They are operated via hand-wheel(s) and available with or without synchronization. The opening & closing (parallel) and holding force to the specimen is applied via hand-wheel(s) whereas the main gripping force is generated by the wedge action proportionally increasing to the applied tensile force.
The models with synchronisation are symmetrically closing through one hand operation. The synchronization can be switched on/off allowing to test both symmetrical and asymmetrical specimens or for example bonded shear
specimens.
In the non-synchronized versions, which are also suitable for clamping asymmetric specimens such as bonded shear specimens, the left and
right are closed and opened separately.
The models without synchronisation allows also to grip asymmetrically specimens such as bonded specimens.

Features

• Available for tensile forces up to 250 kN
• Available with or without synchronization
• Available with side or front hand wheels
• Proportional increase of the clamping force
  (self-clamping) to the applied tensile force.
• Easy insertion of the specimens thanks to
  the open front design
• The design allows short specimens to be
  gripped
• Long clamping length that minimizes the
  surface pressure
• Quick and easy change between the
  different jaws without tools
• Low overall height and low mass
• Flat jaws with sample stops for quick and
  precise specimen loading
• A hexagonal adapter enables the specimens
  tob e preloaded using a torque wrench
• Offers various coupling elements for
  compression or bending fixtures or smaller
  grips.
• Suitable for strain rate control tests
  according to ISO 6892-1 and ASTM E8