Abstract: A steady rest for clamping of rod-shaped workpieces, the steady rest including three holding elements, including two outer holding elements adapted to be swivelled about a pin mounted in a housing and a middle holding element adapted to be adjusted axially, and in which coolant or lubricant can be carried to a workpiece by means of ducts in the housing and the middle holding element. The ducts provided in the housing and in the middle holding element, being connected to a cavity and the ducts being connected together by a deformable flexible high-pressure hose. The ducts being connected together by means of the elastically deformable element.

Abstract: In a power-operated chuck (1) with radially adjustable clamping jaws (5) that are attached so as to swivel and be axially adjustable on an articulation lever arranged in a chuck body (2), each of the articulation levers (10) is pivotably mounted on an articulation pin (21) that passes through the articulation levers (10) and the articulation pins (21) are supported in the chuck body (2) so as to prevent rotation and are guided to permit limited axial movement. This embodiment makes it possible not only to carry out precise clampings of workpieces (W) over a long period with a consistently high level of rigidity, but also to avoid wear to a large extent. As a result, workpieces can always be clamped precisely whilst a high level of repeat accuracy is provided.

Abstract: A diaphragm chuck (1) with clamping jaws (3) inserted in its chuck body (2) in a driven connection with a diaphragm (4) that can be deformed by an axially adjustable actuator (5) and is provided with clamping jaws (3) with contact pieces (22), in which counterweights (8) assigned to the clamping jaws (3) are inserted into recesses (7) of the chuck body (2) and the clamping jaws (3) can be clamped against the diaphragm (4) by means of quick-clamping devices (31) engaging in the contact pieces. The contact pieces (22) are each provided with an intermediate element (101) in the area between the clamping jaws (3) and the quick-clamping devices (31) by means of which the flexural moments and/or rotational torques created by the quick-clamping device (31) can be eliminated and it is possible to transmit exclusively axially vectored tensile forces onto the clamping jaws (3).

Abstract: A diaphragm chuck assembly having clamping jaws disposed in a chuck body and in driven connection with a diaphragm deformable by an axially adjustable actuator, the clamping jaws having contact pieces, in which counterweights are disposed in recesses of the chuck body and the clamping jaws are clamped against the diaphragm by means of quick-clamping devices engaging in the contact pieces, the contact pieces being arranged in the diaphragm and in the counterweights with radial play. The clamping jaws are supported against a first surface extending axially in parallel to the chuck body in the clamping position and against a second reference surface extending at right angles to the first reference surface and into the diaphragm. The clamping jaws can be changed in a short time and the clamping jaws can be replaced without having to be reground.

Abstract: In a steady rest (1) with three holding elements (5, 6, 7), of which the two outer holding elements (6, 7) can be swivelled about articulated pins (8, 9) mounted in a housing (2) and the middle holding element (5) can be adjusted in a straight line, with one chip protection cap (11, 12) each provided with outlet ducts attached to one or both outer holding elements (6, 7) and with the possibility of supplying cooling or rinsing agent in a controlled fashion via ducts (13, 15) worked into the holding elements (6, 7) for application to the workpiece (10), each of the ducts (13, 15) provided in the outer holding elements (6, 7) is directly connected to a duct (27) running in the housing (2) of the steady rest (1) via kidney-shaped openings (21, 22) running concentrically to the articulated pins (8, 9).

Abstract: In a power-operated chuck (1) with clamping jaws (3) that are guided so they can move radially within a chuck body (2) and are in a drivable connection via intermediate elements with a clamping piston (4) upon which a hydraulic fluid can act in one or both directions and which is inserted in the chuck body (2) in such a way that it can move axially, a pressure sensor (41) installed in the chuck body (2) is provided in order to monitor the hydraulic fluid pressure existing in the pressure chambers (7 and 8) assigned to the clamping piston (4), the pressure sensor (41) being connected to one or both pressure chambers (7, 8) via hydraulic fluid channels (42, 43). Furthermore, the pressure sensor (41) has a receiver assigned to it which is connected to a unit (45) for evaluating the signals received from the pressure sensor (41).

Abstract: A device in the form of a self-centering steady rest for clamping or holding workpieces on a machine tool is provided. Three holding members are supported in a separate, intermediate member that is disposed in a housing and is displaceable therein, toward and away from a workpiece, by means of a piston. Formed in the walls of the housing are control cams by means of which the outer holding members are pivotably guided via adjustment movements of the intermediate member.

Abstract: In a chuck (1) with moveable base jaws (11) inserted in radial grooves (3) in a chuck body (2) with each base jaw (11) having a releasable top jaw (21) attached to it, a joining piece (12) protruding towards the top jaw (21) is formed onto each base jaw (11) and engages in an accommodation opening (22) in the top jaw (21). Furthermore, the top jaws (21) can be clamped onto the base jaws by means of quick clamping devices (31) arranged in the top jaws (21) and the joining pieces (12). This embodiment means that the top jaws (21) of the chuck (1) can be replaced very quickly and in a simple operation, whilst a secure attachment of the top jaws (21) onto the base jaws (11) is guaranteed at all times.

Abstract: In a diaphragm chuck (3) with clamping jaws (3) which are in a drivable connection with a deformable diaphragm (4) by means of jaw carriers (6) and in which counterweights (8) allocated to the clamping jaws (3) are inserted in the chuck body (2), the clamping jaws (3) are provided with axially aligned joining pieces (23) which are held in the counterweights (8). The clamping jaws (3) can be clamped together with the jaw carriers (4) and the diaphragm as well as with the counterweights (8) by means of quick clamping devices (31) which engage in the joining pieces (23).This embodiment achieves a situation in which the clamping jaws (3) can be changed rapidly and in a straightforward procedure by releasing the quick clamping devices (31) by means of a tool which can be inserted radially from the outside into the chuck body (2).

Abstract: A chuck having jaws that are displaceable in radial guideways and can be operated by wedge bars. The wedge bars can be displaced beyond a working space to such an extent that the teeth thereof disengage from the teeth of the pertaining jaw. Each of the wedge bars has disposed therein a pin that projects into the guideways and that has an inclined surface that cooperates with the pertaining jaw; the pin can be displaced against the force of a spring. During exchange of the jaws, the wedge bars can be locked in an end position by the pins.

Abstract: A chuck, each of the clamping jaws of which is adapted to be driven by a wedge bar that can be displaced in the chuck body beyond the clamping stroke to such an extent that the clamping jaws can be removed radially. A locking mechanism in the form of a rotatably held adjusting pin is provided for each clamping jaw. Each wedge bar, on that side that faces the adjusting pin, is provided with a slot-like recess for receiving the adjusting pin in an operating range of the chuck. The slot-like recess extends in the longitudinal direction of the wedge bar. In the operating position of the chuck, the adjusting pin is adapted to be inserted into the slot-like recess in an automatic manner.