Abstract: The invention relates to a cutting tool comprising a main part that can be rotationally driven about a rotational axis, at least one cutting insert holder mounted on the main part such that it can be radially adjusted, and an adjusting device for adjusting the position of the cutting insert holder relative to the main part. The cutting insert holder is mounted in a guide recess in the main part such that it can be moved transversely, preferably radially, to the rotational axis, and the adjusting device has a control rod that is arranged axially movable inside the main part and supports the cutting insert holder. The cutting tool can be of the multi-point cutting tool type. The invention also relates to a method for machining a bearing tunnel by means of such a multi-point cutting tool.

Abstract: A setting mechanism for a settable tool holder adapter includes a differential screw having two thread portions of differing pitch but identical direction of hand and a pressure piece having a pressure piece thread. One of the thread portions of the differential screw is screwed into the thread of the pressure piece.

Abstract: A case mouth chamfer tool utilizes an easily adjustable cutter holder member. The adjustable cutter holder member slides in a dovetail, is adjusted by advancing and retreating a screw, and is held in place by a set screw. The case mouth chamfer tool may be fixed to a micrometer dial threadedly engaging a barrel. A case adapter bearing is fixed to the barrel. The case mouth chamfer tool is adjusted to cut an inside chamfer and the micrometer dial is rotated to adjust the position of the case mouth chamfer tool with respect to the case adapter bearing to precisely adjust the amount of material cut from the case. The case adapter bearing is easily changed to chamfer different cases.

Abstract: A holder for a cutting tool includes a body having a first channel for receiving a stem portion of the cutting tool. The body has a second channel intersecting with the first channel. The holder further includes a plunger to be inserted in the second channel, the plunger having a third channel the cross section of which at least partly overlaps with the cross section of the first channel when the plunger is inserted into the body so as to enable the stem of the cutting tool to extend into the third channel when the stem is inserted in the first channel. The holder further includes a mechanism for locking the stem against movement relative to the body by means of the plunger. A cutting tool for use in such a holder and a cutting insert are also provided.

Abstract: A tool cartridge for a material removal tool has a cartridge body with, among other things, a recess extending through at least a portion of the cartridge body from a first side toward a second side, a long axis of the recess non-parallel to a long axis of the cartridge body and at least a portion of the recess open to a bottom side of the cartridge body, and a threaded opening for a differential screw proximate a second end of the tool body and positioned longitudinally between an opening for a clamping screw and at least a portion of a seat for a cutting tool insert. A thread axis of the threaded opening is at an angle G relative to a long axis of the tool cartridge. A material removal tool, a tool, and a method of adjusting a cutting tool insert are also disclosed.

Abstract: The boring head has a tool body (2, 38), to which two cutter holders (3, 4; 22, 23) arranged offset from one another by 180° are fastened. The cutter holders (3, 4; 22, 23) are mounted on a clamping surface (11, 26) in a slidable manner for radially adjusting the cutters (5). The clamping surface (11, 26) has a first partial clamping surface (11a, 26a) for the one cutter holder (3, 4; 22, 23) and a second partial clamping surface (11b, 26b) for the other cutter holder (3, 4; 22, 23). These two partial clamping surfaces (11a, 11b; 26a, 26b) are offset in the axial direction by a certain extent. The two cutter holders (3, 4; 22, 23) have different heights with respect to the cutters (5) in accordance with this extent and in addition can be optionally fastened to and radially adjusted on the first partial clamping surface (11a, 26a) or the second partial clamping surface (11b, 26b). The boring head permits the conventional roughing work and is especially stable while being produced at a low cost.

Abstract: A precision turning tool has a rotatingly drivable tool body. A tool slide and corresponding compensating slide are displaceably mounted in the tool body. The tool slide is displaceable along an axis of adjustment aligned at right angles to an axis of rotation of the tool body. The compensating slide is automatically displaceable along an axis of compensation aligned parallel to the axis of adjustment contrary to the movement of the tool slide to compensate for any imbalance. At an end projecting out of the tool body in the direction of adjustment the tool slide has a mounting surface, on which a cutting plate carrier can be mounted. An electronic distance measuring system is provided with a display unit and an energy supply device, wherein the distance of adjustment of the tool slide can be detected by means of the distance measuring system and displayed.

