GENERAL MACHINE PRODUCTS 70351 CAPSTAN FIBER OPTIC 32" DIAMETER WITH TORQUE LIMITER OF 600 LBS NEW P/N 70351 consists of an aluminum alloy capstan drum measuring 34 3/4 in. outside diameter and a 32 in. diameter X 7 1/2 in. wide working surface. The unit is equipped with an integral torque limiter between the driving spindle and the inner hub. The torque limiter limits the pulling tension to a calibrated maximum that has been set at the factory to 600 pounds-force.