Our new developed cone ball mill is kind of high efficiency design, because it adopts double series automatic core adjusting roller bearings, which greatly reduces the operation resistance, the energy is significantly saved. A cone-cylinder is added to the material output end of the original cylinder, which enlarges the effective capacity of the mill, and also makes medium distribution in the cylinder more reasonable. This series mill is widely used in the in non-ferrous metal, ferrous metal, non-metallic mineral processing plant and chemical and building materials industries for the abrasive purpose.