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For large forces

Screw grips up to 50 kN Download
Material
  • Metals
  • Plastics
  • Paper
  • Wood
Test load
  • 1 kN - 50 kN
Specimen shape
  • Round specimens
  • Flat specimens
  • Asymmetrical specimens
  • Sealed specimens
Type of test
  • Tensile
  • Compression
  • Alternating load

The screw grip for thin specimens

In screw grips the gripping force is applied manually or via an electric motor. These grips are used mostly for smaller test loads (from 1 kN to max. 50 kN) and thinner specimens—fine wires, fibers, films.

Advantages & features

Advantages & features

General advantages
Fmax 1 kN
Fmax 2.5 kN
Fmax 5 kN
Fmax 10 kN
Fmax 10 kN, insulating materials
Fmax 20 kN
Fmax 50 kN

General advantages

  • Adjustable opposing jaw for fast, easy testing, including joined (asymmetrical) specimens
  • If the test configuration changes the jaws can be changed quickly and easily - no tools required. The jaws are centered automatically.
  • The use of ball bearings enables secure gripping of the specimen even at low operating forces.
  • Large opening width enables flexibility in use.
  • Reliable specimen gripping guaranteed even with varying applications. Large range of jaws allows optimum matching of the grips to your application.
  • Even specimens prone to shrinkage are securely held via automatic re-tightening by means of a laminated plate spring
  • The grips are easy to operate in a temperature chamber and reach the test temperature quickly thanks to their very low mass.
  • Precise test results combined with high number of cycles achieved through centric insertion of specimen using easily adjustable centering stop.
  • Ergonomic, open design for fast, easy specimen insertion and clamping

Fmax 1 kN

  • Adjustable opposing jaw for fast, easy testing, including joined (asymmetrical) specimens
  • If the test configuration changes the jaws can be changed quickly and easily - no tools required. The jaws are centered automatically.
  • The use of ball bearings enables secure gripping of the specimen even at low operating forces.
  • Large opening width enables flexibility in use.
  • Reliable specimen gripping guaranteed even with varying applications. Large range of jaws allows optimum matching of the grips to your application.
  • Even specimens prone to shrinkage are securely held via automatic re-tightening by means of a laminated plate spring
  • The grips are easy to operate in a temperature chamber and reach the test temperature quickly thanks to their very low mass.
  • Precise test results combined with high number of cycles achieved through centric insertion of specimen using easily adjustable centering stop.
  • Ergonomic, open design for fast, easy specimen insertion and clamping

Fmax 2.5 kN

  • Large opening widths offer flexibility.
  • Adjustable opposing jaws allows eccentric specimen gripping, enabling asymmetrical gripping of specimens.
  • A range of jaws ensures optimum matching to test material: Various materials, surface structures and gripping surface sizes are available.
  • Jaws can be changed without tools. Easy side insertion into specimen grip and centering and fixing of jaws follow automatically.
  • High gripping force is achieved through the axial bearing and gear ratio in the clamping unit.
  • Prestressed spring disk induces automatic retightening in smaller areas. Specimens with lower thickness reduction can also be gripped securely over the course of the entire test.
  • High temperature resistance (-70 to +250 °C) is ideal for use in temperature chambers.
  • Simple handling
  • The U-design provides good accessibility to the screw grip and offers ample space for flexible specimen ends

Fmax 5 kN

  • Adjustable opposing jaw for fast, easy testing, including joined (asymmetrical) specimens
  • The use of ball bearings enables secure gripping of the specimen even at low operating forces.
  • Large opening width enables flexibility in use.
  • Ergonomic, open design for fast, easy specimen insertion and clamping
  • Uniform, parallel closing/gripping via precision 4-column guides ensures specimen is held securely.

Fmax 10 kN

  • No tools required for jaw change; simply slide into grips from side. Jaws are centered and locked into place automatically.
  • High temperature resistance (-70 to +250 °C) makes the grips ideal for use in temperature chambers.
  • Integrated jaw mountings.

Fmax 10 kN, insulating materials

  • The clamping distance is symmetrical to the tensile axis. This is advantageous because the specimen is not subject to bending moments.
  • Secure gripping is ensured by protruding pins located in the jaws.
  • A support grip located in the center of the screw grips facilitates gripping and vertical alignment of the specimen.

Fmax 20 kN

  • High temperature resistance (-70 to +250 °C) is ideal for use in temperature chambers.
  • Integrated jaw mounting.
  • An increased closing force is achieved through the axial bearing in the clamping unit.
  • Jaws can be changed without tools. Easy side insertion into specimen grip and centering and fixing of jaws follow automatically.

Fmax 50 kN

  • Absolute symmetrical force distribution is ensured through various design details.

    • Anti-backlash option for specimen holders: Play-free specimen location enables precise alignment in the tensile axis — essential for use with optical extension measurement systems.
    • Symmetrical bearing surfaces in the specimen grips: The specimen holders bear on two symmetrical contact surfaces in the specimen grips.
    • Specimen fully enclosed by all specimen holders: All specimen holders completely surround the specimen. A support sleeve is placed around the split holders for dumbbell specimens.
  • This also prevents them from spreading, minimizing holder recoil at specimen break.
  • Low overall height saves space in the test area.
  • Pure Mechanical solution: Pneumatic control unit and hydraulic power pack are not required.

Technical overview

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Related products and accessories

Downloads

Name Type Size Download
  • Product brochure: Specimen Grips and Test Tools PDF 4 MB
  • Product information: Screw grips, Fmax 1 kN PDF 493 KB
  • Product information: Screw grips, Fmax 2.5 kN PDF 2 MB
  • Product information: Screw grips, Fmax 5 kN/10 kN PDF 485 KB
  • Product information: Specimen grips for insulating material, Fmax 10 kN PDF 860 KB
  • Product information: Screw grips, Fmax 20 kN PDF 208 KB
  • Product information: Specimen grips for screws, shoulder and threaded head specimens, Fmax 50 kN/250 kN PDF 309 KB
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