A, in the contact between the rolling surface or sliding surface form a layer of oil film separating the surface, reducing the contact surface friction and wear.
b, the use of oil lubrication, especially the use of circulating oil lubrication, oil mist lubrication and oil spray lubrication, lubricating oil can take away the most of the internal friction heat of the bearings, play an effective role in heat dissipation.
C, the use of grease lubrication, can prevent external dust and other foreign bodies into the bearings, play a closed role.
D, Lubricants have the role of preventing metal rust.
E, prolong the fatigue life of the bearings.