Abstract: An insert attached to a tool body of a hole machining tool having an attachment seat and a pressing member for pressing the insert to adjust the position of a peripheral cutting edge in a diameter direction of the tool. The insert has a panel shape. One surface of the insert in a thickness direction provides a seating surface, the other surface in the thickness direction provides a peripheral flank surface. A surface facing the rear side of the insert in a tool rotation direction provides a pressed surface in a state that the insert is attached to the attachment seat. A side surface facing the front side in the tool rotation direction provides an inclined surface, and a peripheral cutting edge is formed at a ridge portion outside of the inclined surface in the diameter direction of the tool.

Abstract: A cartridge assembly for use on a boring bar includes: a main body having an internal thread disposed about an axis; a tubular shaft movable with respect to the main body along the axis, the shaft having an internal thread and a portion structured to receive a cutting mechanism; a torque-receiving assembly having a first and second threaded parts, the first threaded part cooperatively engaging the internal thread of the shaft, the second threaded part cooperatively engaging the internal thread of the main body; and an entrainment cover coupled to the torque-receiving assembly and rotatable with respect to the main body about the axis. The entrainment cover interacts with the main body in a manner that produces an indicating click upon rotation thereof, each click being indicative of a distance the shaft is displaced in regard to the main body as a result of the rotation of the entrainment cover.

Abstract: A cutting tool has a shank with a circumferential groove and an adjustment ring releasably secured to the shank at the groove. The adjustment ring has a threaded through bore in which a screw is screw mounted and engages the groove. The adjustment ring has an adjustment member which engages the groove and which is positioned diametrically opposite the threaded through bore. When the screw is tightened it exert a purely radially directed force on the groove thereby inducing displacement of the adjustment member radially inwardly and the adjustment member exerts non-radially directed forces on the groove, thereby inducing a bending moment on the shank for correction of radial runout.

Abstract: The invention concerns a boring tool comprising a main tool body and a tool holder which is adjustable relative thereto, as well as a counterweight coupled to the tool holder in such a way that upon a movement of the tool holder in one direction a movement of the counterweight occurs substantially in the opposite direction, wherein both the tool holder and also the counterweight are respectively arranged at least in part in a bore in the main tool body. To provide a boring tool of the above-mentioned kind which is suitable in particular for high rotary speeds, which is advantageous in terms of manufacture and which in addition provides a reliable precise balancing function, it is proposed in accordance with the invention that a tool holder and a counterweight are arranged in the same bore in the main tool body.

Abstract: The present invention concerns a bore head, which consists essentially of a body (1) provided with a radial piston (2) for receiving a bore tool (3) which can be tightened in said radial piston (2) with a tightening means (4), where the position of said radial piston (2) can be regulated by means of a micrometric screw (5), and where the radial piston is guided and tightened in the regulation position with a guidance and tightening means, and where, moreover, said body is provided with a balancing device (7) with balancing weights (8 and 9). Bore head characterized in that the means (4) for tightening the bore tool (3) in the radial piston (2) of the body (1) is in the form of a screwing device (10), equipped with a movable center punch (11) which is under tension caused by a spring (12), and in that the means for guidance and tightening in the position of regulation of the radial piston (2) is an indirect tightening means which carries out said guidance and tightening radially.

Abstract: A cutting tool has an adjustment mechanism for adjusting the location of a cutting insert seated therein. The cutting tool has a tool body provided with an adjustment bore and an abutment member bore intersecting the adjustment bore, and also has an abutment member and a worm screw. The abutment member is located in the abutment member bore and the worm screw is located in the adjustment bore and screw threaded into the worm screw bore. The abutment member is located in a first location along the abutment member bore when the worm screw is in a first screw rotated position and the abutment member is located in a second location along the abutment member bore when the worm screw is in a second screw rotated position.

Abstract: An insert for a deburring tool is used to machine openings of bores that are formed in metal work pieces. In an exemplary embodiment, the insert has an inward portion, a central portion connected to the inward portion, and an outward portion connected to the central portion. The central portion has a dovetail-shaped retaining feature that attaches the insert to the deburring tool.

