Abstract: A drive mechanism for rotating a crankshaft in a machine tool for working on the crankshaft includes a disc rotatable about a horizontal axis coincident with the crankshaft axis, the disc having a radial slot to receive a throw of the crankshaft. An endless flexible drive belt extends around a greater part of the periphery of the disc except for an upper part of the disc periphery and around a drive device to rotate the disc and with it the crankshaft throw in the radial slot in the disc. The crankshaft can be inserted in and removed from the disc when the disc is orientated with the slot vertical and when rotated away from the vertical, the crankshaft throw is retained in the slot by reason of the endless drive belt extending over the slot.

Abstract: A grinding machine in which a workpiece, to have grinding operations carried out at different locations along the workpiece at different radii and at different angles, is mounted between centers on a slideway to present the locations on the workpiece to a motor driven grinding wheel mounted in a grinding head. The grinding head is mounted on a slideway to traverse the grinding wheel towards and away from the periphery of the workpiece. The grinding wheel is mounted on the slide for rotational adjustment about an axis extending tangential to the periphery of the grinding wheel at a location where the grinding wheel acts on the workpiece for adjustment of the angle of cut of the grinding wheel. Since the grinding wheel turns about an axis when its angle is adjusted, the position of an angle of cut is not otherwise varied by the angular adjustment of the grinding wheel.

Abstract: The invention relates to a grinding machine in which a workpiece such as a multi-stage compressor or turbine rotor to have grinding operations carried out at different locations along the workpiece at different radii and at different angles is mounted between sensors on a slideway to present the locations on the workpiece to be ground to a motor driven grinding wheel mounted in a grinding head. The grinding head is mounted on a slideway to traverse the grinding wheel towards and away from the periphery of the workpiece at a location where the grinding operation is to be carried out and the grinding wheel is mounted on the slide for rotational adjustment about an axis extending tangentially to the periphery of the grinding wheel at a location where the grinding wheel acts on the workpiece for adjustment of the angle of cut of the grinding wheel.

Abstract: A loading device is provided for a form follower which is primarily intended for use in following with a stylus a profile provided by a template and thus determining the movement of a tool. This arrangement is particularly suitable for the control of a tool for dressing a grinding wheel.