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

• External tensioning
• Field of application: Up to 20 kN, polymers (thermoplastic, duroplastic), foils, food,

Advantages:

• Light
• Symmetrical and asymmetrical clamping
• Adjustable clamping force 

Disadvantages:

• Only for small forces 
• Difficult to reach reproducable clamping forces
• Clamping force decreases during testing

Princer Grips

• Self-tensioning
• Field of application: Up to 20 kN, elastomers, plastics, textiles

Advantages:

• Light
• Clamping force increases during testing

Disadvantages:

• Only symmetrical clamping possible
• Clamping and pre-clamping force cannot be adjusted

Wedge type Grips

• Self-tensioning
• Field of application: Up to 600 kN, metals

Advantages:

• Up to high forces
• Clamping force increases during testing

Disadvantages:

• Heavy
• Only symmetrical clamping possible
• Clamping and pre-clamping force cannot be adjusted
• Spring back after brittle fracture

Screw type wedge action grips

• External tensioning
• Field of application: Up to 250 kN, metals

Advantages:

• Symmetrical and asymmetrical clamping
• Adjustable clamping force (Reproduceable clamping forces can be reached with a torque wrench) 
• Up to high forces
• Frictional fixation after fracture

Disadvantages:

• Heavy

Form-fit grips

Specimen holder for shoulder, screw and thread head testing

• Field of application: Clamping of tensile specimens that cannot be gripped directly with clamping jaws due to their size, geometry or structure
• For example suitable for:
  • Testing of thread specimen
  • Testing of shoulder specimen
  • Testing of screws
  • Testing of tubes
  • Testing of tapes