... . Compared to worm gear reducer, spiral bevel gear box is of flexiable operational capacity, high transmission torque and save more money ... Materials: 1.Spiral bevel gears: alloy steel,case hardened,be of high rigidity and wear risistance 2.Bearings: taper roller bearings ... , bear larger torque 3.Gearbox: cast iron, six faces of gearbox are machined by milling machine,gloss surfaces 4.Input ...