Mechanical Wedge Lever Action Grips

T-Grip Holders are available in load capacities from 22.2 to 150 kN (5,000 to 33,750 lbf.) These economical and versatile assemblies are designed for simplified specimen insertion and removal, a feature that saves time and reduces operator fatigue, increasing productivity in repetitive testing operations.

Engineered to be adaptable to both hydraulic and electromechanical UTM's, most T-Grip Jaw Holders are available with an open front style that assists with simple insertion and removal of test specimens. 

An assortment of interchangeable jaws will fit in the T-Grip holders, which allows for the acceptance of a range of sizes in both flat and round specimens. To increase the ease of operation, the locking mechanism of the lower holder keeps the grip jaws open so that one-handed specimen insertion is possible. 

The upper and lower grip bodies are structurally the same. Each grip body has a pocket that holds a pair of grip jaws and utilizes a wedge design. This wedge design causes the grips to further tighten as load on the specimen is applied, reducing occurrences of slippage.

Principle Of Operation

T-Grip Holders are available with two types of actuation, lever/spring or screw type.

All capacities of T-Grips are offered with lever/spring actuation, which uses a lever to raise and lower the jaws in the grip pocket and a spring to provide the initial clamping force on the specimen. When loading a specimen, the operator locks the bottom jaw open, then opens the upper jaw and places the top half of the specimen inside. Once the specimen is clamped securely within the upper jaw, the operator positions the bottom half of the specimen into the lower grip jaws and unlocks the jaws, providing clamping force and securing the specimen so that the test may be conducted. 

In the screw type actuation (offered in the 20,000 pound capacity model), a mechanical screw actuator, which is operated manually by turning a handle, opens and closes the grip jaws. This screw actuation provides a more secure initial gripping force and is ideal for hard materials testing where occurrences of slippage are prevalent.

Application Range

  • Type of Loading: static tension 
  • Specimen Material: wires, plastics, metals, elastomers 
  • Specimen Types: flat or round specimens