Abstract:
This disclosure relates to a work driving apparatus, particularly for a cam contour grinder, for applying a driving torque at two angularly spaced points on a workpiece so that the entire force transmitted by the work driving apparatus acts to turn the workpiece and there is no force to cause radial displacement of the workpiece. The work driving apparatus is particularly adapted for use in conjunction with a workpiece having a flange at one end and an orienting hole in the flange. The work driving apparatus includes a driving block which carries a locating pin which is proportioned for a close fit in the hole in the workpiece flange to maintain the workpiece in a predetermined oriented position during the grinding thereof. The driving block is mounted for floating movement so as to compensate for variations in workpieces and is pivotable about the axis of the locating pin to engage a jaw carried thereby with the workpiece at a point remote from the locating pin.