Gearbox is made of superior low carbon alloy steel. Through carburization, quenching, milling gear, hardness of gear can get 58—62HRC, precision is grade 6-8. It can be mounted with solid shaft, hollow shaft, flange, spline hollow shaft, keyway hollow shaft and so on. Brake, backstops are available. It is widely used in steel plants, cement industry, mine industry, chemical industry, ports and so on.