Abstract: A machining tool, especially a milling tool, includes a shaft-like holder defining a longitudinal axis (13). A seat (9) is provided in the front face of the holder for a cutting plate that can be inserted into the holder. The cutting plate has a coupling part for mounting in the seat (9) of the holder. The coupling part has three ribs which project axially from the end surface of the cutting plate that is opposite the holder and which extend radially. The ribs are provided for engagement in complementary grooves (31) configured in the seat (9) of the holder. Their side walls (37 and 35) form driving surfaces and support surfaces, which interact for transmitting a machining torque, or as axial position safety-catch, with corresponding surfaces of the flanks of the ribs of the cutting plate.

Abstract: A new design and configuration for tree stump cutting tooth and its corresponding holding bracket. Notch(s) on the tooth and rib(s) on the bracket are used to allow fast installation of tooth without gauging, reduced the time needed for such necessary tasks. The notch/rib structure also increases the clamping power of the bracket, reducing the possibility that any tooth would fly out, due to the centrifugal force, and cause injury. Wide notches are employed on certain heavy-duty tooth and allow the installation to be done quickly in two positions, and a small range in between the two positions.

Abstract: A cutting tool body that is adapted for use in milling operations comprises at least one pocket for supporting a cutting insert. The pocket is defined, at least in part, by a cylindrical wall and a seating surface within the tool body. At least one passage is provided through the tool body for evacuating chips upward and away from the surface of a workpiece. The seating surface of the pocket extends radially inward from the cylindrical wall and intersects the passage through the tool body. At least one slot traverses the pocket to separate a part of the tool body into first and second portions, at least one of which is movable relative to the other for clamping the cutting insert into the pocket.

Abstract: A rotary slot milling cutter has a plurality of cutting portions, each cutting portion having an insert pocket and a cutting insert removably mounted therein. The cutting insert includes a top face and a bottom face which has two spaced-apart abutments, with a ceiling formed therebetween. The insert pocket has a generally axially disposed pocket base provided with two support surfaces and a radially extending rib disposed therebetween, the rib having a roof and two banks. When the cutting insert is mounted in the insert pocket, the abutment platforms abut the support surfaces, and a gap exists between the roof of the rib and the ceiling, and between each side-slope and adjacent banks.

Abstract: A tool such as a milling or drilling tool includes a shaft having a front recess in which a cutting head is disposed. A drawbar disposed in the shaft includes a plurality of flexible tongues disposed in the recess. The tongues form a recess in which a rear knob of the cutting head is received. A retainer urges the drawbar axially rearwardly to retain the cutting head in the recess. The shaft includes axial projections at its front end which are received in respective rearwardly open recesses of the cutting head to prevent relative rotation between the shaft and the cutting head.

Abstract: A wear insert for a tool holder includes a top surface and a bottom surface with a dimple disposed in the top surface. A boss is disposed within the dimple. The tool holder for releasably securing the wear insert has a tool holder body including an insert-receiving pocket formed at a forward end. The tool holder body has a bottom and at least one side wall for receiving an insert. The tool holder includes an internally threaded clamp-securing bore formed between an inclined surface and the insert-receiving pocket. A clamp is arranged on the tool holder body and including a lower face with a nose portion having a shaped lip and a clamp contour portion. The clamp also has a threaded aperture formed therethrough. A clamp screw is inserted into the threaded aperture of the clamp.

Abstract: A router bit with a position stop is disclosed. The router bit includes a body with a collar extending outwardly from it and a shaft extending outwardly from the collar. At least one cutter blade is mounted to the body and the cutter blade may be used to cut a profile into a workpiece. The collar has a first diameter, the shaft has a second diameter and the first diameter is larger than the second diameter. The collar has a face formed a spaced distance or height from the transition point between the collar and the body. The face rests against the upper surface of a chuck when the shaft is secured in the chuck. This allows the body and hence the cutter blades to be held a predetermined distance above the upper surface of the chuck. A second router bit may be provided to cut a complimentary second profile in a second workpiece.

Abstract: A milling cutter having a pair of clamping components mounted on a tool holder to form a slot for receiving a cutting insert. One of the clamping components forms an integral extension of the tool holder's shank. The two clamping components are fastened together by threaded fasteners. The insert is fastened to the clamping components by a second threaded fastener received in through-holes in the two components and a central opening in the cutting insert.

