverse flow passage that is defined in part by a clamp screw passage of the head. A metal cutting insert is clamped to the cutter support head by a clamp that is secured by a clamp screw being threaded into the clamp screw passage. The clamp member defines at least one coolant fluid flow passage having a discharge opening or openings each located and oriented to direct a jet of coolant fluid onto the metal cutting insert immediately at the site of cutting engagement within the rotating workpiece. The clamp screw defines an internal passage that communicates with the transverse coolant fluid flow passage and conducts coolant fluid onto the metal cutting insert.

Abstract: A lathe tool assembly includes a pair of set screws that reduce vibration of a work piece that is being machined. A clamp set screw passes through a clamping assembly to a chip breaker that covers a cutting bit. The end of the clamp set screw bears against the chip breaker. A lateral motion inhibitor screw engages threads within a hole within a cutting bit holder and threads within a hole through the cutting bit.

Abstract: In an insert holder for indexable cutting inserts, a clamping device is located which includes an L-shaped member having first and second arms. The first arm is received in a blind hole in the cutting insert and the second arm is actuated by a pressure screw. A free end portion of the second arm has a yoke received in a recessed annular waist portion of the screw so that movement of the screw causes the L-shaped member to rotate and push the insert downwardly against a base surface and laterally against an upright support surface. The insert has a central elevated plateau on its top side to enable a depth of the blind hole to be maximized.

Abstract: A toolholder for a small-size insert having a shoulder for use with a machine tool for grooving, boring and turning has a substantially planar surface portion in an end portion which defines at least one insert-receiving recess extending inwardly into the body of the toolholder, and the end portion defining at least one abutment surface against which the shoulder of the insert may abut to readily orient and rapidly and readily secure the insert in the toolholder.

Abstract: A toolholder assembly for releasably holding a toolholder at a selected radial location within the toolholder assembly. The toolholder assembly includes a tool support member, an actuating bolt and an actuating centering nut. Rotation of the actuating bolt in a locking direction centers the actuating centering nut, actuating bolt and the toolholder with respect to the radial axis of a bore within the tool support member.

Abstract: A tool assembly includes a support body, a clamping device, and a tool holder clamped in a groove of the support body. A stopper block is disposed in the groove and abuts against the tool holder for positioning the tool holder along an axis. The stopper block is held in place by a wedge-type stopper clamp which applies a clamping force to the stopper block in a direction transversely of the axis. A wedge-type holder clamp is provided for applying a clamping force to the tool holder in a direction transversely of the axis. The stopper clamp is secured to the support body by a single fastening bolt, and the holder clamp is attached to the support body by a single fastening bolt. Each of the fastening bolts is provided with a part that forcefully pushes the respective clamp away from the support body in response to loosening of the fastening bolt. The arrangement is such that the tool holder can be inserted and removed without completely removing the holder clamp or its fastening bolt.

Abstract: A tool holder is held in a support body by a clamp which is wedged between the support body and the tool holder. The clamp is secured in the support body by a threaded fastener that extends through a through-hole formed in the clamp. The fastener carries a flange which pulls the clamp out of wedging relationship when the fastener is unscrewed. A spring disposed in the through-hole functions to keep the clamp pressed against the tool holder even after the clamp has been loosened, in order to keep the tool holder from falling out of the support body. A stopper is disposed behind the tool holder to locate the tool holder in a desired cutting position and to keep the tool holder pressed against an abutment surface of the support body.

Abstract: An insert retention screw comprises a head with a radius that is a sufficient size to fit within a mounting hole of a cutting insert and seat within a seating plane within the mounting hole that is generally perpendicular to the axis of the insert when the screw is at an angle in a range of about 0-15 degrees. The retention screw is provided for holding a cutting insert in the pocket of a tool body. The pocket is partially defined by a floor and a seating surface. A threaded hole is at an angle that is taken with reference to the pocket floor. The insert has a mounting hole passing therethrough. The retention screw passes through the mounting hole and threads into the threaded hole so as to draw the insert against the seating surface.

Abstract: With conventional small troublesome indexable inserts from high-pressure sintered materials having neither a screw-hole nor a cavity for attaching the insert to a toolholder, clamping the insert onto the holder has been complicated and the tightening force has been weak. The cause behind this is that with the hardness of high-pressure sintered material being high, surface machining is extremely difficult. A toolholder attachment cavity is provided in the rake face of an indexable insert composed of a high-pressure sintered material, by machining with a laser whose light output power is adjusted and whose light-harvesting is enhanced using a galvanometer mirror, while high-precision controlling the beaming position. This allows small-scale indexable insert of high-pressure sintered material to be mounted onto a holder simply and securely with a clamp, and makes for curtailed prep time, improved machining precision, and better mounting reliability.

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 helical knife assembly has a plurality of blade holders. Each blade holder has two opposite step flanges, a blind hole, and a threaded groove communicating with the blind hole. A positioning block has a slant recess and two apertures. An oblong blade has two positioning holes. A pressing block has a bevel and an inner threaded hole. A hollow double end bolt has a first outer thread and a second outer thread. The positioning block is inserted in the respective blade holder. The oblong blade is disposed on the positioning block. The first outer thread of the hollow double end bolt is inserted in the threaded grooves The second outer thread of the hollow double end bolt engages with the inner threaded hole of the pressing block.

