This machine is widely used in metallurgy, building materials, chemical industry and so on. It is suitable for the materials such as ore, copper ore, limestone, quartz andgranite in the middle and middle above hardness. When it works, the motor drives the eccentric bearing bushing via spring coupling, transmission shaft and a couple of cone gear wheel. It has the characteristics of large capacity, long life for vulnerable parts, and dilute oil station for continuous lubrication.