... of gears (spur gear, bevel gear, sprial gear, ring gear, internal gear, sprocket, chain wheel) transmission, gear box, reducer ,shaft ... alloy , zinc alloy , brass , gray iron , nodular cast iron , ductile iron specifiedModuleNormal modal is between 1.5~10Out Diameter100mm ... precision on teeth of gear.CertificateISO9001:2000Minimum quantityAccept trial order ductile iron gear box for corn harvester/ ...