... resistance&hardness 3.High precision 4.Oem offered 5.Sintered oil impregnated bearing Nantong Runfeng Powder Metallurgy Co., Ltd. is ... specializing in powder metallurgy,oil bearings,structural parts,gears(sprockets) and different parts ... gear,bevel gear,helical gear,bronze bearing,copper sleeve,oil impregnated,bushing,bush bearing,pulley,timing pulley,structural parts,powder ...