1. nonstandard reduction gearbox 2. gear wheel, gear, bevel gear, shaft, case, shaft block 3. ISO 9001:2000 4. high quality This ... shaft material: 20CrMnMo weight: 155kg speed ratio: i=3.944 normal modulus: mn=12 number of teeth: Z ... 45kg transverse module: ms=9 number of teeth: Z=15 tooth profile angle: a=20° addendum factor: ha= ... Q235-A5. shaft block material: ZG275-485H nonstandard reduction gearbox