Abstract: A turning tool includes a holder and an cutting insert clamped to the holder. The insert and the holder include respective support surfaces pressed against one another. Each of those support surfaces includes first and second sets of ridges oriented substantially perpendicular to one another. The ridges on the insert's support surface engage respective ridges on the holder's support surface to prevent movement of the insert relative to the holder in two directions oriented perpendicularly to one another. At least one of the first and second support surfaces has its first and second sets of ridges arranged in respective first and second regions of that support surface. The other support surface could have its sets of ridges arranged in a similar fashion, or its sets of ridges could occupy the same region of the support surface to form a waffle pattern. The insert and the holder include respective holes which are aligned to receive a clamping element.

Abstract: A tool holder for mounting a cutting insert for chip removing machining includes a head on which is disposed an insert-receiving seat having an insert-support surface. A plate-shaped member is detachably mounted on the head and includes first and second fingers. The fingers include respective first and second side surfaces forming a recess therebetween. The side surfaces are arranged in upstanding relationship with the insert-support surface to form therewith the insert-receiving seat. The first finger includes a through-slot and is flexible, wherein the first side surface is elastically displaceable relative to the second side surface. An intermediate portion of each of the side surfaces includes a recess wherein each of the side surfaces defines a plurality of spaced-apart contact areas. The plate-shaped member and the head include serrations which are in meshing relationship, except at locations which permit the first finger to be elastically deformed relative to the second finger, by an adjusting screw.

Abstract: In addition to having a stop member in the form of a hollow cylinder which is slotted and can be spread by means of an adjustment screw, an adjustable stop for a cutter adjustably arranged in a main casting or body of a tool is also provided with a sleeve member which can be inserted into a longitudinal bore of the stop member. The sleeve member has inside threads which can be brought into engagement with the adjustment screw. This results in an improvement of the load carrying capacity of the threaded connection. Since the sleeve member can move in the adjustment direction, the bending load on the adjustment screw is reduced.

Abstract: A milling tool for machining workpieces of wood, derived timber products, plastic material etc., has a support with a receiving portion and a cutting portion. The cutting portion has cutouts with a support surface for receiving at least two exchangeable cutting tips that are connected to the cutouts by at least one screw, respectively. The cutting portion has bores extending from the support surface of the cutouts into the cutting portion. the bores have a threaded portion and a threadless portion. The screws are threaded into the threaded portion of the bores for pressing the cutting tips against the support surface. The cutting tips have receiving openings. The screws have a guide shaft penetrating the receiving opening and extending into the threadless portion that has a tight clearance fit relative to the guide shaft. The screws have a head and the head has a clamping surface extending parallel to the support surface. The guide shaft is arranged adjacent to the clamping surface.

Abstract: A cutting insert has an upper surface bounded by a cutting edge, a base, and a peripheral flank surface. The shape of the peripheral flank surface varies along the height of the cutting insert. Near the top of the peripheral flank surface, it conforms to the round or polygonal geometry of the cutting edge so as to provide support for the cutting edge. Lower down the cutting insert, the peripheral flank surface is shaped to provide transverse bearing surfaces which have considerably lower pressure angles, i.e., resistance to turning moments, than would be provided by the inherent geometry of the cutting edge. Preferably, these transverse bearing surfaces are formed by recessed features such as channels, and most preferably, as chevron-type channels. This latter possibility leads to a lower cross-sectional geometry which approximates to an n-pointed star.

Abstract: A device for the clamping of cutting inserts for cutting metal machining. The device includes a mainly straight locking screw, which is threaded through a through center hole in the cutting insert and is threaded firmly into a threaded boring in a cutting insert seat intended for accommodating the cutting insert. The cutting insert seat is provided in a cutting insert holder body, such as a turning bar, a milling cutter body or a drilling tool. The head of the locking screw is chamfered in at least two places to enable the cutting insert to be stepped over the locking screw head when the screw is screwed upwards a predetermined number of revolutions. Thus, the present invention eliminates the need for the screw having to be detached from the threaded boring in order to remove the cutting insert.

Abstract: A boring cutter assembly with fine adjustment is provided for finely adjusting the diameter of the bore to be formed and for compensating wear of the blade. The boring cutter assembly includes a cutter shaft including a distal end with a cutter seat for receiving a blade. A countersink is defined adjacent to the cutter seat. A bottom wall that defines the countersink includes a screw hole. The countersink and the screw hole together receive an adjusting screw. A first scale is provided on the distal end of the cutter seat and around the countersink. A second scale is provided on the top face of the fine adjusting screw and corresponds to the first scale. A side of the blade that defines a portion of the cutting clearance angle of the blade cooperates with the pitch of the fine adjusting screw, such that the blade is laterally moved when the fine adjusting screw moves vertically as a result of rotation thereof, thereby adjusting the diameter of the bore to be formed.

