1. No need for oil supply device, oil injection hole, oil tank processing, oil supply device costs, processing costs, assembly costs and other excess costs and time savings, can greatly reduce manufacturing costs; 2. The reduction of operating costs greatly reduces the use of lubricating oil and the maintenance cost of equipment, and also eliminates the risk caused by insufficient oil supply; 3. The shortening of the design time, oil free can greatly simplify the design, structure, reduce costs, save design time, in addition, the use of self-lubricating bearings can also improve mechanical properties, extend the service life and improve reliability and other aspects to obtain significant results; 4. The recovery and environmental protection of lubricating oil, without waste oil recycling, is conducive to protecting the environment. CRB650 self-moistening bearing as a mechanical industry parts, has a certain broad sense of use.