Centering punch has hole-diameters matched to holes in template, with pressure bolt, compression spring, release, tapered ring and holes

摘要

The punch (1) is centered and the diameter matched to the hole in the template (11) by the end surface of the tapered ring (9) pressing onto the template, and the end surface of the cone pressing into the hole (13). As the threaded bolt (8) is retracted, the compression spring (6) is clamped between the pressure bolt (5) and the sprung lid (10) and is retained if he release is pressed (7) and the compression spring released. The pressure bolt is pressed with the punch on the steel plate (12) and marks the center of the holes.