Abstract: The invention relates to a base body for a drilling tool, in particular to drilling/grinding tool whose front surface (14) can accommodate a cutting insert holder (2). Said invention also relates to a cutting insert holder used with said base body (1) provided with a seat for receiving a cutting insert (13, 13?, 13?). The aim of the invention is to develop a flexibly usable drilling tool whose cutting insert holder can be adjusted in a simple and accurate manner and is not expensive. For this purpose, at least one adjusting pin (4) which is connected to the base body (1) axially overlaps the cutting insert holder (2) and/or the cutting insert in such a way that a radial adjustment of the cutting insert holder (2) with respect to the base body (1) can be carried out by measuring the radial deviation (a) between the defined point of the cutting insert holder (2) or a cutting insert (3, 3?, 3?) accommodated thereby and the adjusting pin (4).

Abstract: The present invention concerns a boring-out tool comprising a main tool body having an interface for a drive, and a cutting insert holder which can be fastened to the main tool body and has a seat for a cutting insert, wherein the cutting insert holder can be moved in the radial direction relative to the main tool body between two positions. To provide a boring-out tool of the kind set forth in the opening part of this specification, which can be easily adapted to different boring diameters so that only few different boring-out tools have to be stocked to be able to cover all usual boring diameters, it is proposed in accordance with the invention that there is provided an extension arm which on the one hand is fastened to the main tool body and which on the other hand carries the cutting insert holder, wherein the cutting insert holder can be fastened to the extension arm at least two positions which are spaced from each other in the radial direction.

Abstract: A deburring tool for deburring an aperture of a work piece is disclosed. The tool includes an arbor rotatable about a central axis and having proximal and distal ends spaced from each other along the central axis. The arbor defines a slot between the proximal and distal ends. The tool includes a cutter coupled to the distal end and rotatable about a pivot axis between a cutting position, a first non-cutting position, and a second non-cutting position opposite the first non-cutting position. The tool includes a pivot disposed through the cutter and coupled to the distal end of the arbor. The tool includes a lever disposed in the slot of the arbor and movable between an engaged position engaging the pivot for applying a load to the pivot and the cutter and a disengaged position spaced from the pivot for removing the pivot and the cutter from the arbor.

Abstract: A recess and an attachment seat are formed in a front end of a tool body. A panel-shaped insert attached to the attachment seat where the thickness direction is matched with the diameter direction of the tool body and a surface of the insert facing the rear in a tool rotation direction becomes a pressed surface. A peripheral cutting edge is formed at a ridge of an inclined surface on the outside in the diameter direction of the tool body, a bevel edge is formed at a ridge on the front side of the tool body, and a back taper is attached to the peripheral cutting edge. A pressing member for pressing the pressed surface of the insert to adjust a position of the peripheral cutting edge in the diameter direction of the tool body is disposed on the rear side of the attachment seat in the tool rotation direction.

Abstract: Embodiments of the present invention provide a boring bar tool including a tool carrier adapted to translate along a boring bar. Adjustable guide members may be coupled with the tool carrier and adapted to contact the boring bar. The guide members may also be adapted to sufficiently support the tool carrier on the boring bar.

Abstract: A micro-adjustable differential screw assembly for providing fine adjustment of the axial and/or radial position of a cutting insert is disclosed. The micro-adjustable differential screw assembly can be mounted directly to a boring bar or to a mounting cartridge, which in turn, can be mounted to the boring bar. An axial micro-adjustable differential screw assembly provides fine adjustment of an axial position of the cutting insert, while a radial micro-adjustable differential screw assembly provides fine adjustment of a radial position of the cutting insert. The differential screw assembly includes a rotatable drive screw with threads of different thread pitches, and a non-rotatable adjusting screw with threads for mating with the drive screw.

Abstract: The invention concerns a boring tool comprising a main tool body and a tool holder which is adjustable relative thereto, as well as a counterweight coupled to the tool holder in such a way that upon a movement of the tool holder in one direction a movement of the counterweight occurs substantially in the opposite direction, wherein both the tool holder and also the counterweight are respectively arranged at least in part in a bore in the main tool body. To provide a boring tool of the above-mentioned kind which is suitable in particular for high rotary speeds, which is advantageous in terms of manufacture and which in addition provides a reliable precise balancing function, it is proposed in accordance with the invention that a tool holder and a counterweight are arranged in the same bore in the main tool body.

