This kind of gearbox is a new transmission machine designed & manufactured by helical gear( ... : flange input, direct motor input, shaft input;3. Materials of gearbox body: HT250 high-strength cast iron;4. Materials of shafts ... . Brand of bearings: HRB, LYC,ZWZ,NSK;10. Noise of gearbox: 60-68dB.;11. Gear lubrication oil: Mineral oil or Synthetic ...