... steel , stainless steel , aluminum alloy , zinc alloy , brass , gray iron , nodular cast iron , ductile iron specifiedModuleNormal modal is between 1.5~10Out Diameter100mm-1500mmProcessingPrecision ... , zincing.FinishingSand blasting , polishing , plating , acid treatment , anodizing , painting and PVC powder coatingEquipmentSprial bevel gear milling machine, hobbing machine, grinding machine ...