Abstract: The invention concerns a boring tool comprising a main tool body and a tool holder which is adjustable relative thereto, as well as a counterweight coupled to the tool holder in such a way that upon a movement of the tool holder in one direction a movement of the counterweight occurs substantially in the opposite direction, wherein both the tool holder and also the counterweight are respectively arranged at least in part in a bore in the main tool body. To provide a boring tool of the above-mentioned kind which is suitable in particular for high rotary speeds, which is advantageous in terms of manufacture and which in addition provides a reliable precise balancing function, it is proposed in accordance with the invention that the main tool body has a clamping device, by means of which the main tool body can be elastically deformed so that both the tool holder and also the counterweight are respectively clamped in the bore.

Abstract: The boring tool has a tool body (2) on which a tool carrier (10) is mounted in a radially adjustable manner. A setting member (42) serves to set the boring diameter. A drive mechanism converts a rotation of the setting member (42) into a displacement of the tool carrier (10). The drive mechanism has a differential spindle (13) which converts a rotation of a graduated disk (26) into a displacement of the tool carrier (10) for the fine setting of the boring diameter. The differential spindle (13) is mounted in a bore (51) of the tool carrier (10) and extends at right angles to the rotation axis (A).

Abstract: A debeading tool capable of internally debeading butt-welded pipe made of PVC and similarly hard plastics has a work head that can be coupled to a distal end of a torque tube. The work head includes a motor carrying a cutter which is oriented at an angle, e.g., 12 degrees, to the interior pipe wall for cutting the weld bead as the tool is rotated inside the pipe. The work head cutter can be moved between an insertion/removal position away from the side wall and a cutting position against the bead on the side wall. A locator assembly that contacts the bead during insertion of the work head aids in positioning the cutter to straddle the weld bead. A pipe cleaner can be prepositioned in the pipe before butt-welding to be engaged upon removal of the work head to pull weld bead chips and fines from the pipe.

Abstract: A deburring tool has a cutting insert slidably supported therein. The deburring cutting insert has a cylindrical major body and is moveable between a retracted position and an extended position by means of a biasing spring located alongside the cutting insert.

Abstract: A deburring tool includes a blade having a cutting head portion, an anchor portion, and a retention spring. An arbor is adapted to removably mount the blade such that the head portion of the blade is adapted to be elevated a predetermined distance from the arbor in an unstressed condition of the blade. The blade is sufficiently resiliently yieldable such that the head portion of the blade can move inwardly relative to the arbor during deburring operations. A holder is adapted to mount the arbor and an adjustment member adapted to operatively engage the anchor portion of the blade. The anchor portion of the blade is adapted to move in response to adjustment of the adjustment member in a direction substantially opposite that of the head portion and flex to elevate the head portion relative to the arbor for deburring operations or recess the head portion relative to the arbor.

Abstract: One or more embodiments of the invention enable a boring head to hold a boring tool at an adjustable offset from the axis of rotation in a balanced configuration while maintaining stability when rotating at high speed. The apparatus comprises a boring head body, a bar holder and dial screw, a boring bar, a balance shaft and a balance weight. The apparatus may be configured for a given diameter of operation through use of alternate size components and offsetting a balance weight to account for the components in use. One method of determining the various components to use comprises weighing the various components and creating a lookup table for quick lookup to enable machinists to quickly change the bore range on a machine.

Abstract: A rotationally driven cutting tool for machining of workpieces, in which at least one cutting insert is fastened detachably in a pocket of a blade bearer so that it is clamped flatly against a base surface of the pocket. For adjustment of the blade there is a cutting insert and a fine adjustment device with which, with the aid of an adjusting screw arrangement, an adjusting element supported on a lateral wall of the cutting insert can be adjusted relative to the cutting insert. The adjusting screw arrangement comprises a threaded sleeve that is held, preferably with play, in a smooth through opening having a narrow point and comprises a screw part in functional engagement therewith that stands in a chain of pressure force with the adjusting element.

