Designed as an integral part of the testing platform, in-head wedge grip jaws fit directly into the crosshead pocket of the frame and provide a grip that is adaptable to a variety of testing applications. These jaw faces are made from rugged heat-treated steel designed for durability and minimal maintenance, and are ideal for testing a variety flat, round, and cable specimens in compliance with ASTM E8. The teeth of the jaws are also hardened, and different tooth options increase the application range: a coarse tooth pattern is best for softer materials and higher loads, whereas a finer tooth pattern is best for harder materials. The wedge design causes the gripping force to increase as more tension force is applied. This ensures a secure gripping action with minimal slippage throughout the range of the test.
Filler plates are provided with the purchase of testing frames and allow a variety of specimen thicknesses to be tested. The filler plates adjust the opening of wedge grip jaws by changing the width of the crosshead pocket. All plates should be used for the thinnest specimens and no filler should be used for the thickest specimens.