DBY, DBYK series of cylindrical gear reducer has the characteristics of high bearing capacity, high transmission efficiency, low noise, small size, light weight, long service life. Gear and gear shaft carburizing hardening quality low carbon alloy steel grinding process, the accuracy of the gear tooth surface hardness 6, HRC56-62. The salty speed controller is applied to the input shaft and the output shaft is vertically arranged transmission device, such as a belt conveyor, metallurgy, mining, transportation, cement, construction, chemical, textile, light industry etc.. Speed reducer drive for the first level of Gleason spiral bevel gear, second, three stage transmission for involute spur gear. In general, reducer lubrication by oil pool splash lubrication, cooling. When the equilibrium temperature reducer exceeds the specified value, or its work under the condition of higher environment temperature, the cooling pipe oil bath lubrication or circulating lubrication.