GRIP FOR HOLDING SPECIMENS IN MACHINES FOR ROTARY BENDING FATIGUE TESTING

摘要

A grip for holding specimens in machines for rotary bending fatigue testing comprises a body, centering collet chuck and coupling nut. The grip body comprises centrally mounted four-section collet, wherein in each section balls are arranged lengthwise. A conical washer slides over the balls under the pressure of the coupling nut, putting load on the collet holding a specimen.