Abstract: A clamping device for clamping a workpiece to a machine spindle includes at least one clamping bush which extends around a central axis and has at least one clamping surface for the workpiece and at least one clamping body. The clamping bush on a side remote from the clamping surface at least one support surface which extends about the central axis along a helical line. On a side facing, the clamping bush comprises at least one support surface which extends about the central axis along a helical line with a predefined pitch and is inclined at an angle of inclination to a direction axial to the central axis. The clamping body includes a hydraulic chamber in the interior of the clamping body. The clamping device also includes a displacement element, and at least one pressure generator. A clamping force is generatable between the clamping bush and workpiece.

Abstract: A clamping device for clamping a workpiece to a machine spindle includes at least one clamping bush which extends around a central axis and has at least one clamping surface for the workpiece and at least one clamping body. The clamping bush on a side remote from the clamping surface at least one support surface which extends about the central axis along a helical line. On a side facing, the clamping bush comprises at least one support surface which extends about the central axis along a helical line with a predefined pitch and is inclined at an angle of inclination to a direction axial to the central axis. The clamping body includes a hydraulic chamber in the interior of the clamping body. The clamping device also includes a displacement element, and at least one pressure generator. A clamping force is generatable between the clamping bush and workpiece.

Abstract: A device for supplying coolant and/or lubricant to a rotating/rotatable tool includes a flow duct with an interior space through which the coolant and/or lubricant can flow, and which can be coupled to a tool's flow duct and a seal between the two flow ducts. The seal can be made of a material that is of a higher elasticity than the material of the device's flow duct and the tool's flow duct. As such, the seal also has a high durability for the coolant and/or lubricant. The seal can be configured to bear against at least one surface of the device's flow duct and against at least one surface of the tool to prevent leakage of the coolant and/or lubricant as the coolant and/or lubricant passes from the device's flow duct into the tool's flow duct. Further, a device is disclosed for coupling the tool to the device that supplies the coolant and/or lubricant.

Abstract: A thread-cutting apparatus with reversal of the direction of rotation with a sun-and-planet gear with an axially displaceable reversing device for reversing the direction of rotation of a drill, held in the grip of a spindle, which can be pulled out preferably against a length equalization spring after a given drilling head depth has been reached, especially reversing chucks with pressure equalization pipelines, which discharge into an equalization chamber, sealed by a movable wall from the outside air, wherein the reversing device is actuated by an external driving element, which can be actuated by a reversing signal generated by an actuator.

Abstract: A thread cutter, particularly a reversing chuck with a spindle which can be pulled out, has pressure equalizing pipelines which discharge into an equalizing chamber which is sealed from the outside air by a movable wall.

Abstract: A quick-change insert, particularly for hard alloy taps, has a seat for a square end section of the tap forming the rotational connection and a pull-out holding device. In the region of the square end section, at least one indentation is provided for the positive engagement of a locking pin, which is under the tension of a spring, mounted in the quick-change insert with limited longitudinal mobility and, in use, is blocked by an overlapping collar of the chuck body.

Abstract: A thread-cutting chuck for CNC machine technology of rigid tapping, with a clamping means held in a chuck shaft, particularly a collet chuck, for the tap, an accommodating part, which is held in the chuck shaft without clearance in the direction of rotation and, in the axial direction in the tension and compression directions, has a slight axial clearance cushioned by elastomeric connections disposed between the clamping means and the shaft of the chuck.

Abstract: A chuck comprising a chuck body and monitoring electronics for detecting chuck faults fitted within the chuck body. A wireless transmission means is provided on the chuck body for transmitting signals from the monitoring electronics. The chuck has a dynamo having a housing fixed in the chuck body and a rotatable rotor having a mass for rotating relative to the housing when the chuck rotates due to an inertial moment of the mass to produce electric energy to power the monitoring electronics. Optionally provided is an electric energy storage means for storing energy from the dynamo and powering the monitoring electronics to provide for constant operation of the monitoring electronics.