EXPANSION CLAMPING CHUCK

摘要

An expansion clamping chuck is disclosed for clamping at the same time a tool shaft and a hollow tool part, for example a bevelled bush. A massive chuck body (1) which can be clamped in the working spindle of a machine-tool has in its clamping part (4) a central bore (5) for receiving the tool shaft (6) to be clamped, and an outer clamping surface (13) for retaining the hollow tool part (14). An elongated ring-shaped chamber (7) filled with an incompressible medium is arranged inside the clamping part (4) of the chuck body (1) coaxially to the bore (5) and to the outer clamping surface (13). An hydraulic inner pressure in the ring-shaped chamber elastically deforms both its circumferential walls radially inwards for clamping the tool shaft and radially outwards for clamping the hollow tool part (14).