In screw grips the gripping force is applied manually or via an electric motor. These grips are used mostly for smaller test loads (from 20 N to max.50 kN) and thinner specimens fine wires, fibers, films.
Gripping force depends on the screw torque and grip compliance.
Very easy to operate.
Large opening widths for flexibility in use.
Most commonly used screw grips are U-shaped for good accessibility.
Simple design principle enables standard version to be resistant to high temperatures.
Depending on type these grips have an axial bearing in the gripping unit for increased gripping forces.
Many screw grips feature free adjustment of both jaws, allowing asymmetrical specimens to be tested.