Abstract: A machining head for the mechanical, in particular cutting, machining, in particular for the actuation, of a workpiece, having: —a housing, —a housing-side coupling region for coupling a machining tool to be coupled to the machining head, wherein the housing-side coupling region comprises at least one coupling interface for directly coupling a machining tool to be coupled to the machining head.

Abstract: An adjustable stroke mechanism has a housing with a central axis and a wall enclosing a cavity. At least one counterweight is movably disposed within the cavity. A mounting assembly is disposed within the cavity. The mounting assembly has a workpiece attachment mechanism. A stroke adjustor couples the at least one counterweight with the mounting assembly. The stroke adjustor enables the counterweight and mounting assembly to move with respect to one another such that a distance between the counterweight and the mounting assembly is variably adjusted which, in turn, variably adjusts a stroke radius of the workpiece attachment mechanism with respect to the central axis of the housing.

Abstract: A cutting tool assembly includes a tool body and a tool holder including a longitudinal axis around which the tool holder is configured to spin. The tool holder includes a central portion connected to the tool body comprising a fastener hole perpendicular with the longitudinal axis and configured to receive a securing fastener, wherein the fastener hole is offset from the longitudinal axis. The tool holder further includes an eccentric drive member connected to the cylindrical portion. The tool holder can optionally further include an end alignment cylinder connected to the eccentric drive member.

Abstract: An adjustable collet holder for use with a lathe is provided. The adjustable collet holder may include a set of hold down screws to hold it in place once adjusted. Adjustment may be achieved by adjusting multiple set screws to change both angular and concentricity orientations of a collet receiver relative to a body of the collet holder.

Abstract: An adjustable collet holder for use with a lathe is provided. The adjustable collet holder may include a set of hold down screws to hold it in place once adjusted. Adjustment may be achieved by adjusting multiple set screws to change both angular and concentricity orientations of a collet receiver relative to a body of the collet holder.

Abstract: An adjustable stroke mechanism for a random orbital machine including a housing having a wall enclosing a cavity, an adjuster ring surrounding the housing and having a first set of gear teeth along a first portion of an inner surface, and a second set of gear teeth along a second portion of the inner surface, a counterweight having gear teeth on an exterior surface disposed within the housing, and a bearing carriage having gear teeth disposed within the housing. At least one counterweight gear that meshes with the gear teeth of the counterweight and the first set of gear teeth of the adjuster ring, and at least one bearing carriage gear that meshes with the gear teeth of the bearing carriage and the second set of gear teeth of the adjuster ring, so that movement of the adjuster ring causes movement of both the counterweight and the bearing carriage.

Abstract: A chuck for a machine tool having a rotation spindle with a main axis of rotation. The chuck comprises a base plate, a first rotatable plate eccentrically mounted on the base plate, a second rotatable plate eccentrically mounted on the first rotatable plate, balancing means for aligning a principal axis of inertia of the chuck with the main axis of rotation and a holding mechanism. The chuck is provided with an actuating mechanism for angularly displacing the first rotatable plate around a first rotation axis over a first angle of rotation and/or the second rotatable plate around a second rotation axis over a second angle of rotation such that the position of the object with respect to the main axis of rotation can be altered.

Abstract: Fastening system for a machine element (41), in particular for an elongate machine element (41), in particular for a toothed rack or a linear guide, for fastening in an abutment (45), in particular a machine bed or a flange, comprising: an eccentric bolt (1) which comprises a pin section (5) to be received in a receiving opening (55) of an abutment (45) and comprises a joining section (7), wherein the joining section is arranged in an eccentric manner in relation to the pin section (5), and an eccentric sleeve (3) to be slid onto the joining section (7).

Abstract: The invention relates to a cutting tool apparatus comprising a tool head rotatingly drivable about an axis of rotation, which tool head has a tool slide adjustable along an adjustment axis and an electrical measuring device for detecting an adjustment path of the tool slide, and comprising an external display device which is mechanically and electrically releasably connectable to the tool head and has a display unit for displaying the adjustment path of the tool slide. In order to further develop the cutting tool apparatus such that its handling is simplified, it is proposed according to the invention that the display device is mechanically securable on the stationary tool head in order to set the tool slide and is automatically releasable from the tool head if a predeterminable rotational acceleration of the tool head is exceeded.

Abstract: Methods for making ophthalmic lenses are generally discussed herein with particular discussions extended to plastic injection molded ophthalmic lens molds that are machined or lens buttons located on the injection molds that are machined. The machine process can include setting a lens axis of the ophthalmic lens and machining a ballast that is aligned to a major axis of a toric zone.

