Hydraulic UTM Grips and Fixtures for High-Force Tensile Testing

Description

Hydraulic UTM grips and fixtures are used in high-force tensile testing to ensure that the materials are held securely and that the force is applied accurately. This category includes hydraulic side action grips and hydraulic wedge grips for pulling metal coupons, bars, rods, and other structural specimens. It also includes tensile shear fixtures, which apply tension to joints or bonded assemblies to evaluate shear strength, and proof load fixtures for fastener testing.

A typical nut-proof load setup uses a hardened threaded mandrel to hold the nut while axial load is applied to confirm that the threads can withstand the specified tension without stripping. These fixtures are built to support very high forces, as large fasteners and structural components may require testing at loads measured in hundreds of kilonewtons. Many hydraulic grips also incorporate interchangeable jaw inserts and reinforced clamping surfaces to support different specimen geometries and diameters.

The purpose of these fixtures is to apply high tensile forces with controlled alignment. Maintaining vertical load alignment is critical in hydraulic systems, since off-axis loading at high force can introduce bending stresses. With the right grips and setups for a hydraulic frame, users can carry out regular tests like ASTM E8 for metals and ASTM A370 for rebar, along with proof load tests for fasteners and tension-based shear tests. Each fixture is made to meet the specific test standards and works with powerful load cells and hydraulic systems.

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