Wedge type collet chuck for clamping test specimens in materials testing machines have auxiliary wedges fitted between jaws and chuck guide surfaces

摘要

The invention proposes that between the jaws (11,12) of the chuck (1) and the guide surfaces (3,4) of the chuck auxiliary wedges (5,6) are fitted. The contact surfaces of the jaws and the auxiliary wedge are tapered so that screws (7,8) fixed to he jaws can adjust the position of the auxiliary wedge relative to the jaws.