Abstract: A hand operated power tool comprising a housing with a motor and a working element performing an actuating movement if the tool is actuated. The motor is adapted to actuate a tool shaft in order to make it perform a rotational movement. A carrier element is functionally located between the tool shaft actuated by the motor and the working element for translating the rotational movement of the tool shaft into the actuating movement of the working element. In order to provide for a power tool, which allows perfect working of a workpiece with different types of actuating movements and/or working elements, it is suggested that the working element and the carrier element make part of a functional unit constituting a unit separate of the rest of the tool, wherein the functional unit is detachably fixed to the rest of the tool, in particular to the tool shaft.

Abstract: A chuck for a power tool has a central receptacle, arranged in the body of the chuck, having a locating opening for axially inserting a shank-type tool. A reducing sleeve is arranged at least partly in the central receptacle, and a clamping device is provided for at least locally reducing the cross section of the central receptacle. A fixing device is provided which specifies a defined arrangement of the reducing sleeve in relation to the locating opening both with the chuck clamped and with the chuck unclamped.

Abstract: A machine tool includes a main spindle (10) which holds a workpiece (200, object to be machined) and is rotatable about the shaft center (C1), a main spindle motor (20, main spindle driver) which rotates the main spindle (10), a rotary guide bush (30, eccentric guide bush) which supports the workpiece (200) projecting from a leading end of the main spindle (10) to be rotatable in a state of being eccentric relative to the shaft center (C1) by a length E, a guide bush servomotor (40, guide bush driver) which rotates the rotary guide bush (30) about the shaft center (C1) in synchronization with the main spindle (10), and a controller (50) which controls the rotation and driving of the guide bush servomotor (40), so as to selectively switch between the rotation state and the stop state of the rotation.

Abstract: A boring and facing head, rotatively driven by the mandrel of a machine tool, with a turning tool mounted on a mounting slide, which may be controllably driven transversely of the axis (X) of the head body by a threaded shaft (12) operatively connected to a cylinder body (11), integral with a mandrel (4) and rotatably housing a ring gear (17), operatively connected to a gear wheel (19), driven by a controllable motor (8) and wherein the ring gear (17) comprises a circumferential tooth arrangement engaging with a gear wheel (52), integral with the driving shaft (12).

Abstract: A chuck (1) for angular offset woodturning including a first member (2) adapted to be secured to a lathe, and a second member (3) adapted to support a work piece and secured to the first member in such that the second member is oriented with respect to the first member between at least two configurations. The first member having a first axis (4) coaxial with an axis of rotation of the lathe and the second member having a second axis (5), and in one of the configurations the second axis is coaxial with the first axis, and in the other configuration the second axis is angularly offset. The chuck further includes a releasable fastening member (12) incorporating alignment members allowing the second member to be secured in one of the two configurations and that in the other configuration the second axis lies relative to said first axis at one of a number of predetermined angular offsets.

Abstract: A machining unit that is supported on a machine tool and machines a workpiece by a revolving tool with a main spindle section being driven and rotated includes an eccentric rotational section, a tool holder, a tool revolution-radius changing mechanism, and a cutting-edge-orientation correcting mechanism. The eccentric rotational section is disposed on the main spindle section, and is rotatable about an eccentric axis that is located eccentrically at any distance in a radial direction of the main spindle section from a rotation center of the main spindle section. The tool holder is disposed on the eccentric rotational section, and supports the tool. The tool revolution-radius changing mechanism moves the tool in the radial direction, and changes the radius of the revolution of the tool by rotating the eccentric rotational section about the eccentric axis.

Abstract: An eccentric collet chuck comprising: a clamp hexagons nut and a body shank having inner conical surface axis eccentric with outer body shank surface axis and rotate able within the stationary tool holder mounting socket, the eccentric collet chuck is design for easy adjustment of concentricity and misalignment between spindle axis of a lathe and turret tool holder axis.

Abstract: A clamping chuck for machine tools comprising a chuck body and a plurality of clamping jaws which can be displaced together radially by means of a drive comprising key rods is disclosed. An actuating mechanism comprising a releasing bolt is rotatably positioned in the chuck body, and a releasing key can be coupled to the releasing bolt, in order to displace the key rod between an upper working position and a lower jaw changing position. The key rod comprises locking means which enable the releasing bolt to rotate out of the rotary position corresponding to the lower jaw changing position of the key rod, into the rotary position corresponding to the upper working position of the key rod, when the toothing of the coupling yoke is engaged with the counter-toothing of an associated clamping jaw.

