Abstract: A method for rough-turning and finishing a workpiece on a lathe wherein the lathe is provided with a tailstock center which is axially displaceable, a further center on the work spindle as well as axially displaceable front drivers and a chuck so that, for rough-machining, the workpiece is lifted off the work spindle center by means of the front drivers and driven by the chuck whereas, for finish-machining, the workpiece is held between the centers and driven by the front drivers.

Abstract: Automatic turret lathe with a synchronous spindle in the tool turret which is drivable in synchronism with the main spindle and comprises a workpiece chuck means. To enable workpieces to also be worked on the rear side, i.e., on the side on which they were severed from a stock rod, while the next workpiece held in the main spindle is already being machined with the aid of a further tool carrier, a third tool carrier is arranged on the side of the tool turret mounted on a compound slide system facing away from the main spindle.

Abstract: NC automatic turret lathe with a tool turret, in which an auxiliary spindle is rotatably mounted. In order to position this auxiliary spindle with respect to its angle of rotation, an angle of rotation sensor device which controls a drive motor for the auxiliary spindle and an activatable locking device designed in the form of a freewheel are provided for the auxiliary spindle so that it may be positioned, with respect to its angle of rotation, accurately and free from play by reversing the auxiliary spindle drive motor once the locking device has been activated.

Abstract: A steady for holding rod-shaped components 40 of circular cross-section, with three holding-members in a common plane, one holding-member 16 being linearly movable and the other two being pivoted twin arm-levers 12, 14 and arranged to be operated as the holding member 16 is moved linearly, the distances of the members 12, 14 16 from the component center being maintained substantially equal and the drive connection between the linearly movable holding member 16 and the pivoting holding members 12, 14 being through eccentrics 48, 50 automatically rotatable for pivoting the holding members 12, 14 by an adjuster means 52.

Abstract: This invention relates to a tool presetting gauge for adjusting the cutting edge of a tool fitted in a tool holder externally of a machine tool, or for measuring the position of the cutting edge. It comprises a gauge body with a support side and a bore parallel thereto for fixing the tool holder in a setting plane. The gauge body is provided with two surfaces which are parallel to each other and perpendicular to the support side. The distance between these two surfaces is equal to the distance between the support side and the axis of the bore and the setting plane, respectively. By setting the gauge body with one of the parallel surfaces on a table plate and applying the feeler of a dial gauge onto the other one of the two parallel surfaces the dial gauge can be set to zero. While the dial gauge is held stationary the gauge body is placed with its support side on the table plate, and by means of the feeler of the dial gauge it can be found out whether the tool is in the setting plane or must be adjusted.