... CERTIFIED.2, Different kinds of gears, worm gears3, Standard and non-standard4, Material C45, 40Cr. 42CrMo. GG25 ... spur gear, bevel gear, sprial gear, internal gear, sprocket, chain wheel) transmission, reducer ,shaft and sleeve etc. ... peen gear faces and roots to increase load capacity7) Standard: ISO, GB, JIS, DIN, AGMA and non ... service & timely shipments12) Accept trial order OEM Sprocket Wheel Gear