Pneumatic action and snubbing style tensile grips are used for testing cord, tire cord, bead wire, cable, yarn, and tow specimens.
Pneumatic Action Tire Cord Grips
Pneumatic tire cord grips provide a convenient method for clamping tire cord and braided wire during testing. A guide pin allows for easy loading onto a graduated radius cam, which provides a stress-reduced clamping area on the specimen. The clamping mechanism can be activated either automatically or through a footswitch, which allows for hands-free grip operation, enabling the specimen to be held with both hands for easy loading. Pneumatic cord and yarn grips provide selectable clamping force to accommodate different materials and excellent follow-up action that compensates for decay of the holding force due to specimen creep.
Snubbing grips feature 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, and 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.