The positioning clamping pin consists of a clamping screw, the actual clamping pin, an O ring and spring pre-loaded spherical clamping segments. It is available in both blackened heat-treated steel (1.4542) and precipitation hardened stainless steel in the diameters 16, 20, 25 and 30 mm. The clamping pin is inserted into the suitable locating bushing from above. Tightening the clamping bolt then presses the four balls located in the pin outwards against the inner wall of the locating bushing. Because the diameter of the bushing tapers towards the top, the pin then sits centrally and is securely fastened.