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Pneumatic grips type 8297 for high performance fibres, Fmax 2.5 kN

Grips employing deflection (capstan grips)

With these grips the force on the specimen is decreased as it passes around a load reduction curve, allowing lower gripping forces to be used in the end clamps Maximum test load ranges from 500 N to 20 kN.

  • With pneumatic end clamping the gripping force remains constant, allowing high specimen throughput
  • Automatic centering of specimens via guide grooves in the load reduction curve
  • The symmetrical weight distribution allows the center of gravity of the grips to be near the tensile axis. No transverse forces are transmitted to the load cell via the specimen grips.

Roller grips Type 8464, Fmax 50 kN

Roller grips

The gripping force is generated by self-clamping via multiple looping. Exact strain measurement is performed using optical extensometer systems.

  • Available with a maximum force measurement range of 2.5 kN to 250 kN.
  • Specimens are easily inserted into the gripping area, which is freely accessible from the front (max. clamping width 220 mm).
  • Suitable for tests in temperature chambers (temperature range: -70 to +250 °C).

Type 8470 grips for ropes, Fmax up to 50 kN

Grips for ropes

Tensile stress on the specimen is reduced by friction on the load reduction curve. The ends are clamped mechanically via a screw (with force amplification if required), a wedge or a hydraulic gripping unit.

  • Maximum test load: 2.5 - 100 kN.
  • Tensile force reduction through single or multiple looping.
  • Interchangeable load-reduction rollers for optimum matching to specimen material.
  • Quick, easy specimen insertion requires little effort, making these grips suitable for series testing.

Type 8271 grips for ring specimens, Fmax 2.5 kN

Grips for ring specimens

These grips are suitable for testing elastomer ring specimens to DIN 53 504, Standard Ring 1 & 2. Force transmission is by positive clamping via horizontally mounted rollers.

  • The rollers rotate independently during the test via toothed belts or a coiled band spring and spiral mainspring
  • Rollers are freely accessible for easy specimen insertion (max. specimen width 80 mm) Safety device available for protection against specimen remains which may fly out
  • Fmax: 2.5 kN
  • Temperature range: -40 to +150 °C

Type 8330 grips for insulating materials

Grips for insulating materials

These grips are suitable for standard-compliant testing of insulating materials and can be used for forces up to 10 kN. The temperature range is between 0 and 50 °C and insulating material specimens up to 252 mm thick can be accommodated.

  • The gripping stroke is symmetrical to the tensile axis, preventing bending moments on the specimen
  • Secure gripping is ensured by protruding pins located in the jaws
  • A support strip located in the center of the grips facilitates gripping and vertical alignment of the specimen

Self-aligning specimen grips Type 8050 for medical applications

Self-aligning specimen grips

These self-aligning grips possess a rotating self-locking disc with various opening widths, allowing a large range of connecting elements to be tested; for example for determining the pull-off force of cable-end ferrules and for tensile tests on catheter connectors.

  • Maximum force 500 N
  • Disc locking feature enables tool-free changes between test environments
  • Easy changeover to additional rotating discs
  • Generous grip design-height enables testing of large specimens (e.g. needle pull-out tests on hypodermics)

Grips for tension springs, Fmax 500 N

Grips for tensile springs

Force transmission is via horizontal mounting bolts available in various diameters (maximum spring wire diameter 6 mm).

  • These grips are available in two versions, Type I with Fmax 50 N for fine spring wires and Type II with Fmax 10 kN.
  • Mounting bolts are freely accessible from the front for easy specimen mounting.
  • Temperature range: -70 to +250 kN

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