sheaves and pulley iron,steel,Alum,alloy pulleyAK,2AK,AKH, ... After thirty-year development, It has been enlarging and improving itself. It is an ISO9002 certified Enterprise, ... specifications of sheaves. Zinc-plated Shaft Collars, Single and Double Split Collars, Stainless Steel Shaft Collars, S ... , QD, BM Style Split Taper Bushings, Ductile iron shaft collars and all kinds of Weld-on Hubs, Taper-Licked ...