Abstract: A device and a method are disclosed for centrally tightening rotatingly drivable parts. The device comprises at least three units for clamping and adjusting a part, wherein at least two of the units comprise an actuator allowing controlled adjustment in radial direction according to a control value. A measuring device is provided to detect deviations of the part from concentricity with respect to a rotary drive axis. A computer is used for controlling the actuators to effect concentricity of the part, the computer being responsive to deviations from concentricity detected by said measuring device.

Abstract: A device for holding an essentially cylindrical work piece (22), in particular a jewelry ring, for machining with a laser beam (L) has at least one chuck (20) that is supported so that it is able to rotate around a rotation axis (18) and that is provided for centrally holding the work piece (22) by means of first clamping elements (30), which automatically fix the work piece (22) in position through the exertion of a spring force.

Abstract: An improved aiming tube pivot assembly for use in a sighting and/or aiming apparatus which comprises an aiming tube axially mounted within an outer tube (or housing). A support ring supports the aiming tube within the outer tube in a gimbal-like arrangement by means of ball bearings and set screws. The ball bearings are secured intermediate the aiming tube and the support ring via apertures in the outer tube. The set screws are threadedly mounted in the support ring and engage the outer surface of the outer tube. A movable cover tube can be mounted on the outer tube and substantially encloses the end of the outer tube and the support ring.

Abstract: A method of alignably supporting an eccentric work piece for rotary movements uses a work piece holder that supports the work piece in alignment during rotary operations. A plurality of cooperating aligning members mounted along the rotary axis of a rotary unit, provides pivoting movements relative to the rotary axis while bearing the work piece. These pivoting movements of the aligning members enable the work piece to be aligned during rotary operations.

Abstract: A sleeve is provided with a clamp for removably clamping the sleeve on a mandrel. A rigid ring is mounted inside of the sleeve at each end of the sleeve. Each ring has a generally cylindrical inside surface which includes a curved contact portion which extends for less than 180 degrees and which is engageable with the outside surface of the mandrel. A curved clamp arm is pivotally secured at one end thereof to each ring. An eccentric shaft extends through an opening in the other end of the clamp arm. Rotation of the eccentric shaft moves the clamp arm toward the contact portion of the ring so that the mandrel can be clamped between the clamp arm and the contact portion.

Abstract: For an orbit boring to be performed by a tool (10) in an orbital motion along an orbit (A), a permissible range of an acceleration (a) of the orbital motion is provided to meet a criterion of a machining precision of the orbit boring, and the acceleration (a) is controlled to be suppressed within the permissible range.

Abstract: In order to improve a machine tool for the turning of workpieces with eccentric sections, comprising a tool support, a workpiece spindle which comprises a workpiece chuck, in which the workpiece can be clamped with a variably adjustable eccentricity, wherein the workpiece chuck has a chuck housing, a collet actuation and a collet support arranged in the chuck housing and having a collet held therein, the collet being adapted to be brought into concentric or eccentric adjustable positions relative to the spindle axis, in such a manner that the adjustment of the collet support relative to the chuck housing can be brought about more simply it is suggested that an adjusting element be provided on the machine tool which is movable towards the workpiece chuck for the adjustment or the respective adjustable position of the collet and may be brought into operative connection with the collet support and that in this operative connection the relative movement between the collet support and the chuck housing for alterin

Abstract: An improved chuck for supporting elongated work pieces having conical end portions, such as single crystal ingots used to fabricate semiconductor wafers, while such. The chuck is typically used in a lathe for positioning and allowing rotation of the work piece during a grinding procedure that results in optimal work piece diameter. The chuck comprises a ring-shaped base, or socket, having a cavity defining a central axis therethrough and a series of fastener holes for securing the base to a headstock or tailstock of a lathe. The base receives within the cavity a portion of a chuck insert. The chuck insert defines a work piece support surface that is coaxial with the central axis when the chuck insert is disposed in a nominal position within the cavity of the base. The work piece support surface will typically define a continuous, arcuate, convex surface capable of supporting work pieces having conical end portions of varying diameters.

