For Testing High Strength Textile Materials

Webbing Capstan Tensile Grips

Webbing capstan grips are designed to permit faster, easier testing of seat belts and other high strength belts and tapes. Based on the capstan principle, these grips minimize slippage and jaw breakage effects, and permit the predetermination of specimen length while allowing for quick, convenient loading.

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Principle of Operation

These webbing capstan grips incorporate an ingenious double capstan design which provides fast, easy loading with a gripping action that results in proper breaks in the full gauge length of the specimen. The key to the ease of loading is the use of an inner and outer capstan. The specimen is loaded simply by inserting one end into the groove of the inner capstan and cranking it through 360 degrees. Gripping efficiency is also greatly increased because the surfaces of both capstans are utilized.

Application Range

  • Type of loading: static tensile
  • Specimen materials: webbing, belts, tapes
  • Specimen shapes: flat

Catalog no. 2715-003
Capacity 50 kN
Standards ASTM D6775, D3950
Maximum Specimen Width 50.8 mm
Maximum Specimen Thickness 4.75 mm
Temperature Range -29 °C to 121 °C
Upper and Lower Fittings Type Dm (1.25 in connection with 1/2 in clevis pin).
Rigid coupling required.
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