WIRE AND CABLE SNUBBING GRIPS
W-5074M
Snubbing grips are typically supplied as a matched pair of grip bodies. Each body uses a spool to wrap the specimen around and a snubber (cam or clamp) to secure the free end of the specimen. Cable snubbing grips have a solid steel construction, while wire snubbing grips incorporate a hardened steel drum on an aluminum bracket. The grip body is designed so that the wire or cable specimen is pulled directly in line with the load cell. The snubbing mechanism is not designed to carry the full load applied to the specimen, rather the spool carries the load because the specimen is wrapped around it.
Principle of Operation W-5074 wire snubbing grips are designed to test wire ranging from 0.125 mm to 1.5 mm (0.005 in to 0.06 in) in diameter. The grips consist of a hardened steel drum secured to an aluminum bracket. The grip is equipped with a screw operated clamp, which acts as the snubber. This clamp is screwed down hand-tight to the specimen end, which requires no modification. The specimen is then wrapped around the spool one and a half to two and a half times, depending on the strength of the wire. W-5075 cable snubbing grips hold wire or cable specimens from 0.8 mm to 6.35 mm (0.0312 in to 0.25 in) in diameter. W-5074 cable snubbing grips hold wire or cable specimens from 0.125 mm to 1.5 mm (0.005 in to 0.6 in). Sockets or special end preparations of the specimen are not needed for these grips. The end of the specimen is placed between a cam lock and the spool, and secured by hand-tightening the cam lock. The design of wire and cable snubbing grips causes the majority of the tensile force to be carried by the spool rather than the clamp or cam lock, reducing specimen slippage. It also ensures that tension reaches its peak in the free section of the specimen, between the grips. This maximizes the probability that the failure will occur in the free length of wire or cable, and produce valid test results. 2714 Series pneumatic tire cord grips are specifically designed to test the steel reinforcing cords used in automotive tires. The special shape minimizes jaw breaks and the pneumatic action ensures quick loading with consistent and controllable gripping force.
Application Range • Types of loading: Static tension • Specimen material: Metallic materials • Specimen types: Wire, cable
Safety Advice Review safety note on page 234 www.instron.com/accessories
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