Abstract: A boring tool for use in a tool holder, such as a boring head, that is driven about a drive axis and includes a pair of parallel bores for mounting boring tools generally includes a body including a cutting edge and a pair of mounting shanks for mounting in the bores of the tool holder. Preferably, the mounting shanks can be mounted in either bore and the cutting edge is disposed on the body so as to be different distances from the driven axis depending upon in which bores the mounting shanks are mounted.

Abstract: A tool for chip removing machining includes a drill and a countersink mounted to the drill. The drill includes a protruding land and at least one chip flute. The countersink includes a body, a plurality of inserts received in respective insert pockets formed in the body, and a plurality of clamps for fixing respective inserts in the pockets. In order to be able to adjust the location of the inserts, pins are arranged for displacement relative to the body. The pins are slidably disposed in holes formed in the body, and adjustment screws are mounted in the body and arranged to displace a respective pin and the associated clamp and cutting insert in response to movement of the adjustment screw.

Abstract: A portable boring/facing machine using a single drive motor for rotating a boring bar and for either axially translating a cutting head assembly along the bar or radially moving the blade of the cutting head assembly using a lead screw. The machine utilizing two mounting brackets is attachable to the workpiece for alignment with the workpiece.

Abstract: An adjustable deburring tool has a cutting head and a shank. The cutting head has a projecting ridge with a recessed portion. The shank has a groove that communicates with an open ended and open sided threaded bore. The ridge is slidably located in the groove with an adjusting screw screw-threaded in the threaded adjusting bore and partially located in the recessed portion of the ridge so that rotation of the adjusting screw causes lateral movement of the cutting head thereby adjusting the cutting diameter of the deburring tool.

Abstract: A deburring tool is adapted to be rotatably mounted in a chuck of a drive motor to perform deburring operations. The deburring tool includes an arbor and a blade having a cutting head portion defined at one end thereof and a clip portion defined substantially at the other end of the blade opposite the head portion. The blade is mounted relative to the arbor such that the blade projects a predetermined distance from the arbor in an unstressed condition. The blade is sufficiently resiliently yieldable such that it can move inwardly with respect to the arbor during deburring operations. The clip portion is adapted to flex to provide a spring-like force acting along the blade toward the head portion to facilitate insertion and removal of the blade relative to the deburring tool without use of any tools.

Abstract: The invention relates to a tool head, especially a fine drill head, comprising a machine shank and a tool shank having a joint center axis, wherein the tool shank has a rigid core and a head with a tool, supported by a parallel spring arrangement and is able to be elastically displaced in relation thereto, said head having several limbs which emanate therefrom and form the parallel spring arrangement, whereby at least one of said limbs is fixed to the core or machine shank. The inventive tool head also comprises a device for radial displacement of the head in relation to the core, comprising a positioning device which has a conical part and is guided inside the core. The conical part bears against a contact part of the parallel spring arrangement under pressure when in use. The core is configured with the parallel spring arrangement in a single piece.

Abstract: A tool for removing material or machining the end of a pipe. The tool having at least one and preferably two blade plates. Each blade plate includes a first cutter for machining an end surface of the pipe, a second cutter adjacent the first cutter for producing an internal chamfer in the pipe end and a third cutter adjacent the first cutter positioned for producing an external chamfer adjoining the end surface of the pipe end. Devices guide and permit movement of the cutters either radially or axially. The shaping of the cutter is disclosed.

Abstract: A boring head, essentially consists of a body (1) provided with a housing (2) for receiving two tool-holders (3), capable of being radially driven via a moving device (4), and of element (5) for locking the tool-holders (3) in operational position. The boring head is characterized in that the element (5) locking the tool-holders (3) in operational position consists of a single clamping device simultaneously acting on the two tool-holders (3) and on the body (1). The invention is more particularly applicable in the field of machine-tool accessories, in particular digitally controlled machines, of machining plants and adaptable cells and workshops.

