1). Significant energy saving. Because of the characteristics of rolling bearing’s own movement, its friction force is much smaller than that of sliding bearing, which can reduce the power consumption consumed in friction resistance, so the energy saving effect is remarkable. From theoretical analysis and production practice, the general small ball mill with rolling bearing in main bearing can save 30%~35%, medium-sized ball mill can save 15%~20%, and large ball mill can save 10%~20%. Since the ball mill itself is a major energy consumer in production, this will mean a considerable amount of cost saving.
(2). Easy maintenance and reliable quality. The use of rolling bearings can eliminate the melting of pasteurized alloy material, casting and scraping tile and a series of complex and technically demanding maintenance process as well as oil supply and water supply cooling system, so the maintenance volume is greatly reduced. And rolling bearing is manufactured by professional manufacturers, the quality is often guaranteed. It also brings convenience to ball mill manufacturers.
Advantages
1、Low frictional resistance, low power consumption, high mechanical efficiency, easy to start.
2, standardized size, interchangeability, easy installation and disassembly, convenient maintenance.
3, compact structure, light weight, axial size more reduced.
4, high precision, high load, low wear, long service life.
5、Some bearings have the performance of automatic centering.
6, suitable for mass production, stable and reliable quality, high production efficiency.
7, transmission friction torque is much lower than fluid dynamic pressure bearings, so the friction temperature rise and power consumption is lower.
8、Starting frictional torque is only slightly higher than the rotating frictional torque.
9、The sensitivity of bearing deformation to load changes is less than that of fluid dynamic pressure bearings.
10、Only a small amount of lubricant is needed for normal operation, and the lubricant can be provided for a long time during operation.
11、The axial dimension is smaller than the traditional fluid dynamic pressure bearing.
12, can simultaneously withstand radial and thrust combined load.
13, in a large range of load – speed, the unique design can obtain excellent performance.
14, bearing performance is relatively insensitive to fluctuations in load, speed and operating speed.
Disadvantages
1、Large noise.
2, the structure of the bearing housing is more complex.
3、Higher cost.
4, even if the bearings are well lubricated, installed correctly, dust and moisture tight, normal operation, they will eventually fail because of rolling contact surface fatigue.

By