nonstandard gear reducer

This kind of gear reducer is nonstandard, it mainly include: gear wheel, gear, bevel gear and coordinate shaft, case, shaft block. Following is some parameters: 1.gear wheel material: 20CrMnMo weight: 779kg speed ratio: i=3.944 normal modulus: mn=12 number of teeth: Z=71 tooth profile angle: a=20° helix angle: β=13° direction of spiral: left gear shaft material: 20CrMnMo weight: 155kg speed ratio: i=3.944 normal modulus: mn=12 number of teeth: Z=18 tooth profile angle: a=20° helix angle: β=13° direction of spiral:right 2. gear material: 20CrMnMo weight: 307.5kg speed ratio: i=4.5 normal modulus: mn=7 number of teeth: Z=90 tooth profile angle: a=20° helix angle: β=13° direction of spiral:right gear shaft material: 20CrMnMo weight: 72.4kg speed ratio: i=4.5 normal modulus: mn=7 number of teeth: Z=20 tooth profile angle: a=20° helix angle: β=13° direction of spiral:left 3. bevel gear material: 20CrMnMo weight: 125kg transverse module: ms=9 number of teeth: Z=59 tooth profile angle:a=20° addendum factor: ha=0.85 tip clearance coefficient: c=0.188 mean spiral angle: βm=35° direction of turning: two-way bevel gear shaft material: 20CrMnMo weight: 45kg transverse module: ms=9 number of teeth: Z=15 tooth profile angle:a=20° addendum factor: ha=0.85 tip clearance coefficient: c=0.188 mean spiral angle: βm=35° direction of turning: two-way 4. case material: Q235-A 5. shaft block material: ZG275-485H