Rolling bearings on the manufacturing precision is very strict, demanding on the technical degree of specialization, so for the vast majority of easy to buy bearing varieties, it should be more cost-effective than the repair, and only consider bearing repair under the following circumstances problem. (1) Bearings used in ball mills are mainly in the form of wear, fatigue or fretting abrasion on the rolling surfaces. In particular, most of the damaged parts are cages or rolling elements, and the rings or gaskets still have a repair value. (2) The bearing is on the verge of failure or failure has not caused any major damage to the part or the bearing has to be found to prolong its useful life; (3) there is minor damage to the bearings, such as slight rust during the storage period and slight Fretting abrasion, such a situation easy to abandon the repair of a pity. Bearing repair not only to consider its economic benefits, but also consider the technical factors. Repairers fully understand the corresponding technical requirements of bearings, and bearings and parts in the structure, technology and materials on the characteristics, or difficult to ensure the bearing repair has the desired effect. It is advisable to cooperate with professional bearing enterprises in the maintenance of ball mill bearings because: (1) it is possible to clarify the technical requirements of each process of repairing and how to ensure the overall quality of the repaired bearing; (2) to make use of Professional experience in bearing plant expertise that reliably, efficiently and economically meets the process requirements; (3) custom-made tooling orders can be ordered from specialist bearing companies and borrowed for repair operations that may be economically and economically significant Trouble; (4) can be ordered to professional bearing companies such as cages, rolling elements, rivets and other accessories, may make the repair work simple and convenient and economical. In addition, in daily production should pay attention to the operation of the bearings to be monitored, the planned failure to repair before the bearing can receive more effective. At the same time, follow the reasonable process, the use of efficient repair equipment and tools, and obtain the help of a professional bearing plant, will help improve the economic efficiency of enterprises.