... 1. nonstandard reduction gearbox 2. gear wheel, gear, bevel gear, shaft, case, shaft block 3. ISO 9001:2000 4. high quality This kind of gear ... mainly include:gear wheel, gear, bevel gear and coordinate shaft, case, shaft block.Following is some parameters:1. gear wheel material: ... helix angle: β=13° direction of spiral: left3. bevel gear material: 20CrMnMo weight: 125kg transverse module: ms=9 number ...