S45C 20CrMnTi 40Cr 42CrMo High quality rotor on-time delivery 1.We specializes in rotor ,spur gear, helical gear,slewing ring ... MOD can be up to 0.4-18mm.Max OD can be up to 2m. 3.Quality:finest material and process.Hardened and durable,good connection 4 ... the deals successfully with India, Iran,Germany,Japan and many other countries.Wormly welcome to visit our factory. Good quality Rotor , gear