1. suitable for working speed comparison  

Due to the limitation of the centrifugal force of the rolling body and the temperature rise of the bearing, the speed of the rolling bearing can not be too high. It is generally applicable to the working state of medium and low speed.  The working speed of incomplete liquid lubricated bearings can not be too high due to the heat and wear of the bearings.  The high speed performance of fully liquid lubricated bearings is very good, especially when aerostatic sliding bearings use air as lubricant, their speed can reach 100000r/min.  

2. Comparison of power loss  

Due to the small friction coefficient of rolling bearings, their power loss is generally not large, less than incomplete liquid lubrication bearings, but when lubrication and improper installation will increase.  The friction power loss of fully liquid lubricated bearings is lower, but for hydrostatic plain bearings, the total power loss may be higher than that of dynamic plain bearings because of oil pump power loss. 

3. Comparison of service life  

Due to the impact of material pitting and fatigue, rolling bearings are generally designed for 5 to 10 years, or replaced during overhaul.  The bearing pads of incomplete liquid lubricated bearings wear seriously and need to be replaced regularly.  The life of fully liquid-lubricated bearings is theoretically infinite, but in fact, fatigue failure of bearing bush materials may occur due to stress cycles, especially dynamic sliding bearings.  

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