Traction testing wedge grip

Mechanical specimen grips
Gripping, clamping, holding – from rough to fragile

Hegewald & Peschke offers a wide range of mechanical grips for tensile tests. This includes both from-fit and force-fit grips, each of which can be used for a wide range of materials, specimen shapes and temperature ranges.

Vice grips
External tensioning
+ Symmetrical and asymmetrical clamping
+ Light
+ Adjustable clamping force
– For small forces
– It is difficult to reach reproducable clamping forces
– Clamping force decreases during testing
– For polymers (thermoplastic, duroplastic), foils, food,…
– Up to 20 kN

Pincer grips

Self-tensioning
– Only symmetrical clamping possible
+ Light
– Clamping and pre-clamping force cannot be adjusted

• Clamping force increases during testing
– For elastomers, plastics, textiles
– Up to 20 kN

Wedge type grip
Self-tensioning
– Only symmetrical clamping possible
– Heavy
– Clamping and pre-clamping force cannot be adjusted
+ Up to high forces
– Spring back after brittle fracture
• Clamping force increases during testing
– For metals
– Up to 600 kN

Screw type wedge action grips

External tensioning
+ Symmetrical and asymmetrical clamping
– Heavy
+ Adjustable clamping force (Reproduceable clamping forces can be reached with a torque wrench)
+ Up to high forces
+ Frictional fixation after fracture
• Clamping force increases during testing
– For metals
– Up to 250 kN

Options : for traction testing