Abstract: The invention relates to a spindle, in particular a machine spindle, which is used to machine a work piece by means of a tool which is applied to the spindle, comprising an axially displaceable tension rod (30) which is used to secure the tool to the spindle, and a drive shaft (4) which is driven, in particular, by the motor of the spindle. The drive shaft of the spindle can be connected via a coupling device either to the tension rod (30) for axially displacing the tension rod (30) in order to change tools or to the tool in order to machine the work piece. The tension rod (30) can be axially displaced in a work shaft (1) which is embodied as a hollow shaft. The work shaft (1) can be arrested in relation to the housing (2) of the spindle in a first coupling position in order to axially displace the tension rod (30) within the work shaft (1) by the drive shaft (4). The angle position of the work shaft (1) and the drive shaft (4) can be freely selected in the first coupling position.

Abstract: The invention relates to a freewheel insert element and a freewheel comprising a freewheel insert element, wherein the freewheel insert element comprises a plurality of clamping bodies (1, 11), each clamping body (1, 11) having an outer contact surface (1a, 11a) for forming a frictional contact with an outer clamping track (3) and an inner contact surface (1b, 11b) for forming a frictional contact with an inner clamping track (4), and a plurality of intermediate elements (2, 2a, 2b) are provided which have a higher elasticity than the clamping bodies (1, 11) and are arranged between adjacent clamping bodies (1, 11).

Abstract: A torsional vibration damper for coupling two machine parts disposed coaxially to each other, in particular for coupling a cylindrical inner surface of a first machine part to a cylindrical outer surface of a second machine part, has a plurality of clamping bodies and a plurality of intermediate elements. The intermediate elements have higher elasticity than the clamping bodies and are disposed between adjoining clamping bodies.

Abstract: A bearing element 7 has rolling bodies 3, having an inner raceway, an outer raceway and adjacent rolling bodies 3 which are arranged rotatably between the inner and the outer raceways via a cage 4 for holding the rolling bodies 3. At least one porous element 6, 13, 16 is provided for accommodating lubricant for the bearing element 7.

Abstract: The invention relates to a freewheel insert element and a freewheel comprising a freewheel insert element, wherein the freewheel insert element comprises a plurality of clamping bodies (1, 11), each clamping body (1, 11) having an outer contact surface (1a, 11a) for forming a frictional contact with an outer clamping track (3) and an inner contact surface (1b, 11b) for forming a frictional contact with an inner clamping track (4), and a plurality of intermediate elements (2, 2a, 2b) are provided which have a higher elasticity than the clamping bodies (1, 11) and are arranged between adjacent clamping bodies (1, 11).

Abstract: The invention relates to a torsional vibration damper (1) and to a spindle having a torsional vibration damper (1). The torsional vibration damper (1) for coupling two machine parts disposed coaxially to each other, in particular for coupling a cylindrical inner surface of a first machine part (5) to a cylindrical outer surface of a second machine part (4), comprises a plurality of clamping bodies (2) and a plurality of intermediate elements (3, 3a, 3b), wherein the intermediate elements (2, 12, 22, 32) have higher elasticity than the clamping bodies (3, 3a, 3b) and are disposed between adjoining clamping bodies (3, 3a, 3b).

Abstract: The invention relates to a bearing element 7 having rolling bodies 3, having an inner raceway, an outer raceway and adjacent rolling bodies 3 which are arranged rotatably between the inner and the outer raceways, in particular having a cage 4 for holding the rolling bodies 3, wherein at least one porous element 6, 13, 16 is provided for accommodating lubricant for the bearing element 7.

Abstract: The invention relates to a free-wheel, particularly a clamping member free-wheel, comprising elements, especially an internal ring (1) and an external ring (2), which can be twisted relative to one another about a common axis, are arranged inside each other, and form a gap (4) inside which clamping elements, particularly clamping members (5), are disposed such that a frictional connection can be established to the facing external surfaces of the elements (1, 3) via clamping surfaces (6, 7) of the clamping members (5). The clamping members (5) are inserted into a clamping member cage (8) in order to be securely positioned. A circumferential band element (9) is provided which has recesses (10) for receiving the clamping members (5).

Abstract: The invention relates to a spindle, in particular a machine spindle, which is used to machine a work piece by means of a tool which is applied to the spindle, comprising an axially displaceable tension rod (30) which is used to secure the tool to the spindle, and a drive shaft (4) which is driven, in particular, by the motor of the spindle. The drive shaft of the spindle can be connected via a coupling device either to the tension rod (30) for axially displacing the tension rod (30) in order to change tools or to the tool in order to machine the work piece. The tension rod (30) can be axially displaced in a work shaft (1) which is embodied as a hollow shaft. The work shaft (1) can be arrested in relation to the housing (2) of the spindle in a first coupling position in order to axially displace the tension rod (30) within the work shaft (1) by the drive shaft (4). The angle position of the work shaft (1) and the drive shaft (4) can be freely selected in the first coupling position.

Abstract: The invention relates to a coupling device for establishing a couplable connection between two rotationally mounted machine parts, particularly a first shaft and a second shaft. To this end, the second shaft comprises a coupling ring that, on the inside, has tensioning bodies, which act against each another in pairs and which are arranged so they surround the shaft.