Abstract: A milling tool includes a milling body and a plurality of cutting inserts. The milling body has fastening devices to hold the cutting inserts in a plurality of respective insert pockets each having at least one base surface. Each of the cutting inserts has at least one cutting edge. The tool has a rotational axis and a rotational direction, as well as a feed direction and an end surface. The milling tool is provided to cut a work piece substantially in an axial direction of the tool, which is substantially perpendicular to the feed direction.

Abstract: A milling tool includes a milling body and a plurality of insert-carrying cartridges mounted in the milling body. Each cartridge includes front and rear side surfaces which oppose leading and trailing walls of a pocket formed in the milling body. The cartridge also includes inner and outer flank surfaces which interconnect the front and rear side surfaces. The body includes a slot which opens into the front side surface at a location intermediate the ends of the cartridge, to divide the body into a rigid base portion and an expandable portion. The base portion has a seat for a cutting insert. A threaded hole is formed in the slot intermediate the slot ends to receive a threaded wedge screw. Tightening of the screw causes the expandable portion to be expanded into contact with the leading wall of the pocket and thereby push the base portion into tight contact with the trailing wall of the pocket. Accordingly, the cartridge is secured within the pocket by a tight frictional contact which resists chatter.

Abstract: A rotatable cutting tool, e.g., a milling cutter, includes a rotatable base body and a cutting insert, which in addition to two opposite side surfaces has front and rear end surfaces. For axial fine-adjustment of the cutting insert, a set screw is arranged that is located in an area behind the cutting insert and inclined at an obtuse angle to a side surface of the cutting insert. During an unscrewing of the set screw, it presses against the rear end surface of the cutting insert with the purpose of moving the cutting insert in the direction axially forwards, whereby the screw, due to the obtuse angle, is centrifugally secured by means of the actual cutting insert.

Abstract: There is provided a rotatable cutting tool for supporting at least one knife in at least two alternate angular cutting configurations. The cutting tool includes a body that defines at least one cavity extending generally in a longitudinal direction of the body. Each cavity is defined by first and second knife support surfaces, which are provided in an opposing, non-parallel configuration. The first knife support surface is configured to support one of the knives that is urged against the first surface at a first hook angle, and the second knife support surface is configured to support one of the knives that is urged against the second surface at a second hook angle, which is different from the first hook angle.

Abstract: A tool for material-removing machining of workpieces of hard metal with a blade plate held by a clamping lug is suggested which is distinguished in that the blade plate (11) has a groove (25) provided on the front side (45) in which the clamping lug (13) engages.

Abstract: A cutter system that is designed to create a continuous cutting true helix while having cutting inserts that are indexable on at least two cutting edges by rotating the cutting insert. High positive radial and axial rakes enable free cutting machining with a fine finish and low horsepower consumption. The back face of the insert is substantially flat and is used for face contact on lockup with a mounting pocket on the cutter body when the insert screw is tightened. The mounting pocket is designed for ease of manufacture to limit tolerance buildup to ensure repeatable insert positioning and to maintain accuracy for a fine cutting finish. The insert screw hole is placed in the cross hole location for allowing an unobstructed cutting face and a larger diameter center core in the cutter body. The larger core creates maximum strength and allows longer cutting lengths. Prior to grinding, the insert blank can be used for multiple diameters of cutters.

Abstract: A milling tool includes a milling body and a plurality of cutting inserts. The milling body has fastening devices to hold the cutting inserts in a plurality of respective insert pockets each having at least one base surface. Each of the cutting inserts has at least one cutting edge. The tool has a rotational axis and a rotational direction, as well as a feed direction and an end surface. The milling tool is provided to cut a work piece substantially in an axial direction of the tool, which is substantially perpendicular to the feed direction.

Abstract: A hollow mill tool comprising a shank portion and a plurality of radially spaced and axially extending tool posts integrally formed with and projecting from the shank portion. Each tool post has a longitudinal cutting insert mounting face and each mounting face defines a first plurality of axially extending serrations. A cutting insert is mounted on each mounting face and each insert has a second plurality of axially extending serrations defining a back face and intermeshing with the first plurality of serrations. A threaded fastener extends through a front face of each cutting insert and is received in each of the tool posts to securely hold each cutting insert against its tool post.

