Information on the most widely used ASTM standards within the materials testing industry
Snubbing and Capstan grips are all engineered to perform high strength tensile tests where the test samples are long compared to their cross-sectional area, such as wire, rope and strapping. Capstan Bollard grip designs are simple and cost effective gripping solutions that reduce jaw breaks and sample slippage that are common in direct clamp designs.
Snubbing and Capstan grips rely primarily on friction to hold the specimen. The end of the specimen is clamped lightly between the fixed and movable halves of the split capstan. This holds the specimen in place while it is being installed. Ample radii are provided where the specimen then wraps around the capstan half. For maximum holding power the clamped specimen can be wound counterclockwise around the fixed half and then around the movable half, to achieve an almost full 360 degrees of engagement around the circumference of the grip. If less holding power is required, or when testing shorter specimens, the clamped specimen can be wrapped counterclockwise around the movable half of the split capstan, providing 180 degrees of contact around the circumference.
General introduction
Snubbing and Capstan grips are all engineered to perform high strength tensile tests where the test samples are long compared to their cross-sectional area, such as wire, rope and strapping. Capstan Bollard grip designs are simple and cost effective gripping solutions that reduce jaw breaks and sample slippage that are common in direct clamp designs.
Snubbing and Capstan grips rely primarily on friction to hold the specimen. The end of the specimen is clamped lightly between the fixed and movable halves of the split capstan. This holds the specimen in place while it is being installed. Ample radii are provided where the specimen then wraps around the capstan half. For maximum holding power the clamped specimen can be wound counterclockwise around the fixed half and then around the movable half, to achieve an almost full 360 degrees of engagement around the circumference of the grip. If less holding power is required, or when testing shorter specimens, the clamped specimen can be wrapped counterclockwise around the movable half of the split capstan, providing 180 degrees of contact around the circumference.
It's sutiable for kinds of textile yarn material, thread etc., with wide range capacity.

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