Abstract: A modular cutting tool assembly inludes a tool holder having at least one insert receiving pocket, and at least two cutting inserts interchangeably receivable within the pocket. The pocket has a first lateral support surface forming an angle .theta. with a second lateral support surface as measured in a plane perpendicular to the pocket axis. Each of the cutting inserts has a peripheral flank surface configured to provide a number of abutment features appropriately angled for positioning in abutment with the lateral support surfaces. The peripheral flank surface of one cutting insert is further configured to provide at least two cutting points having a first nose angle, and the peripheral flank surface of the other cutting insert is further configured to provide at least two cutting points having a second nose angle different from the first nose angle.

Abstract: A cutting insert for the chipforming machining of metals is mounted on a holder. A holding surface of the holder includes at least one rib extending in the longitudinal direction of the holder. The bottom surface of the insert includes at least one groove which receives the rib of the holder. The flanks of the rib and groove are inclined, whereby the insert is supported by those flanks. The bottom side of the insert further includes a transverse surfaces extending perpendicular to the groove and which are adapted to engage corresponding transverse surfaces of the holding surface, in order to resist longitudinal forces applied to the cutting insert.

Abstract: A tool includes a cutting head and a holder, wherein the cutting head and the holder form two cooperating surfaces that are pressed together. The surfaces possess rows of alternating parallel grooves and ridges for locking the surfaces to each other. Each of the surfaces has two rows of grooves, one row oriented 90.degree. relative to the other row. On one of the surfaces, some of the grooves of one row are in non-intersecting relationship with the grooves of the other row. On the other surface, the rows extend completely across one another, whereby the rows together form a waffle-like pattern. The cooperating surfaces allow at least four separate relative positions between the cutting head and holder.

Abstract: A boring tool includes a concave groove formed on the outer peripheral surface of a tool body on the side opposite from a cutting blade with respect to an axis of the tool body. The concave, groove 10 is formed so as to extend from a position x, which is separated rearwardly from a front end face of a head portion, toward the rear side, and to be open downward from above a rake face. Furthermore, a sub-groove is formed between the concave groove and a chip pocket. Accordingly, the natural frequency is increased by reducing the weight of the head portion while limiting rigidity reduction, thereby restricting chattering.

Abstract: An indexible cutting insert for chip-breaking metal machining comprises an upper surface or chip surface, a lower bottom surface which is substantially plane parallel to the upper surface, and at least a side surface extending between the surfaces, which forms an acute angle with the upper surface and an obtuse angle with the bottom surface. The side surface has at least two bulging portions which are intended to function as support surfaces against the support surfaces in an insert seat.

Abstract: The back surface of a tool insert (12) is provided with a series of axially extending serrations (25) that form a contact surface to mate with similar serrations formed on the mounting surface (23) of a tool mount (13). The tops of the serrations are truncated so that the tapered walls of each serration are in full engagement with the adjacent walls of the mating serration. A threaded fastener (15) secures the insert (12) to the tool mount (13). A projection (18a) on the mounting surface resists axial movement of the insert. The serrations (25) extend toward the base of the insert to prevent lateral displacement resulting from circumferentially applied forces acting on the curved cutting surfaces (12a, 12b, 12c) of the insert. The centering and restraining action of the serrations maintain the inserts in proper alignment even after the mounting surface serrations of the tool mount begin to exhibit wear.

Abstract: A cutting tool assembly for turning a stepped square shoulder on a workpiece of a limited maximum depth of cut, the cutting tool assembly including a toolholder for replaceably receiving a substantially square cutting insert with concave side edges and acute insert cutting corners.

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: A tool for cutting metal machining comprises one or several cutting insert seats (1), each one for an indexable cutting insert, each insert seat comprising a bottom support surface (10) and at least two side surfaces, which form a right angle with each other. One of these side surfaces comprises two side surfaces (12, 16), which are located at different distances from the bottom support surface (10), one of these being intended as a support surface for square cutting inserts and the other as a support surface for specially shaped hexagonal inserts. In this way, one and the same insert seat can accommodate either a square or a hexagonal cutting insert, which considerably improves cutting economy.

Abstract: A metal cutting insert includes a cemented carbide body having a cutting edge and a hole therein for receiving a fastening screw. The hole includes female screw threads for being screw threaded to the fastening screw. The insert is made by a process involving injection molding and sintering steps.