Abstract: A milling cutter has a cutter body having insert pockets, with cutting inserts seated in the insert pockets. Each insert pocket has adjacent side and rear walls generally transverse to a base, the side wall being provided with two spaced apart generally flat and non-coplanar side support surfaces. Each cutting insert has a pair of opposing major side surfaces including two spaced apart generally flat and non-coplanar abutment surfaces. Upper edges of the side support surfaces abut the abutment surfaces.

Abstract: A milling tool includes a rotary milling body forming pockets for receiving respective cutting inserts. Optional cassettes can be mounted in the pockets to receive the inserts. Each insert includes two side surfaces interconnected by four edge surfaces. The insert is double-sided in that each side surface includes two pairs of cutting edges. Each pair of cutting edges includes major and minor cutting edges meeting each other at a cutting corner of the insert. One of the side surfaces includes two cutting corners disposed at opposite ends of one of the edge surfaces, and the other side surface includes two cutting corners disposed at opposite ends of another, opposite edge surface. Each of those two opposite edge surfaces includes a recess for receiving an abutment surface situated at the respective pocket, for defining a stop surface for the insert from moving in a direction parallel to the axis of rotation.

Abstract: A cutting bit for a milling tool includes a flat upper face which at least partially serves as a rake face, and a lower support face which is substantially parallel thereto. The upper face and the lower face are connected together by a peripherally extending edge face. The edge surface includes six sides each interconnecting the upper and lower faces. Each side includes first and second faces oriented in non-coplanar relationship, wherein each first face intersects the upper face to form therewith a secondary cutting edge, and each second face intersects the upper face to form therewith a main cutting edge arranged non-colinearly with respect to the secondary cutting edge. A alternating ones of the first faces form a first angle of substantially 60° to one another, and alternating ones of the second faces form a second angle of substantially 60° to one another.

Abstract: A milling cutter having a plurality of on-edge cutting inserts mounted within pockets about the peripheral wall of the cutter body includes angled pockets which not only permit a greater number of pockets to accept inserts but furthermore permits relatively easy access to insert and remove mounting screws for securing each insert within a pocket.

Abstract: A cutting tool having replaceable indexable cutting insert retained in insert pockets. Each insert pocket has a base wall and first and second rear sidewall sections. A generally circular recess having a peripheral wall extends downwardly from the base wall. The cutting insert comprises an upper surface, a side surface and a lower surface from which a cylindrical protrusion extends downwardly. A first abutment surface located on the first rear sidewall section abuts a first support surface located on the side surface of the cutting insert, a second abutment surface located on the second rear sidewall section abuts a second support surface located on the side surface of the cutting insert, and a third abutment surface located on the peripheral wall of the recess abuts a third support surface located on the cylindrical protrusion of the cutting insert.

Abstract: A cutting tool assembly having a cutting insert with a generally cylindrical portion and an axially extending radial projection. The cutting insert is located in an insert retaining portion with the axially extending radial projection protruding from an axially extending aperture. The cutting insert is clamped in position by means of a resilient radial force exerted by a resilient clamping jaw on the generally cylindrical portion of the cutting insert.

Abstract: A tangential cutting insert having two identical opposing end surfaces with two identical opposing major side surfaces and two identical opposing minor side surfaces extending between them. Each end surface has a peripheral edge containing cutting edges and four corners of which two are lowered and two are raised. Each end surface is provided with at least one projecting abutment member having a projecting abutment surface, wherein in a side view of either major side surface, the at least one projecting abutment surface is concave.

Abstract: A cutter head having blade unit mounting cavities with spaced-apart mounting points and a blade unit. Each blade unit has at least one blade edge and is configured to have the blade edge disposed to align with the blade edge of another blade unit each in other mounting cavities. This forms a substantially helical blade when each blade unit is secured adjacent at least one of the spaced-apart mounting points.

