Ceramic bearings are a type of bearing made of ceramic materials, commonly used for mechanical components in harsh environments such as high speed, high temperature, corrosion, radiation, etc. Due to their excellent performance that metal bearings cannot match, they have characteristics such as high temperature and cold resistance, wear resistance, corrosion resistance, magnetic and electrical insulation resistance, oil-free self-lubricating, and high speed. Can be used in extremely harsh environments and special working conditions, and can be widely applied in aviation, aerospace, navigation, petroleum, chemical, automotive, electronic equipment, metallurgy, power, textile, pump, medical equipment Due to the fact that ceramics are almost resistant to corrosion, ceramic rolling bearings are suitable for operation under harsh conditions filled with corrosive media. Due to the lower density and lighter weight of ceramic rolling balls compared to steel, the centrifugal effect on the outer ring during rotation can be reduced by 40%, thereby greatly extending their service life. Ceramics are less affected by thermal expansion and contraction than steel, so when the clearance between bearings is constant, bearings can be allowed to work in environments with significant temperature differences Due to the higher elastic modulus of ceramics compared to steel, they are less likely to deform under stress, which is beneficial for improving working speed and achieving higher accuracy