Capstan & Bollard Tensile Grips

Capstan and bollard tensile grips prevent jaw breaks by wrapping high-strength flexible specimens around a smooth curved post to safely dissipate loading stress.

Engineered for testing yarns, thread, cordage, fine wires, sutures, filament lines, and flexible narrow ribbons, these specialized grips utilize surface friction to eliminate stress concentration points before securing the specimen tail in a final holding clamp.

Available in manual and pneumatic actuation options, capstan grips ensure uniform axial alignment and repeatable test results across flexible materials. Compatible with international testing standards including ASTM D2256, ASTM D0713, and ISO 2062 for universal testing machines.