Abstract: A cutter system that is designed to create a continuous cutting true helix while having cutting inserts that are indexable on at least two cutting edges by rotating the cutting insert. High positive radial and axial rakes enable free cutting machining with a fine finish and low horsepower consumption. The back face of the insert is substantially flat and is used for face contact on lockup with a mounting pocket on the cutter body when the insert screw is tightened. The mounting pocket is designed for ease of manufacture to limit tolerance buildup to ensure repeatable insert positioning and to maintain accuracy for a fine cutting finish. The insert screw hole is placed in the cross hole location for allowing an unobstructed cutting face and a larger diameter center core in the cutter body. The larger core creates maximum strength and allows longer cutting lengths. Prior to grinding, the insert blank can be used for multiple diameters of cutters.

Abstract: A cutting tool includes a basic body having a insert seat and a rotatable cutting insert mounted on a connecting surface of the seat. The insert includes a chip cutting top side, a bottom side and an outer peripheral side, whereby there is a cutting edge in the area between the top side and the peripheral side. Formed on the connecting surface of the seat is at least one first ring formation, and formed in the bottom surface of the insert is at least one second ring formation having an equal diameter as the first ring formation. At least one of the first and second ring formations comprises a groove. The first and second ring formations are in direct or indirect engagement with each other in order to form a guide between the cutting insert and the basic body that permits rotation of the cutting insert about its own center axis and simultaneously keeps the insert in an exactly defined radial position.

Abstract: A cutting tool has a cylindrical body with a longitudinal axis. The cutting tool will have multiple teeth spaced equally or unequally along the circumference of the cutter. The cutting edges are formed along the flutes throughout the length of the cutter by these teeth. The cutting tool may also have features to receive indexable inserts along the flutes. The cutting tool may be made from different tool steels, or materials such as high-speed steels, solid carbide or indexable inserts.

Abstract: An improved slot-drilling cutter has a tool body with plate seats at the end, which are arranged symmetrically in respect to each other. Cutting plates are arranged on the seats, whose cutting edges, as well as possibly cutting edges 41, 42, are set identically, i.e. which cover each other completely in the circumferential direction. Because of this, respectively two cutting edges are active for the drilling operation, as well as for the milling operation, which increases the metal cutting yield and allows the same advancement when drilling, as well as when milling. The slot-drilling cutter is free of lateral forces because of the symmetrical design, which permits a high degree of working precision in spite of large advancement moves.

Abstract: A cutting tool assembly rotatable about an axis of rotation comprising a tool and a plurality of cutting inserts mounted therein. The tool comprises a crown affixed to a tool body. Each one of the cutting inserts has an even number of indexable cutting edges and is clamped in the tool in an insert receiving pocket that is generally radially directed. The tool body has a conical surface against which the cutting inserts abut, the conical surface extends to the periphery of the tool body, is inwardly rearwardly slanted and has equally peripherally distributed substantially radially directed recesses.

Abstract: The invention relates to a method for milling fishbone-type notches (3) which are arranged on the perimeter of a turbine shaft (2) and which are used to receive blade footings. A step-tapered preform (15) of the cross-section (3) of the notch is pre-milled in preferably three machining steps. On the basis of this preform (15), at least the substantial part of the fishbone-type cross-section form which is characterised by undercuts in the step flanks is milled in one tool passage by means of a profile milling cutter (21).

Abstract: The present invention provides a cutting insert, a rotating cutting tool holding said cutting insert and a cutting method using the tool which is able to prevent the occurrence of burrs and to cut a smooth finished surface.

Abstract: A tip-changeable rotary cutting tool in which a tip having axis-symmetrically arranged cutting edges is inserted into a groove that cuts across the center of the holder's front end is improved in machining precision, product precision, and machining performance. Forward-facing oblique locking faces 8 are provided axis-symmetrically at the front ends of jaws 3 of a holder 1. The locking faces 8 cross each other at a position a certain distance (one-third to two-thirds the width of the tip) away from the front end of the tool to lock backward-facing engaging faces 9 provided at some longitudinal midpoint position of a tip 5. The shortened distance between the cutting edge 6 and the locking position suppresses the runout deviation of the tip, decreasing the displacements of the cutting edges due to the runout deviation. A large chip pocket can also be provided.

