Abstract: The apparatus according to the invention, for clamping crankshafts in working machines, is addressed to the problem of being able to clamp the workpieces in a defined position, reproducibly and without distortion, even in the case of different rough crankshaft forgings and varying clamping forces. This is made possible by clamping the workpiece not only between centers but also with two additional devices, the crankpins and cheeks of the workpieces being positioned by oppositely acting hydraulic plungers transversely of the long axis of the workpiece, while these two additional clamping devices are housed in a ring which rotates with the workpiece and which is supplied during rotation only through internally present energy accumulating systems.

Abstract: A lathe having a spindle which has a flange for the mounting of a chuck in whose base sliding weights are displaceably mounted in radial grooves and act on the bases of the chuck jaws through rocking reversing pins for the compensation of centrifugal force. To achieve a minimum overhang of the chuck, the lathe is constructed such that the chuck base and the spindle flange are made in one piece, and that the chuck body is fastened releasably on the spindle flange.

Abstract: A machine bed for machine tools having two guides lying in separate planes each having two guide ways, namely an approximately horizontal main guide and an additional guide at an angle thereto, in which at least the guide ways of the main guide lie on intersecting tangents or parallels thereof, of a circle whose center is the same as the workpiece and/or tool center of rotation of the machine.

Abstract: A jaw for chucking devices, especially multiple-jaw chucks of machine tools, for example, for chucking workpieces having surfaces curved in only one direction, especially workpieces having round chucking surfaces. The contact face of the jaw is provided on a chucking element consisting of hard but flexible material to which the chucking force is applied in at least one line parallel to the curved surface of the workpiece.

Abstract: A crankshaft turning machine operating on the dual cam principle, in which the gyro cutterhead (51) is carried in an internal eccentric cam (11) and the latter in an external eccentric cam (15) rotatable in a housing, both cams being adjustable as to their mutual position. For purposes of avoiding the creation of flattened portions at the crankpins to be machined at the transition from the plunge cut to the circular feed, the design is such that the transition from the plunge cut turning process to the circular feed turning process takes place without any feed stop phase.

Abstract: An external milling machine for the machining of planar, shallowly curved, or circular workpiece contours, consisting of a gyro cutterhead which is rotatably mounted in an internal cam, which in turn is rotatably mounted in an external cam, which in turn again is rotatably mounted in a casing, both of the cams being variable in their position with respect to one another. To enable the machining to be done while the workpiece remains stationary, and to make it as independent as possible of the radius of curvature of the contour being machined, that is, to guide the workpiece [sic] along a course equidistant from the contour being machined, the gyro apparatus is constructed such that the external cam and/or the internal cam are drivable, and such that the casing together with the internal and external cams is displaceable along at least a straight line perpendicular to the workpiece axis.

Abstract: The invention relates to a machine for machining crankshafts, which operates according to the gyrocutter principle, and which has two machining units and one corresponding clamping device each. In order to be able to provide optimum clamping even for unstable workpieces, such as crankshafts, for example, in which the main journal and crankpin spacing is small, and to catch the chips that are formed and evacuate them easily, the two clamping devices support the crankshaft tightly at the same main journal while two crankpins are being machined.

Abstract: The invention relates to an overload protection device for a machine tool, in which a carriage carried on the machine bed is displaceable, between the tailstock and the headstock by a lead screw [driven] by a drive motor and a feed gearing, and in which the lead screw nut is joined to the carriage by at least one joining bolt. To permit a very quick restoration of the machine to service after a collision between the carriage and a component present in its path of movement, while the predetermined dimensional relationship is restored without additional readjustment, the overload protection device is constructed such that the joining bolt has a break-away section in the area of the junction between the carriage and the lead screw nut.

Abstract: The invention relates to a power-driven steady rest for lathes, especially crankshaft turning machines, having a drive gear encompassing the workpiece, in which there is disposed a chuck for holding the workpiece and which is held on both sides adjacent the outer circumference by a bearing in a supporting plate fastened to the machine bed. The drive gear bearing is improved with regard to load bearing capacity and rotatory speed capability by the fact that the bearing consists of individual roller bearings, each of which is formed of a roller and a roller holder fastened to the supporting plate.