worm gear shaft 1. Good quality raw material, Precision machining, Strict inspection 2. ... raw material, Precision machining, Strict inspection2. non-standard, OEM availablesteel worm shaft 1,Standard: GB, JIS, ASTM and non-standard. 2. Material ... : Alloy Steel, Carbon Steel, Stainless Steel, Hardended & Tempered Steel, Cast Iron, Aluminum, Copper, Brass and so on 3. Heat Treatment ...