Abstract: In order to improve a machine tool for the turning of workpieces with eccentric sections, comprising a tool support, a workpiece spindle which comprises a workpiece chuck, in which the workpiece can be clamped with a variably adjustable eccentricity, wherein the workpiece chuck has a chuck housing, a collet actuation and a collet support arranged in the chuck housing and having a collet held therein, the collet being adapted to be brought into concentric or eccentric adjustable positions relative to the spindle axis, in such a manner that the adjustment of the collet support relative to the chuck housing can be brought about more simply it is suggested that an adjusting element be provided on the machine tool which is movable towards the workpiece chuck for the adjustment or the respective adjustable position of the collet and may be brought into operative connection with the collet support and that in this operative connection the relative movement between the collet support and the chuck housing for alterin

Abstract: For correcting eccentricity of a tool chucked in a first part of an at least two-part toolholder, which first part is detachably connected via clamping means to a second part of the toolholder, which is clamped in a machine tool and rotates about an axis of rotation, setting means are provided by means of which the first part of the toolholder is displaceable relative to the second part. Radial eccentricity of the tool can thereby be corrected. Furthermore, between the first and second parts of the toolholder, two rings are disposed coaxially with, and rotatingly about, the axis of rotation. These rings have annular surfaces, one of which is inclined relative to the other at a certain angle. By mutual rotation of the two rings, the first part of the toolholder can be inclined relative to the second part, whereby an angular error of the tool can also be corrected.

Abstract: A chuck spindle apparatus comprises a chuck spindle mounted for rotation about a central rotational axis, a chuck main body integrally connected to a forward end of the chuck spindle for rotation therewith, and an indexing device. The chuck main body has a chuck portion for bringing any one of a series of fabrication centers of a workpiece into coincidence with the central rotational axis to thereby chuck the workpiece. The indexing device is disposed within the chuck main body for moving the chuck portion of the chuck main body to bring another one of the fabrication centers of the workpiece into coincidence with the central rotational axis while the workpiece is chucked by the chuck portion of the chuck main body.

Abstract: A tool holder for machine tools which provides for both angular and radial alignment of the tool with respect to the working axis of the machine. A tool chuck is part of a ball and socket unit, with the ball being pivotable within the socket for angular alignment of the tool chuck and tool carried therein. The base of the socket member is movably carried within a cup-shaped housing of a base member which allows for adjustment in the vertical plane and radial alignment.

Abstract: A tooling apparatus and method for machining a blank having a first surface portion with a first spin center and a second surface portion with a second spin center offset from the first spin center. The improved tooling apparatus includes a turning fixture connectable to a rotatable spindle in one of a first position and a second position. The first spin center of the blank aligns with the axis of rotation of the spindle when the turning fixture is in its first position and the second spin center of the blank aligns with the axis of rotation when the turning fixture is in its second position. In the preferred embodiment, the rotatable spindle includes a dowel cooperative with first and second bores formed in the turning fixture to position the turning fixture relative to the spindle. The first and second bores are separated a distance equal to the distance between the first spin center and the second spin center of the blank.

Abstract: A chuck body has an internal cam unit eccentrically mounted within antifriction bearings, and the cam unit includes a workpiece gripper. A radial pin extends through the chuck body into a peripheral slot of the cam unit. When rotating in a first rotary direction, the chuck body and cam unit rotate in unison and a first workpiece diameter may be machined. When the rotation of the chuck body is reversed, inertial forces acting on the cam unit prevent immediate reversal of the cam unit rotation, and the pin moves through the peripheral slot, contacting the opposite end and driving the cam unit in reverse rotation; this relative motion between the chuck body and cam unit causes the workpiece to become offset, displacing the first workpiece axis from the chuck body axis of rotation. Consequently, as the reverse rotation is continued, a second workpiece diameter may be is machined about the chuck axis of rotation; the second diameter will be eccentric to the first diameter.

Abstract: In known tool holders only a single screw is used to compensate for axiality faults which exist. It is true that this is a simple construction, but it is not adequate for sensitive compensation of axiality faults requiring attention, particularly in fine drilling. According to the invention this is achieved in the case of the invention by using a tangential tension screw 73 to move towards one another the two sectors 78, 79 of a compensator ring 13, so that the adapter 14 can be sensitively moved into a position in which the geometrical longitudinal axis 17 of the tool 93 becomes coaxial to the spindle axis.

