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