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    Wrap Grips for Universal Testing Machines

    Products > Tensile Grips > Wrap

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    Wrap Grips are also known as webbing grips or capstan fixtures and are designed for tensile testing of flat cordage - ribbons, slings, straps,  tarpaulin, and webbing. The flexible material is wound around the wrapping column and then secured with locking pins prior to the tensile test. These grips are ideal for high-strength textile webbing materials that are used in industrial applications such as shipping and construction. 

     

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    Custom Wrap Grips are also available on request. Special capstan grip projects that have been completed include extra wide grips and also a center wrapping drum with a knurled finish. 

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                                                                            ASTM

    A1023

    D6775

    D4268

    D2256

    D378

     

     

    How to use Capstan Grips

    Capstan Grips are easy to use,  however there are a few pointers that should be noted. 

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    1. Orient both fixtures so that they are facing the same way. They should mirror each other, rather than being offset.

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    2. Arrange the sample so that the connected end of the ribbon is aligned along the centerline of the apparatus. 

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    3. Always use both locking pins if there are 2. (20kN and up)

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    4. If the sample is slipping, try wrapping it around several more times.

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    5. Be sure to stand away from the machine when it is in operation. Test breaks from webbings, capstans, slings, and similar materials can be violent. Safety Glasses are recommended.

    Small Webbing Grip
    225 lb. Small Webbing Grip - 1kN

    These types of grips and fixtures are different than the previous wrap grips because they are designed for wider samples. Ribbons, Straps and Webbings are tested with these grips.

    Get a Quote
    Small Webbing Grip
    1K lb. Webbing Grip - 5kN

    These grips are perfect for testing ribbons and smaller strap type materials. They are a cheaper option because they are designed only to test narrow bands of about 1 in. in width.

    Get a Quote
    10kN Webbing Grip
    2K lb. Webbing Grip - 10kN

    These grips are slightly more robust than the smaller versions. To attach a webbing, guide the end through the center opening and wrap the sample on top of itself. Secure the ribbon by using the locking pin. Please see the Literature for more information

    Get a Quote
    Cut Sheet
    20kN Webbing Grip
    4.5K lb. Webbing Grip - 20kN

    These webbing and strap grips are used on dual column Universal Testing Machines.

    Get a Quote
    Cut Sheet
    50kN Webbing Grip
    11K lb. Webbing Grip - 50kN

    This version of the web fixture is made specifically for thinner ribbons. The working principle is the same but the design is more compact. A male adapter is pictured here. 

    Get a Quote
    Cut Sheet
     
    100kN Webbing Grip
    22K lb. Big Webbing Grip - 100kN

    The largest webbing grips use two locking pins instead of one. There are several different sizes for the center drums. Other options include substitute metals suitable for environmental chambers, and knurled or bumpy cylinder surfaces.

    Get a Quote
    Cut Sheet