Wedge Screw Grips Series KSP up to 250 kN

These manual operated wedge screw grips are well suited for tensile tests on metals, hard and reinforced plastics, (geo)-textiles, wood and other similar materials. The KSP series of manual operated mechanic grips combines the advantages of screw grip and wedge grip functions.
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
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.


  • 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
  • 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
  • Suitable for strain rate control tests
    according to ISO 6892-1 and ASTM E8
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