Abstract: The invention relates to a drilling tool comprising a tool holder, on whose front face interchangeable cutting attachments are fixed and which has a shaft part on the opposite end to said attachments and an adjusting device for minimizing the tolerance measurement determined by the drilling system. In order to improve the aforementioned adjusting device, the invention is characterized in that the tool holder (1) has groove-shaped recesses (5, 8), which lie on respective diametrically opposed sides and which are eccentrically arranged on a plane that is perpendicular to the longitudinal axis of the tool holder. Said groove-shaped recesses have a half-cylinder extension on each of the sides facing the longitudinal axis of the tool holder. A bolt (2, 3), whose dimensions correspond to the size of the cylinder, is located in each extension. The first bolt (2) is connected to a tapered adjusting element (9) using a double-threaded screw (11) which is positioned radially in relation to the tool holder (1).

Abstract: A deburring tool is adapted to be rotatably mounted in a chuck of a drive motor to perform deburring operations. The deburring tool includes an arbor and a blade having a cutting head portion defined at one end thereof and a clip portion defined substantially at the other end of the blade opposite the head portion. The blade is mounted relative to the arbor such that the blade projects a predetermined distance from the arbor in an unstressed condition. The blade is sufficiently resiliently yieldable such that it can move inwardly with respect to the arbor during deburring operations. The clip portion is adapted to flex to provide a spring-like force acting along the blade toward the head portion to facilitate insertion and removal of the blade relative to the deburring tool without use of any tools.

Abstract: The invention relates to a boring tool that includes a boring bar having a center axis which at a top portion of the bar is arranged to be connected to a machine tool, and which at a bottom portion of the bar along the center axis is slit into two legs. The two legs can be movable towards or away from each other, such as by means of an adjusting screw, for exact adjustment of the position of the cutting tool with relation to the center axis. The tool is arranged in such a way that a joint through bar is detachably attached to the bottom of each of the legs of the boring bar. This joint through bar extends essentially perpendicular to the slit and center axis, and enables a cutting tool to be provided at the end of the bar. Hereby an especially simple tool is obtained which can be adjusted extremely precisely for fine machining of holes.

Abstract: A reamer includes: (a) an axially-distal-end small-diameter portion; (b) a guide portion which is axially adjacent to the small-diameter portion; (c) at least one flute which is formed in an outer circumferential surface of the reamer and which extends from the axially distal end of the reamer toward the axially distal end of the reamer; and (d) at least one land surface which is circumferentially adjacent to the flute. The land has a cutting blade portion formed therein in the axially-distal-end small-diameter portion. A first radial distance from an axis of the reamer to a radically outer end of the cutting blade portion is larger than a second radial distance from the axis to the land surface in the axially-distal-end small-diameter portion. The first radial distance is smaller than a third radial distance from the axis to the land surface in the guide portion.

Abstract: A cutting blade 16, and a method of securing the blade 16 in a reamer 11 having an axial recess 19 in the body 13 of the reamer. The cutting blade 16 has parallel serrations 35 in its rear face 37 extending normally of each cutting edge 34 and is clamped to mutually interengagable parallel serrations 36 on the reamer 11 which extend radially thereof. The cutting edge 34 of the blade 16 is adjusted to a new position by movement of the blade along the radial serrations 36 using a single adjuster means 42.

Abstract: A circulating tool for cutting of workpieces including a carrier element that bears at least one cutter blade insert in an exactly positioned manner. A device is provided for adjusting the position of the insert relative to the carrier element and a clamping device is provided using a clamping claw, with which the insert can be fixed in the adjusted position relative to the carrier element in that the clamping claw presses the insert flat against a support surface. In order to be able to use indexable inserts of any form without providing weakening openings and to obtain the greatest possible measure of free space for configuring the tool and shaving removal with a space-saving configuration of the adjusting and clamping apparatus, the insert is accommodated in a pocket of the clamping claw and the support surface is directly constructed on the carrier element.

Abstract: The invention concerns a boring head, essentially consisting of a body (1) provided with a housing (2) for receiving two tool-holders (3), capable of being radially driven via a moving device (4), and of means (5) for locking the tool-holders (3) in operational position. Said boring head is characterised in that the means (5) locking the tool-holders (3) in operational position consists of a single clamping device simultaneously acting on the two tool-holders (3) and on the body (1). The invention is more particularly applicable in the field of machine-tool accessories, in particular digitally controlled machines, of machining plants and adaptable cells and workshops.

