METALS 01 DuraSync side-acting grips straighten curved specimens 02 Advanced hydraulic wedge action grips 03
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2716-028 Pneumatic side-action grips
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Grips and Fixtures Wedge grips are the most commonly used grip type for metals testing. These can vary in how they perform. The industrial series DX/HDX testing systems can feature manual or hydraulic wedge grips built into the crosshead. Alternatively, manual, pneumatic, and hydraulic wedge grips are available in a range of capacities up to 2000 kN. 4.6
Application Overviews
For some applications it may be beneficial to use hydraulic side acting grips. Instron® DuraSync™ grips provide reliable clamping with repeatable alignment with a patented mechanical linkage that protects the grips from damage experienced from side load due to bent, bowed or curved specimens. Thin wires and foils can often be successfully tested using 2712 Series pneumatic and 2710 screw action tensile grips with smooth faces. Special grips are available for braided wires including 2714-010 wire tire cord grips, 2715 Series wire capstan grips, single and double side-acting grips with wire strand inserts and the SG series of wire and cable snubbing grips. For threaded or buttonhead specimens, 2717 Series, W-5158/W5159 shoulder end holders and W-5102 threaded end holders can be used. Fatigue tests on metals can be performed using a variety of pre-loaded mechanical and hydraulic grips: • 2742-301 30 kN hydraulic wedge grips are ideal for fatigue tests on smaller specimens as well as for r&n tests on sheet metals. • 2742 and 2743 Series mechanical and hydraulic wedge grips provide full reverse-loading capability with a wide range of jaw face types and sizes including carbide-coated. Fracture mechanics tests on CT specimens are readily performed with 2750 Series clevis grips. 2810 Series bend fixtures are ideal for fracture mechanics testing on bend specimens.
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