Abstract: A slotting cutter and a method for constructing the slotting cutter. The slotting cutter is structurally divided into two portions, a central adapter portion and a cutter portion. The central adapter portion is a disk with an F-type or S-type adapter. The cutter portion is an annular ring provided with cutting insert receiving pockets, or cartridge receiving pockets. The cutter portion and a body portion are manufactured separately and combined to form the slotting cutter by a heat shrinkage method.

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

Abstract: A rotatable tool for chip removing machining includes a shaft and a cutting body connected detachably to the shaft by a drawbar. At its front end the drawbar has a locking device for effecting mechanical engagement with the cutting body. The drawbar is axially movable by an actuating element located at a distance from the locking device. Inside the cutting body there is a cavity, which communicates with an opening in a rear part of the cutting body. The opening has a smaller width than the cavity, and the locking device has a larger width than the opening in order to be able to be pressed against an interior rear surface of the cavity of the cutting body after the locking device is inserted into in the cavity.

Abstract: In a cutting blade support body for a wood working cutting head including a cylindrical support body with at least two recesses disposed in axial symmetry and extending over the full axial length of the cylindrical support body for receiving and supporting hard metal cutting blades, an annular plate is mounted on each end face of the cylindrical support body and extends over the axial ends of the recesses so as to radially fully cover the recesses and contain the cylindrical support body when exposed to high centrifugal forces.

Abstract: A cutter head, especially a chipping cutter head for chip forming timber machinery, is disclosed together with a knife and knife holder therefor. The cutter head, with a basic cutter head body, has at least one knife mounting area with holder contact surfaces inclined in a V-shape. At least one knife is detachably fixed to the respective knife mounting area by a fixing screw with the knife bearing with knife contact surfaces inclined in a V-shape against the holder contact surfaces. The fixing screw retains the knife on the knife mounting area by means of a retaining force acting in the area between the contact surfaces inclined in a V-shape.

Abstract: An insert-exchangeable, rotary tool to which throwaway inserts are detachably attached, the insert comprising substantially square-shaped face and bottom surface and an outward curved flank on each side surface, and having a positive-type shape in which an outward curved edge line formed by the face and the flank serves as a cutting edge; each flank having in a substantially center portion a flat surface portion extending to the bottom surface without contacting with the cutting edge; a major cutting edge formed by the outward curved edge line circularly extending from its lowermost point toward a periphery of the tool when the insert is attached to the insert-exchangeable, rotary tool, such that it has a negative radial rake; and the lowermost point being positioned inward a center of the outward curved major cutting edge.

Abstract: A thread-milling cutter includes a cutting head with cutting insert pockets and thread-milling inserts received in respective pockets. An attachment portion integral with the cutting head is received in a drive coupling. Each insert includes a recess forming an abutment surface that is engaged by a screw to secure the insert in the pocket. The abutment surface is inclined in a manner causing the screw to push the insert deeper into the pocket.

Abstract: A slotting cutter and a method for constructing the slotting cutter. The slotting cutter is structurally divided into two portions, a central adapter portion and a cutter portion. The central adapter portion is a disk with an F-type or S-type adapter. The cutter portion is an annular ring provided with cutting insert receiving pockets, or cartridge receiving pockets. The cutter portion and a body portion are manufactured separately and combined to form the slotting cutter by a heat shrinkage method.

Abstract: The T-slot milling cutter disclosed employs an indexable insert having two alternative edge surfaces which serve alternatively as the rake face and rear abutting face of the insert which transfers the cutting force to the rear wall of the insert pocket of the cutter. The alternative edge surfaces comprise three facets, once central to the surface and the other two receding from the central facet at equal angles thereto. They serve primarily to wedge the insert into mating angular surfaces in the rear wall of the insert pocket to secure the insert against dislodgement when held in the pocket by the customary attaching screw and, by their obliquity to the cutting direction, improve the cutting action when serving as the rake face.

Abstract: Cutter head for wood working machines comprising a carrier with at least one receptacle for detachably receiving a cutter unit and a means for adjusting the flight circle of a cutting edge of the cutter unit, wherein in order to facilitate such a cutter head in view of the manufacture and installation thereof and to improve the resharpening ability of the cutter unit, the adjusting means comprises at least one spacer arranged between the cutting edge and the receptacle in an exchangeable manner and defining the distance between the cutting edge and a bearing surface of the receptacle.

