... Standard: GB, JIS, ASTM and according to customer' requirments Module:0.2--10 Outer diameter: 6-800mm Spur Gear Product ... Spur gear Standard: GB, JIS, ASTM and non-standard. Module: 0.2~10. Outer diameter: 6~800mm Material: Mild ... , Steel 1045. Surface treatment: Carburizing, hardening and tempering, nitriding, high frequency treatment, black of oxidation, zincing, nickelage. Machine: CNC engine lathe ...