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.
Force-fit grips:
Vice grips | Pincer grips | Wedge type grip | Screw type wedge action grips |
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External tensioning | Self-tensioning | Self-tensioning | External tensioning |
+ Symmetrical and asymmetrical clamping | - Only symmetrical clamping possible | - Only symmetrical clamping possible | + Symmetrical and asymmetrical clamping |
+ Light | + Light | - Heavy | - Heavy |
+ Adjustable clamping force | - Clamping and pre-clamping force cannot be adjusted | - Clamping and pre-clamping force cannot be adjusted | + Adjustable clamping force (Reproduceable clamping forces can be reached with a torque wrench) |
- For small forces |
| + Up to high forces | + Up to high forces |
- It is difficult to reach reproducable clamping forces |
| - Spring back after brittle fracture | + Frictional fixation after fracture |
- Clamping force decreases during testing | • Clamping force increases during testing | • Clamping force increases during testing | • Clamping force increases during testing |
- For polymers (thermoplastic, duroplastic), foils, food,... - Up to 20 kN | - For elastomers, plastics, textiles - Up to 20 kN | - For metals - Up to 600 kN | - For metals - Up to 250 kN |
Form-fit grips:
Specimen holder for shoulder, screw and thread head testing
![]() | Application: Clamping of tensile specimens that cannot be gripped directly with clamping jaws due to their size, geometry or structure
For example suitable for:
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Further information:
Wedge type grips:
Screw type wedge action grips:
Screw type wedge action grip 10 kN
Screw type wedge action grips 20 kN and 50 kN
Screw type wedge action grips 100 kN and 250 kN
Clamping jaws for screw type wedge action grips 100 kN and 250 kN
Specimen holder:
Videos:
Metal tensile test according to EN ISO 6892-1 with screw type wedge action grip