... iron or aluminum gearbox are available. NOSEN bevel gears box RNV-Series,cubic shape of gearbox.Model: RNV-065,RNV-090,RNV ... gearbox,input and output shaftsMaterials: 1.Spiral bevel gears: alloy steel,case hardened,be of high rigidity and wear risistance2.Bearings: taper ... bearings, bear larger torque3.Gearbox: cast iron, six faces of gearbox are machined by milling machine,gloss surfaces4.Input&Output ...