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 cutting insert for the chipforming machining of metals is mounted on a holder. A holding surface of the holder includes at least one rib extending in the longitudinal direction of the holder. The bottom surface of the insert includes at least one groove which receives the rib of the holder. The flanks of the rib and groove are inclined, whereby the insert is supported by those flanks. The bottom side of the insert further includes a transverse surfaces extending perpendicular to the groove and which are adapted to engage corresponding transverse surfaces of the holding surface, in order to resist longitudinal forces applied to the cutting insert.

Abstract: A cutting insert is mounted by a rib-and-groove connection on a holder. The grooves are formed in a bottom surface of the insert, and the ribs extend from a holding surface of the holder. The ribs and grooves include mutually convergent sides configured such that a gap is formed between the holding surface and bottom surface, and between a top of each rib and a bottom of a respective groove.

Abstract: A debarking knife includes a plate having at least one sharp debarking edge delimited by a leading face and a trailing face. The leading face is reinforced by an anti-abrasion hard surface coating having better anti-abrasion qualities than the substrate forming the plate. The anti-abrasion hard surface coating is preferably a mixture of grains of fused tungsten carbide bound by an Ni/Cr/B/Si alloy, the whole being brazed to the substrate using a laser beam.

Abstract: The invention concerns a barking tool for barking machines of the type having a plurality of swinging arms, each being at an inner end pivotally mounted on an annular rotator which is rotatable about an axis of rotation, and each having at a free outer end a processing edge. The processing edge is defined between a front and a top surface, which is adapted, during barking, to make an acute angle with the circumferential surface of the log. The barking tool further has a bead, which is located on the top surface in an area adjacent to the end of the processing edge furthest down in the feeding direction.

Abstract: A cutting tool assembly comprising a tool holder formed with an insert retaining pocket having a pocket base wall and in which is releasably mounted a cutting insert and a shim. The cutting insert is of a substantially prismatic shape having an upper surface, a lower surface and side relief flank surfaces and at least one cutting corner defined therebetween and presenting at least one cutting edge formed by the intersection of the upper surface and a corresponding number of the side relief surfaces adjacent thereto.

Abstract: A boring bar includes an insert pocket formed on the back side of a relief in the working end of the bar, for the removable installation of a cutting insert therein. The insert pocket may be formed to provide a positive rake angle for the insert installed therein, relative to the axis of the bar, and further may include a positive angle relative to the radius of the bar as well. The force imparted to the insert as the bar is forced against the workpiece, tends to force the insert upwardly and inwardly into the pocket of the bar, thus assisting in holding and securing the insert to the bar. The bar is also thicker at the upper portion of the insert pocket than at the lower portion of the pocket, thus providing additional strength and stiffness to the bar in this critical area to reduce the possibility of chatter and breakage of the bar. Either the tool moves and the workpiece is stationary, or the workpiece moves and the tool is stationary.

Abstract: A machining tool beveling the edges of workpieces such as sheet metal is movable relative to the workpiece in the feed direction along the edge of the workpiece and in an action direction perpendicular to the feed direction. It has at least two adjacent cutting edges extending in the feed direction, one of which is the leading edge and the other of which is the trailing edge which is offset from the leading edge. The trailing cutting edge will effect a further cut in the workpiece as the tool is moved along the edge of the workpiece and reciprocated against its edge portion.

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: 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 shim for use in a metal cutting tool comprised of a tool holder and a double sided cutting insert. The insert has rake surfaces formed in the corners of upper and lower surfaces of the insert with a recess formed in the corners. The shim is used to retain the insert in the tool holder. The shim has a shape and lateral dimensions substantially corresponding to the insert. The shim has at least one projection which mates with the recess. When the insert and shim are clamped in the tool holder, the projection adjacent an operative pair of insert cutting edges bears against the walls of the associated recess, effectively supporting the insert in this region. This results in the inoperative lower cutting edges being spaced from the shim.

Abstract: A dove-tail end mill having a cutter shank with a milling head supporting a plurality of replaceable standard 60.degree. triangular cutter inserts. The cutter inserts are designed and oriented with respect to the cutter head to position cutter edges for generating the inclined undercut surface of a dove-tail slot. Simultaneously, the cutter configuration is designed to establish a clearance angle between the lower cutting edge of each of the cutters and the planar surface being generated by the cutter inserts. The milling head defines a plurality of cutter stations each having planar support surfaces for stabilization of the respective cutter inserts and cutter orientation shoulders for accurate positioning of each of the cutter inserts with respect to the cutting head. The cutting head supports each of the cutter inserts to define a cutting rake of about plus 15.degree. and axial rake of about plus 10.degree. and a radial rake of about minus 14.degree..

