Features:

This type of punch former uses thimble at both ends to process the punches so that they can get the same concentricity.

Can be used to measure the concentricity and roundness of the workpiece

This uses two top centers as the center and a grinding wheel as a tool to grind cylindrical steel parts to a precise concentricity.

Mainly used for precision grinding of the outer cylindrical surface of shaft and sleeve parts on surface grinders