Abstract: A holding device for cutting a toric lens includes a chuck member which holds the lens workpiece, with a rotation and guide assembly provided such that an axis of the chuck member moves along a line perpendicular to the axis of rotation. The chuck member is held by a chuck support member, and the chuck support member includes guide ends which move along an inner periphery of a guide hole of a guide member. The guide hole has a center axis which is eccentric with respect to a rotation axis in a direction orthogonal to the rotation axis, such that as the guide ends of the chuck support member move along the inner periphery of the guide hole, the chuck member rotates while the chuck axis moves along a line which is orthogonal to the rotation axis.

Abstract: Device for producing a drilled hole with an undercut in a facing panel, consisting of a drilling machine and a drilling tool for forming the drilled hole connected to the drilling machine via an adapter for transferring torque; and a holding device of a supporting stand having a swivel bearing for holding the drilling machine so that it can swivel with the drilling tool attached to it. To extend the service life of the drilling tool the adapter consists of a drive part connected to the drilling machine so as to transfer torque and a tool holder connectable with the drive part and a device for releasably securing the tool holder to the drive part so that the center line of the tool holder is inclined relative to the center line of the drive part, which is aligned with the drive axis of the drilling machine, so that only a portion of the circumference of the drilling tool engages the panel during formation of the drilled hole.

Abstract: A wheelhead assembly for use upon a vertical rotary power drive shaft of a potter's wheel includes a top plate, a drive shaft coupler, and a locking arrangement for releasably securing and adjustably relocating the top plate relative to the drive shaft coupler. The top plate has a planar upper surface for supporting a mass of clay to be molded into a composite article of pottery. The drive shaft coupler has a fixed axis of rotation and is capable of supporting the top plate upon the rotary drive shaft of the potter's wheel for rotation with the coupler about its axis of rotation.

Abstract: A holding device on a turning machine for a workpiece, which is held by a chuck serving as a clamping device and being arranged at a receiving disk, is equipped with separate correcting elements disposed at the clamping device. The correcting elements may be controlled individually by electrical, pneumatic or hydraulic means. The correcting elements act on the clamping device in order to adjust the workpiece.It is thereby possible to adjust the clamping device itself in a defined manner, so that the clamped workpiece may be adjusted easily.

Abstract: An adjustable rotational coupler includes a housing having an interior bore concentric with a central axis of the housing. The housing is mountable to a mounting member. Threaded adjusters can be used to adjust the housing with respect to the mounting member such that an attitude of a plane perpendicular to the central axis of the housing is adjustable with respect to an attitude of a plane perpendicular to a central axis of the mounting member. A rotatable inner race is adjustably disposed in the interior bore of the housing such that a face plate is mountable to the inner race. Threaded adjusters can be used to adjust the inner race with respect to the housing such that a central axis of the face plate is transversely adjustable with respect to the central axis of the housing.

Abstract: A mechanism for clamping a tool (e.g. a probe) and a shank together comprises a clamping pin (144), which bears against an annular lip (142) in the rear face of the probe. A shaft (148) of the pin (144) extends into the shank (150), and two diametrically opposite, radially extending clamping bolts (160) supported by the shank (150), bears against a frusto-conical clamping surface (158). The action of the bolts (160) on the surfaces (158) urges the probe and shank together. The probe and shank are adjusted laterally relative to each other by four adjusting bolts (166) supported in the annular lip (142) which bear against a flange (152). The flange (152) is provided on the shank (150) and extends into the probe (140).

Abstract: Mechanical fine adjust boring head including an adjustment drive train through a worm wheel drive of an eccentric cam orbiting a drive key engaging a slide to effect linear radial adjustment. Anti-friction bearings for the cam and orbital drive connection between the cam and drive key provide for smooth nonbinding adjustment.

Abstract: A chuck has a chuck body generally centered on and rotatable about a rotation axis, a head displaceable on the chuck body generally perpendicular to the rotation axis, and three jaws angularly generally equispaced on the head about a clamp axis offset from and substantially parallel to the rotation axis. All of these jaws are displaceable on the head generally radially of the clamp axis. An actuator is connected to the jaws for synchronously displacing same generally radially toward and away from the clamp axis. The actuator includes an actuator member displaceable axially in the head and provided with respective actuating surfaces inclined to the clamp axis and engageable with the jaws. Two of the jaws are pivotal about respective jaw axes parallel to the axes and the other jaw is displaceable in a plane substantially including the clamp and rotation axes.

Abstract: Apparatus for use in cutting a workpiece on different centers. The workpiece is mounted in a chuck on a spindle top. The spindle top is mounted on the upper end of a rotatable, vertical spindle shaft adjacent to a cutting tool in different positions spaced apart laterally relative to the spindle shaft axis. When the spindle shaft is rotated with the spindle top in one position, the tool will cut the workpiece on one center. In another position of the spindle top, the tool will cut on a different center.