Abstract: A multiple spindle screw machine box tool insert holder, the box tool insert holder comprising: a shank member having a generally elongated parallel sided configuration including top and bottom elongated surfaces, and left and right elongated surfaces, the shank member also having from and rear opposing end surfaces; and an insert receiving pocket. The insert receiving pocket is positioned on the front end surface of the shank member. The insert receiving pocket is comprised of a bottom wall and three side walls for seating an insert therein. The insert has a central hole located therein. The side walls have a height less than a height of the insert. The insert receiving pocket has a threaded hole formed downwardly through the bottom wall.

Abstract: Relatively thick-walled (or solid) tubular members may be cut by cutting tools which include a frame assembly which is concentrically positionable (either interiorly or exteriorly) relative to the tubular member to be cut. A radial cutting assembly defines a cutting plane and is connected to the frame so as to be rotationally movable about the longitudinal axis of the tubular member to be cut. The radial cutting assembly carries a bit subassembly (preferably a pair of generally radially opposed cutting assemblies) for cutting the tubular member. A drive/indexing assembly is provided so as to rotate the rotatable ring (and thereby cause the radial cutting assembly to move orbitally about said tubular member), and index the bit radially toward the tubular member in response to rotational movement of the radial cutting assembly.

Abstract: A portable cutting tool has an annular frame for surrounding the pipe. A rotatable ring on the frame carries a radially fed cutter which includes a bit subassembly for cutting the tubular member. The bit subassembly is indexed in response to orbital movement of the cutter. The bit subassembly includes a bit planar support block which has a dimension (as measured parallel to the longitudinal axis of the tubular member being cut) which is less than that of the bit which it carries. In such a manner, a channel passageway may be formed between the bit support block and the tubular member being cut as the bit penetrates into the tubular member during the cutting operation such that lubricating/flushing fluid may be directed to the bit.

Abstract: A machining apparatus is described, of the type that includes a metal cutting insert which is held by an insert holder apparatus, wherein the insert can be installed in a plurality of different positions to use different ones of the cutting edges, which facilitates mounting of the insert. The holder apparatus includes a holder bar (16, FIG. 1) and a pocket member (14) that mounts on the bar and that holds an insert (12) with cutting edges (22). The pocket member has a first precision flat surface (90) that mounts facewise against a flat surface on the bar, and the pocket member has a second precision flat surface (92) that mounts facewise against a surface on the insert. The first and second flat surfaces on the pocket member can be parallel, or can be angled slightly from each other, to control orientation of the insert. The insert has a mount portion (32, FIG.

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 blade is of a type having its teeth so spaced and arranged that each tooth is spaced 90.degree. from another tooth. The body of the tool has first and second parallel clamping surfaces through which a straight slot opens. A first or front 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. The slot is disposed and dimensioned so that, in use, it is normal to the axis of the work piece with one end above and the other end below that axis.

Abstract: A cutting tool is disclosed which includes a tool body having a plurality of mounting recesses formed on an end thereof. Each of the mounting recesses has a mounting face respectively formed at the bottom thereof. The mounting face has a first threaded hole formed therein. A plurality of inserts are each respectively disposed on the mounting face and secured pressed onto the mounting face by means of a clamping screw screwed into the first threaded hole. The cutting tool is characterized in having a plurality of reduced hardness regions respectively formed under the mounting face inside the tool body, each of the reduced hardness regions having the first threaded hole formed therein, the reduced hardness regions having a hardness lower than the hardness of the tool body.

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 cutting or drawing tool, in which a cutter plate can be precisely located and positioned by means of an adjusting device, in order to produce high-precision profiles. By provision of a second cutter plate, a further face of the workpiece can be machined in a specific relative position to the profile, possibly in a single operation but at least in one setting.

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: 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 ball end mill includes an end mill body, an indexable cutter insert, a clamp screw and shift preventing mechanism. The body has an insert receiving recess formed in a forward end portion thereof. The insert has a front face, a rear face and at least two convexly curved side faces, and has at least two convexly curved main cutting edges each defined by the intersection of a respective one of the convexly curved side faces with the front face. The insert is received in the insert receiving recess with the rear face mated with the bottom face of the recess in such a manner that one of the main cutting edges is indexed in a cutting position.