Abstract: A fixing device for fixing a tool, preferably a turning tool, to a toolholder, includes a shank and at least one cutting part. The toolholder has an insertion opening for accommodating the tool shank. The fixing device includes a clamping element which is stored in such a way that it can partially rotate in the holder around an axis of rotation which is perpendicular to the axis of insertion of the insertion opening. The clamping element also includes a partially cylindrical surface section which is eccentric in relation to the axis of rotation. Furthermore, the shank surface has a partially cylindrical, open-edged recess perpendicular to the shank axis, into which recess the clamp element can be screwed by its partially cylindrical surface section when mounting the tool shank.

Abstract: An apparatus is disclosed for releasable holding a toolholder shank having a lockable surface and a releasable surface utilizing an actuating bolt. The actuating bolt is reciprocally movable along an axis to engage one side of the shank for locking the toolholder within the support member and an opposing side of the shank for releasing the toolholder from the tool support member.

Abstract: A tool for chip removing machining includes a holder and a cutting insert clamped within a pocket of the holder. The pocket has upper and lower sides, and the cutting insert comprises an upper surface and a lower surface. The upper side of the pocket and the upper surface of the cutting insert comprise first cooperating contact surfaces defining a first flank angle. The lower side of the pocket and the lower surface of the cutting insert comprise second cooperating contact surfaces which define a second flank angle. The first flank angle is larger than the second flank angle. The lower surface of the cutting insert and the lower side of the pocket form intermeshing projections and recesses which define the second contact surfaces.

Abstract: A metal-cutting tool comprises a holder, a clamp, and a metal-cutting insert. The holder includes a blade part which forms an upwardly facing seating surface extending in a front-to-rear direction. The holder includes a recess including a longitudinal axis extending in the front-to-rear direction at an angle relative to the seating surface, whereby an imaginary rearward extension of the seating surface converges toward the axis. The insert is mounted on the seating surface and the clamp has a rear portion which is slidable within the recess, whereby a front portion of the clamp pushes downwardly and rearwardly against a top surface of the insert. That top surface is shaped so that the front portion of the clamp is flexed upwardly relative to the rear portion when the rear portion is pushed rearwardly to the clamping position.

Abstract: A system for clamping a cutting insert on a grooving, threading, or milling tool wherein a top clamp member and a support plate are mounted on the tool's surface. The contacting surfaces of the tool, clamp member, and support plate are ground to a smooth finish. A cutting insert is formed with upper and lower V-shaped surfaces and is received in corresponding V-shaped recesses formed in edge portions of the top clamp member and the support plate. Bolts having left hand threads secure the top clamp member to the tool so as to clamp the insert between the top clamping member and the support plate.

Abstract: A holder for clamping an insert, such as an insert for the turning of grooves and for parting. The holder includes a slot for receiving the insert. A recess is formed in an upper surface of the slot, and a tensioning roller is rotatably mounted in the recess. The roller is rotatable between a position permitting insertion or removal of the insert, and a position clamping the insert in place.

Abstract: The invention concerns a cutter head, in particular a planing cutter head, whose blade carrier (1) has at least one mounting (5), facing radially outwards, for a blade (7). Fitted in each mounting (5) is a wedge grip (17) which can be moved relative to the blade carrier (1) and which presses the blade (7) against a stop (9) on the mounting (5) when moved with at least a component of motion radially outwards. Located between the blade (7) and the wedge grip (17) is a mounting strip (21) which can be moved relative to the wedge grip (17) and the stop (9) on the mounting (5) and which releases the blade (7) for removal radially outwards when the wedge grip (17) is displaced inwards.

Abstract: A side operated clamp for a resharpenable insert tool holder includes a clamping member movable into a converging recess on the tool holder body to clamp the tool insert against a shelf on the tool holder body. An actuator is movable transversely in a transverse slot extending across the tool holder. A threaded member is rotated to cause the actuator to move. The actuator has a projecting portion fitting into a dovetail keyway on the clamping member. The keyway is inclined to the transverse axis to cause clamping/unclamping movement when the actuator moves in the transverse slot.

Abstract: An improved system for mounting replaceable cutter blade insert for a thread milling tool including, and improved wedge mounting construction for readily mounting and aligning the insert in position on the cutting tool.

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 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.

Abstract: A toolholder for indexable cutting inserts includes a holder body forming an insert site. A pin projects upwardly at the insert site for entering a center hole of an insert. A clamping wedge is attached to the body by a screw. A rear end of the wedge engages an inclined supporting surface of the body, and a front end of the wedge engages the insert. By tightening the screw, the front end of the wedge pushes against the insert simultaneously downwardly and forwardly to press the insert against the pin and a floor of the insert site. The front end of the wedge includes a pair of forwardly projecting upper protrusions for engaging the top face of the insert, and a pair of forwardly projecting lower protrusions for engaging an edge face of the insert. The upper protrusions, and also the lower protrusions are disposed on opposite sides of an imaginary plane which contains the axis of the pin and the axis of the clamping screw.

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.