Abstract: Lathes usually have only two axes of movement for the tool, namely the directions of the displacement of the saddle and cross rest. Since power-driven tools are increasingly being used, especially in NC lathes, in which radial and axial slotting is performed on the workpiece with end mills, for example, there is a need, for example, to vary the width of the slot by slightly shifting the tool in a third direction perpendicular to the first two directions of movement. Precisely in the case of slotting, no continuous adjustment is necessary, as it would be very costly to achieve mechanically. Instead it is sufficient to be able to reach two or three fixedly specified, changeable positions. This can be achieved by an arcuate movement of the tool which will also contain components of the desired third direction of movement, and this can be achieved mechanically either by rotating a part of the tool head or by an eccentrically configured tool socket.

Abstract: For correcting axial errors of a tool, the latter is held by a two-part tool holder, whose two parts are reciprocally displaceable by a setscrew along their engaging interfaces at right angles to the axis. For this purpose, the locking screws of a flange connection are correspondingly loosened. The axial correction can be simply and rapidly performed, in that the setscrew is provided on a setting ring rotatable about the axis.

Abstract: The chuck clamps a workpiece on a clamping axis eccentric to the rotation axis of the chuck. The spacing between the rotation axis and the clamping axis parallel to it can be varied along a radial axis spacing line going through the rotation axis. One jaw has a clamping surface which intersects the axis spacing plane going through the rotation axis on the axis spacing line perpendicular to the axis spacing line and is adjustable along the axis spacing line. The other jaws opposite this one jaw are adjustably mounted in guides inclined symmetrically about the axis spacing plane and are jointly centrally drivable. The first jaw and both other jaws are adjustable independently of each other. Each of the other jaws has a planar clamping surface perpendicular to its guide direction. The first jaw which does not participate in the clamping process exists to change the axis spacing.

Abstract: The chuck has a mounting body with an associated chuck assembly and a pivot device. For clamping of a workpiece at least one chucking jaw can adjustably be swung away from its chuck assembly, and the clamped workpiece, together with the chucking jaws can be turned about a pivot axis which extends perpendicularly with respect to the axis of rotation of the operational spindle of the lathe and with respect to the axes of operation of the workpiece, into pivot positions determined by the directions of the axes of operation. For workpieces with a pair of axes of operation, which are disposed at a distance with respect to one another, the mounting body is comprised of a base member and a turning member. The turning member is journaled for rotation at the base member so as to be able to revolve about a turning axis which extends parallel to the axis of rotation of the operational spindle and which intersects the pivot axis at predetermined distance.

Abstract: Coarse radially adjustable tool holder employing eccentric adjustment ring combined with linear guide means confining tool point to linear adjustment path within fine adjustment eccentric bushing such as provided by "Briney Precision Adjustment Tool".

Abstract: A tool holder for cutting tools used on metal cutting lathes which allows for easy adjustment of the tool position with respect to the work to be cut. Provides a simple and rapid means of tool change and adjustment while eliminating the need for extra tools for making the adjustment. Utilizes a manually adjustable collet for positioning and a simple, single lever control for clamping and releasing the tool.

Abstract: The power chuck is particularly intended for holding crankshafts. The chuck has a base, a head, and clamping jaws. The head is radially guided with respect to a clamping axis which extends parallel to an axis of rotation. The clamping jaws are connected to a drive piston by way of axially movable wedge members which can be axially displaced in the base. The chuck also has a holding body which is reciprocatingly guided at the base. When considered in transverse direction with respect to its direction of displacement, the holding body has a width which is smaller than the diameter of the base. Parallel thereto and on both sides of the holding body are arranged movably guided counterbalancing elements, and they are each connected by way of a gear wheel in a countercurrent manner to the body. Several clamping jaws are separated into an inner part and an outer part, of which the inner part is guided in the holding body, and the outer part with the wedge member connected to it is guided in the base.

Abstract: The present invention is a device for adjusting eccentricity of the design axis of rotation of a rotary tool (12) with regard to the axis of rotation of a drive spindle (10). The device includes male and female members (22, 24), one matable to each of the spindle (10) and the tool (12). The male and female members (22, 24) are adjustable relative to each other to vary the eccentricity and to maintain the tool (12) wherein it is not canted relative to the axis of rotation of the spindle (10).