Abstract: An improved machining device is disclosed which is particularly well suited for machining of a wide variety of materials and in particular elastomeric materials such as for example synthetic rubber employed in manufacture of motor vehicle tires. The machining device comprises a rotatable wheel having secured around the periphery in spaced relationship a plurality of replaceable cutting inserts each of which incorporates piercing corner portions having an acute included angle followed by a sharp linear edge portion operable to produce a clean severing action which results in a finely textured machined surface. Each of the inserts also incorporates a securing arrangement which allows the cutter inserts to be quickly and easily secured to the wheel and also accurately locates the cutting edges thereof along a common circle concentric with the axis of rotation of the wheel. Various arrangements are also disclosed for preventing rotational movement of the cutter insert during use thereof.

Abstract: The invention relates to a debarking means for rotation ring type barking machines, and of the type comprising a plurality of swinging arms (1) yieldably engaging the circumference of an unbarked log and each formed at its free end with a seat (4) for a debarking means (2) detachably mounted by means of a bolt connection (3). The debarking means has a leading edge (7) serving as a cutting edge and a trailing support edge or surface (8) adapted to engage a shoulder (5) on the seat (4) to prevent turning of said debarking means relative to the arm. The support edge (8) extends obliquely in relation to the cutting edge (7), more particularly along the entire width of the debarking means and between two side edges of said means which are of different length.

Abstract: A stick tool construction in which the cutting tip is easily and readily replaceable from the body. The cutting tip has a through hole and a fastening arrangement is provided passing through the hole in the tip. The fastening arrangement includes a cupped member supported by a spring on one side and a retaining screw on the other side of the body.

Abstract: The invention relates to a tool preferably for turning, and an insert therefor. The tool comprises a shank (11) upon which a loop-shaped outer disc (12) is secured. An inner disc (13) is displaceably arranged between the arms of the outer disc (12). A screw (15) is arranged to push the inner disc (13) forwards relative to the outer disc during inward screwing, such that the fore ends of the inner disc force the lower face of the insert against the upper face of the shank (11). The insert (14) is provided with a hole which is arranged to be wedged up on a pin (36) extending in the hole during a forward movement of the insert at the same time as the pin and the hole comprise cooperating surfaces to force the lower face of the insert against the upper face of the shank.

Abstract: A conical cutting insert. The insert is comprised of a body member with first and second end sections oppositely disposed from a median plane. One or both of the end sections may be provided with a cutting edge. The cutting edge is formed by the intersection of an interior outwardly tapered cutting surface and an exterior inwardly tapered flank surface. The cutting surface may be frustro-conical or one or more planar surfaces. The flank surface may be frustro-conical or one or more planar surfaces. Where planar surfaces are utilized, the cutting edges are linear. Where frustro-conical surfaces are utilized, the cutting edge is circular. A plurality of coolant flow orifices are provided to allow the flow of coolant on one or both of the flank surface and cutting surface. Chip flow grooves may be provided on the cutting surface to guide and/or break chips during the cutting operation. Lobes may be provided on the flank surface to provide a constant flank angle during the cutting operation.

Abstract: Thread-cutting apparatus includes an indexable insert having multiple thread-cutting profiles. The invention may be embodied either in a thread-milling insert or a thread-chasing insert. The insert is configured to provide clearance for internal threading and to enable cutting force to be directed through a large cross-sectional area of the insert.

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 conical cutting insert. The insert is comprised of a body member with first and second end sections oppositely disposed from a median plane. One or both of the end sections may be provided with a cutting edge. The cutting edge is formed by the intersection of an interior outwardly tapered cutting surface and an exterior inwardly tapered flank surface. The cutting surface may be frustro-conical or one or more planar surfaces. The flank surface may be frustro-conical or one or more planar surfaces. Where planar surfaces are utilized, the cutting edges are linear. Where frustro-conical surfaces are utilized, the cutting edge is circular. A plurality of coolant flow orifices are provided to allow the flow of coolant on one or both of the flank surface and cutting surface. Chip flow grooves may be provided on the cutting surface to guide and/or break chips during the cutting operation. Lobes may be provided on the flank surface to provide a constant flank angle during the cutting operation.

Abstract: A cutting insert and, in one embodiment, a grooving cutter, is formed so that multiple cutting edges are disposed in the cutting path. Rectangular cutting inserts and radial cutting inserts are contemplated. The rectangular shape is most suited for small tools and equally so for internal applications. Multiple radial cutting inserts can be mounted equally radially disposed, but differently angularly disposed from each other, for providing a grooving cutter. The cutting inserts and tool assemblies thereof may be used for OD grooving, threading, relieving, trepanning, face grooving, slotting and milling.