China best Spur Drive Transmission Sun Planetary Ring Gears cycle gear

Product Description Product Description Product Parameters Item Spur Gear Axle Shaft Material 4140,4340,40Cr,42Crmo,42Crmo4,20Cr,20CrMnti, 20Crmo,35Crmo OEM NO Customize Certification ISO/TS16949 Test Requirement Magnetic Powder Test, Hardness Test, Dimension Test Color Paint , Natural Finish ,Machining All Around Material Aluminum: 5000series(5052…)/6000series(6061…)/7000series(7075…) Steel:…