Abstract: There is shown a tool holder for a hob, which is embodied as a bore having a clamping device provided between a spindle and a counterholder, the clamping device having a centring clamping piece that is engageable in the hob and a receiving mandrel that is engageable in the hob, the receiving mandrel being braced with the centring clamping piece in order to mount the hob, wherein the centring clamping piece has a flange. In order to ensure the best concentric running properties in a stable manner, it is proposed that the centring clamping piece and the receiving mandrel each have a flange, which each mount a radial adjusting drive with at least one adjusting member that is adjustable with respect to the spindle and/or the counterholder in order to center the clamping device.

Abstract: A machine tool and method for machining a workpiece into a finished part in which the workpiece is damped into a machine tool and is machined in a material-removing fashion with a tool that has a geometrically defined cutting edge and is fastened to a multiaxially mobile tool holder of the machine tool. In order to ensure the maximum dimensional and size accuracy in the finished part, it is proposed that the workpiece, after its material-removing machining and in the same clamping set-up used for the latter, is incrementally cold forged in at least some regions with the aid of a forging tool to produce the finished part.

Abstract: There is shown a tool holder for a hob, which is embodied as a bore having a clamping device provided between a spindle and a counterholder, the clamping device having a centring clamping piece that is engageable in the hob and a receiving mandrel that is engageable in the hob, the receiving mandrel being braced with the centring clamping piece in order to mount the hob, wherein the centring clamping piece has a flange. In order to ensure the best concentric running properties in a stable manner, it is proposed that the centring clamping piece and the receiving mandrel each have a flange, which each mount a radial adjusting drive with at least one adjusting member that is adjustable with respect to the spindle and/or the counterholder in order to centre the clamping device.

Abstract: A method for processing an inner face of a housing having an opening, in particular a housing of a driving mechanism, by means of a machine tool, which has a multiaxially movable tool retainer. A tool retained by the tool retainer is introduced through the opening into the housing, which is stationary relative to the machine tool, and the tool is moved along a circular path and in the direction of the housing in order to process the inner face. In order to create advantageous method conditions, the control head of the tool retainer that accommodates the tool is driven in a rotational manner by means of an angle drive on the tool retainer in order to move the tool independently of the axes of motion of the machine tool along a circular path in order to process the inner face.