... 3.high precision 4.good strength 5.excellent sintered gear wheel Nantong Runfeng Powder Metallurgy Co., Ltd. is specializing in ... --cleaning--vacuum oiling--packing3.material:steel,copper,steel copper,bronze,alloy.4.produce equipment:200T,100T,60T,25T,15T,10T,6T ... and many other field.like transmission gear,spur gear,gear wheel,helical gear,sleeve,copper sleeve,sleeve bearing, bushing, bush,pulley ...