... , good service Precision casting Certification: ISO9001:2000 OEM/ODM service Helical gearsPrecision castingMaterials:stainless steel, carbon steel, cast iron, alloy etc ... , gear planer, high precision CNC maching centers and lathes.Types: helical gears, spur gears, bevel gears, ring gears, internal gears, stainless ... samples, drawings or description.Welcome to enquire and visit! Customized helical gear