Abstract: The invention concerns a device (1) for fixing a tool on a shaft (2), comprising a drawbar (3) which can slide axially inside the shaft (2) and which is used to releasably lock tools fixed on the shaft (2), in particular for automatically changing tools in automatic machine-tools. The drawbar (3) is housed in the shaft locked in rotation and has an external thread (4) whereon is urged to be pressed a threaded body (2) having a corresponding internal thread (6). The drawbar (3) is so arranged as to be able to slide in the shaft (2), by rotation of the threaded body (5), to enable change of tools.

Abstract: The invention relates to a coupling device for establishing a couplable connection between two rotationally mounted machine parts, particularly a first shaft and a second shaft. To this end, the second shaft comprises a coupling ring that, on the inside, has tensioning bodies, which act against each another in pairs and which are arranged so they surround the shaft.

Abstract: The invention concerns a device (1) for fixing a tool on a shaft (2), comprising a drawbar (3) which can slide axially inside the shaft (2) and which is used to releasably lock tools fixed on the shaft (2), in particular for automatically changing tools in automatic machine-tools. The drawbar (3) is housed in the shaft locked in rotation and has an external thread (4) whereon is urged to be pressed a threaded body (2) having a corresponding internal thread (6). The drawbar (3) is so arranged as to be able to slide in the shaft (2), by rotation of the threaded body (5), to enable change of tools.

Abstract: The invention relates to a device for supporting a first machine part when a second machine part is subjected to force, the second machine part being mounted on the first machine part or being accommodated therein, in particular device for supporting a shaft (1) having a tension rod (2), which can be displaced in the axial direction, when the tension rod (2) is subjected to force, for example for changing parts of tools mounted on the shaft in automatic processing machines, a first adjustable component being provided for introducing a counterforce into the first machine part for the purpose of supporting the first machine part in a stable position, and a second adjustable component being provided for subjecting the second machine part to force.

Abstract: A process for the continuous chipless separation of identical individual rings from tubular workpieces by using cutting rollers. In order to produce highly-accurate rings, preferably from antifriction bearing steel, the section of the tubular workpiece to be separated is completely encompassed by the longitudinal contour of the cutting rollers and the faces of the rings are produced plane-parallel and vertical relative to the workpiece axis. What is essential is that prior to the cutting process the tubular workpiece is heated to a temperature that substantially lowers the deformation resistances of the material used.

Abstract: Method and apparatus for manufacturing thin wafers from bars, such as in the manufacture of wafers for use as semiconductor substrates, include an arrangement wherein a holder member is fastened to the bar, the bar is sliced to separate a disc-shaped wafer therefrom and wherein prior to completion of the slicing operation, the end face of the bar is leveled to a precisely planar condition. The slicing operation is terminated after the bar is sliced completely through and the holder member is partially, but not completely, sliced through so that a wafer formed by the slicing operation remains connected to the bar by the holder member. The wafer is disconnected from the bar by abrading a portion of the holder member connecting the wafer to the bar.

Abstract: Apparatus for manufacturing thin wafers from bars, such as in the manufacture of wafers for use as semiconductor substrates, include an arrangement wherein a holder member is fastened to the bar, the bar is sliced to separate a disc-shaped wafer therefrom and wherein prior to completion of the slicing operation, the end face of the bar is leveled to a precisely planar condition. The slicing operation is terminated after the bar is sliced completely through and the holder member is partially, but not completely, sliced through so that a wafer formed by the slicing operation remains connected to the bar by the holder member. The wafer is disconnected from the bar by abrading a portion of the holder member connecting the wafer to the bar.

Abstract: Centrifugal chucking apparatus for fixing a member to be rotated to a rotatable driving member includes a cylindrical cage member adapted to be mounted for rotation with the driving member, at least one clamping body movably mounted within an aperture formed in the cage member and which moves into engagement with the member to be rotated during rotation of the driving member under the action of centrifugal force, and at least one lever member associated with the clamping body and mounted for rotation with the driving and cage members. The lever member mutually engages both the clamping body and the cage member and during rotation of the driving member the lever member is urged outwardly under the action of centrifugal force. The lever member is appropriately positioned so that as a result of this outward urging under centrifugal force, the lever member exerts a force against the clamping body which has a direction to increase the force with which the clamping body engages the member to be rotated.

Abstract: A surface grinding method and apparatus wherein workpieces are ground with a ring-shaped grinding wheel having a ring-shaped grinding surface the inner diameter of which is relatively large with respect to the dimensions of the workpieces. The method and apparatus include steps and structure for providing between the workpieces and the ring-shaped grinding wheel a relative movement where the workpieces travel along a substantially cycloidal path with each workpiece having a point at the surface thereof which is ground by the grinding wheel and passes at least twice across the grinding surface between the outside and the inside thereof. To bring about this relative cycloidal movement, the central axis of either of the work-supporting structure or the grinding structure, preferably the work-supporting structure, is displaced around an axis which is parallel to its central axis, while this central axis is simultaneously moved inwardly toward and outwardly away from the axis parallel thereto.