... and large quantity used in gear box . Material: Carbon steel, alloy steel Main shaft for gear box parameters: Material EN10083-142CrMo+0 ... as many types of shafts, different kinds of flanges, gear rings, brake discs , roller ,tubular parts, and other ... : Forging is about 30,000 tons and main shaft is 1800 pieces more or less. Our company ... thanks for your concerning our company. Main shaft for gear box