Abstract: A cutter plate, in particular a spherical face milling cutter, is provided for a cutting tool, and is made of a hard metal and has four wings with cutting edges. The cutting body, which is cruciform in a view from the front, has cutting edges, which extend from the area of the circumference of the cutting tool as far as its axis of rotation, or at least close to it. A simple clamping device, for example a clamping claw, is sufficient for fastening the cutting body on the tool body. The cutting body provides a distribution of the forces acting on one or several wings to all wings, in particular during interrupted cutting, wherein not all the cutting edges of the cutting body are in simultaneous contact with the workpiece, so that a good force transfer to the tool body is possible.

Abstract: A clamping mechanism for clamping a cutting head to an adaptor; the adaptor having a shank receiving bore and three forwardly slanted unthreaded through bores; the cutting head for clamping to the adaptor having a shank with three forwardly slanted threaded bores. The arrangement being such that with the shank inserted into the shank receiving bore the cutting head is clamped to the adaptor by three retaining screws which pass through the unthreaded through bores and are threadingly engaged by the threaded bores.

Abstract: A cutting insert for mounting on a milling cutter has a generally quadrangular shape with top and bottom surfaces, a pair of opposite first side surfaces intersecting the top surface at first cutting edges and a pair of opposite second side surfaces intersecting the top surface at second edges. Each second edge has a front cutting portion oriented substantially transversely to an adjacent first cutting edge and meeting therewith via a cutting corner. Each of the first and second side surfaces has upper and lower sections adjacent respective top and bottom surfaces, which sections have leading portions adjacent their associated cutting corner and trailing portions remote therefrom. The trailing portion of the lower section of each second side surface is at least slightly inwardly depressed relative to the leading portion of the lower section and is substantially inwardly depressed relative to the associated trailing portion of the upper section of the second side surface.

Abstract: A milling cutter comprises a holder and at least two cutting inserts. Each cutting insert has a generally hexagonal or octagonal basic shape and includes at least three major cutting edges. An edge face of each insert is provided with a step defining an exit zone for a fracture. At least one of the cutting inserts is a wiper insert and alternating ones of the cutting edges of the wiper insert are major cutting edges separated by a wiper edge. A first distance of the wiper insert extending between two diametrically opposed wiper edges is larger than a second distance of the wiper insert extending between two diametrically opposed major cutting edges.

Abstract: An end mill comprises an arbor, a tool body attached to an end of the arbor, and throw-away chips detachably attached to an end face of the tool body. Each throw-away chip has a cutting edge having a peripheral circular cutting edge section for shaping, and an end straight cutting edge section for end milling.

Abstract: A rotary cutting tool for cutting a spherical seat on a surface of a workpiece comprises a body adapted to carry cutting inserts. The body is fixed to a drive shaft which rotates the body about a longitudinal center axis of the body. The body includes a forwardly facing front surface of generally convex shape, and a plurality of insert seats formed in the front surface in circumferentially spaced relationship about the axis. Each of the seats faces forwardly and comprises recesses of generally pyramidal shape. A screw threaded hole extends through each of the seats in a rearward direction and is adapted to receive an insert fastening screw. The cutting inserts include projections of generally pyramidal shape received in respective ones of the recesses. The projections are formed by a first plurality of V-shaped parallel grooves intersected by a second plurality of V-shaped parallel grooves arranged perpendicular to the first groove.

Abstract: This invention relates to a high speed milling tool for deburring or edge radiusing of machine parts. This tool comprises a plurality of cutter inserts having corresponding edges whereby each edge mills only a portion of the machine part radius. This requires a full revolution of the tool producing a faceted approximation of the cut radius to make a complete cut. The tool offers significant improvement in part feedrate in high speed milling applications requiring either a longer tool reach or set length or parts having taller or thinner edges without effects of deflection or chatter between the part and tool.

Abstract: A cutting insert for a borer or reamer comprising a flat blade having a front face with at least one cutting edge, the front face having at least one depression, or dimple, having clamping faces therein which are frustoconical and which in use engage a clamping screw whereby the blade is held in the reamer. The clamping faces extend in a direction parallel to the cutting edge, and the depth of the depression changing continuously in longitudinal cross-section.