Lubrication grease is an important component of a bearing,which has an significant influence on bearing life.It is great significant for prolong the fatigue life of bearing to research bearing fatigue life based on grease lubrication.This paper analyzes the phenomena of starved lubrication under grease lubrication,and points to the contradictions lubrication design combined with practical application of bearing.The different additives are selected and added into the polyurea greases.These samples are used t...