2016-10-12 Cranes are widely used in docks, construction industry, steel plants, and other construction industries that need to lift heavy objects. The crane reducer is mainly used in the four major mechanisms of crane lifting, running, slewing and luffing. According to the hardness of the tooth surface, the commonly used crane reducers in my country are divided into soft tooth surface, medium hard tooth surface and hard tooth surface gear reducers. According to the installation method, they are divided into horizontal, vertical, packaged, and suspended packaged types.