sheaves and pulley iron,steel,Alum,alloy pulleyAK,2AK,AKH,BK,2BK,BKH,V-Belts,Gripbelt ... .veariable pitch sheaves,Europe type sheavesiron,steel,Alum,alloy Yueqing Bethel Shaft Collar Manufacturing Co.,Ltd. Was established in 1972, the former Mechanical & ... itself. It is an ISO9002 certified Enterprise, specialized in manufacturing various specifications of sheaves. Zinc-plated Shaft Collars, Single ...