Expansion chucking device

摘要

The tensile force application device has a base body (2) clamping bush (4) with a tool receiver (5), a clamping ring (6) and a hydraulic chamber (7). There are several slots (4b) in the clamping bush, extending axially and spaced out from each other in the circumferential direction. The bush is sealed from the hydraulic chamber, to prevent hydraulic fluid (11) entering the slots.