Tool for clamping bar-shaped samples in materials testing machines
A tool for clamping bar-shaped samples in clamping heads of materials testing machines consists of a wedge-shaped holding piece (16) which is displaceable in the clamping head, and a clamp jaw (18) which can be interchangeably pushed into a transverse groove (19) of the holding piece. For convenient interchangeability of the clamp jaw (18), the invention provides that the holding piece (16) carries a captive wire stirrup spring (24) running through its transverse groove (19) and received under stress by a guide groove (26) provided on the clamp jaw. The stirrup spring (24) gives rise to a partially positive and partially frictional fixing of the clamp jaw (18) to the holding piece (16), only rectangular guide profiles being required. <IMAGE>