Abstract: A tool assembly affording a wider range of adjustment of machining diameter, comprises a boring bar and a tool cartridge supporting a cutting tip and attached to the boring bar. The tool cartridge chassis is pivotably attached via a pin within a recess formed in boring bar; an adjustment screw is provided to a first side of the pivot axis, the screw being threaded into the cartridge chassis and situated in abutment with a surface of the bar. A compression spring is provided to a second side of the pivot axis, interposed between the boring bar and the cartridge chassis. Appreciable pivotal motion can be imparted to the cartridge chassis by loosening or tightening the adjustment screw. Adjustments can be made automatically by providing a draw-bar.

Abstract: The invention relates to a friction and sinking cutting tool comprising a base member (2) to which a cutting blade (20) is exchangeably clampingly fixed by means of a clamping screw and which is adjustable in terms of its radial position by an adjusting member (40) through the intermediary of an adjusting means (30). The adjusting means (30) is a cutting blade carrier extending into a recess in the base member, and the adjusting member (40) is a differential screw which is in threaded engagement with the adjusting means. Alternatively, the adjusting means (30) can be a cutting blade carrier extending into a recess of the base member and the adjusting member (40) can be a ball member or clamping member which has automatic shape fitting engagement with a complementary recess in the adjusting means such that a movement of the adjustment member causes a movement of the cutting blade (20) in the same direction.

Abstract: A tool holder has a housing rotatable about a holder axis, a motor mounted on the housing and having an output rotatable about a motor axis transverse to the holder axis, and a rotation sensor mounted on the housing and coupled coaxially to the motor. A drive wheel mounted on the rotary motor output is rotatable by the motor about the motor axis and is connected to respective wheels of a pair of shafts each having a screwthread. The screwthreads are of opposite hand and respective nuts threaded on the shafts so that rotation of the motor output synchronously rotates the shafts and oppositely displaces the nuts. A tool-holding slide displaceable transversely of the axis on the plate is fixed to the nut of one of the shafts and a counterweight displaceable transversely of the axis on the plate is coupled to the nut of the other shaft.

Abstract: A rotatable machine tool such as a precision boring tool has a head (2) that is detachably mounted on a shank type driving element (3). The head carries a removable cutting tip (9) and includes a bearing point (8) that wedgingly seats within a transverse slideway (7) in driving element (3). A slide (11), which is mounted in through bore (20) in head (2), has a male member (10) attached thereto which passes through a slot (24) extending between the bore (20) and an end face (19) of the head (2). Male member (10) is received within a bore (12) in driving element (3). A clamping screw (13) in drive element (3) interacts with male member (10) to cam it inwardly thereby clamping head (2) in position on drive element (3). The head (2) is transversely adjustable within slideway (7) by loosening screw (13) and adjusting opposed screws (32, 33) in head (2) which act on male member (10).

Abstract: The boring head has a fine movement mechanism for the tool support and a counterweight mounted in the tool body. In order to compensate for imbalance during the adjustment of the cutting tool, the counterweight is moved automatically in the opposite direction by means of a transmission device. The tool support, the counterweight, and the setting screw of the fine movement mechanism can all be simultaneously clamped firmly to the clamping organ.

Abstract: An adjustable reamer includes a securing portion, a shank, a guide members, at least one cutting insert, an adjustment device for adjusting the insert, and a clamp for clamping the insert. The clamp is releasable from the shank. A first place of contact is created between the clamp and the shank, and a second place of contact is created between the clamp and the cutting insert. An angle between the first and second places of contact in relation to the rotational axis of the reamer is at least 100.degree., preferably larger than 135.degree..

Abstract: For the purpose of rigid connection of the cutter holder (9) to the tool carrier (5), the tool carrier (5) has a driving key (11) on its end side, which driving key is inserted into a corresponding transverse groove (13). The driving key (11) has a specified excess size compared to the transverse groove (13), such that when a setscrew (10) is tightened the tool carrier (5) and the cutter holder (9) are elastically deformed. Laterally next to the transverse groove (13) the surface of the cutter holder (9) is supported on the tool carrier (5).