Helical gear High qulity, competetive price, good service Precision casting Certification: ISO9001:2000 OEM/ODM service Helical gearsPrecision castingMaterials:stainless steel, ... heat treatment, surface machiningTools: gear shaper, gear planer, high precision CNC maching centers and lathes.Types: helical gears, spur gears, bevel ... or description.Welcome to enquire and visit! Customized helical gear