Ceramic ball bearings is designed for harsh environment, overload, low temperature, no lubrication condition in defense industry. It is the perfect combination of new materials, new technology, and new structure. Transformed it into civil technology, ceramic ball bearings can covered the precision, over medium-speed like whole steel bearing application fields. The performance and price of ceramic bearing is far superior to the whole steel bearings, its bearing usage life raised three times more than prsent bearing, it can save large amount of downtime repair time and reduce the wastage and inventory bearing spare parts, etc.