The cam grinding process involves one pass across each of the lobes in high gear with the wheel winding in at a preset speed to the desired base circle size then a preset time delay with the wheel remaining in its final position against the lobe to allow the wheel to spark out 30 ensp 0183 ensp 5 Most of the column clamps cannot be magnetized In the case of surface grinding the workpiece can only be clamped by mechanical clamping or special fixtures and the workpiece is clamped around the workpiece surface to cause deformation and shape or