1,Preferential design is applied such as main parameter center distance and nominal drive ratio, which guarantee good interconnection between key parts and components. 2,All gear wheels are made of quality alloy steel and treated with carburetion and quenching, with tooth surface hardness up to HRC54-62. 3,Small size, light weight, high precision, large carrying capacity, high efficiency, long service life, high reliability, stable driving, and low noise. 4,Normally oil sump lubrication is used, with cooling naturally. If thermal power can not be achieved, circular oil lubrication or fan may be used, and cooled with cooling coil pipe.