Z Series Medium-size D.C. Motor(ZBK23001-89) It has stronger mechanical structure and contiouous overioad capacity. Power range:75-600kW Rated speed:400-1500r/min ZZJ-800 Series Rolling Mill Auxiliary Drive D.C. Motor (GB5227-85) It has larger overload multiple, and it is suitable for metallurical crane, metallic rolling mill, etc. Power range:3.75-186kW Rated speed:435-1130r/min ZZJ-900 Series Low Inertia Rolling Mill Auxiliary Drive D.C. Motor Power range:3.75-186kW Rated speed:400-3000r/min