Yarn, Rope, Wire & Cord Grips

Yarn, rope, wire and cord testing grips — also called bollard grips — are used to test thin, flexible, and round or flat materials by holding them securely for accurate and repeatable test results.

Samples including materials like sutures, thread and yarn filament are looped around the bollard and secured with a vise clamp. Thick materials and high tensile values require large drums or bollards, around which the sample is wrapped multiple times. The larger contact and frictional area distribute the stress over a large section, reducing failure or slipping.

Thwing-Albert has several grip options for thin and thick filament and wire testing. 

Tips for Proper Grip Selection

It is essential for technicians to choose the correct yarn, rope and wire testing grip for the material. The proper grip ensures the results are reliable and repeatable. Many factors determine which testing grip is appropriate for the material. Thwing-Albert can help experts select the grip best suited for the material.

TAS13 Yarn and Cord Grip

The TAS13 pneumatic grip is a bollard-style instrument for cord, filaments, yarn, fine wires and fibers. It features a guide horn with a centering groove to make sample insertion easier and reduce stress on the sample to prevent breakage. These grips meet the industry standard ASTM D7269 Tensile Testing of Aramid Yarns.

Technicians can choose between three models — TAS13k with 200 newtons (N) of load capacity, TAS13m with 2 kN of load capacity and TAS13g with 5 kN of load capacity.

TA76 Rope and Yarn Grips

The TA76 grip is used to secure narrow ribbons, yarn, ropes, cords, fine wires and filaments. The sample is twisted around the guide roller and fixed with clamping jaws. The slow, notch-free stress relief in the guide rollers prevents the sample from breaking at its clamping point. This grip model is available in 1, 5 and 20 kN maximum load capacities.

TAS255 Rope Grip

The TAS255 rope grip is a steel, nickel-plated grip with a maximum load of 10 kN. The 26-mm guide roller can hold samples up to 4 mm. The coupling is Af 15.9, with additional couplings available upon request.

TA170 Capstan Rope Grip

The TA170 rope grip is used for ribbons and ropes up to 50 kilonewtons (kN). The sample is twisted around the guide roller and held by clamping jaws. Its guide rollers prevent the sample from breaking in the clamping area. Thwing-Albert also offers 100, 150 and 200 kN versions of this fixture.

Contact Thwing-Albert for Yarn, Cord, Wire and Rope Testing Grips

Thwing-Albert has more than 120 years of experience in instrumentation for filament materials. We have the equipment your operations need. Contact us for a free quote or more information today.