What is the role of bearing grease in bearing operation?

Lubrication has an important impact on the fatigue life of rolling bearings and friction, wear, temperature rise, vibration, etc. Without normal lubrication, bearings can not work. 

Analysis of the causes of bearing damage shows that about 40% of bearing damage is related to poor lubrication.

Therefore, good lubrication of bearings is an effective measure to reduce bearing friction and wear. In addition, the lubrication of the bearing also has a variety of functions such 

as heat dissipation, rust prevention, sealing, impact mitigation, etc. The role of bearing lubrication can be briefly described as follows:

a. An oil film is formed between the two rolling surfaces or sliding surfaces in contact with each other to separate the two surfaces to reduce friction and wear on the contact 

surface.

b. When using oil lubrication, especially when using circulating oil lubrication, oil mist lubrication and oil injection lubrication, the lubricating oil can take away most of the friction heat inside the bearing and play an effective heat dissipation role.

c. When grease lubrication is used, foreign matter such as external dust can be prevented from entering the bearing and play a sealing role.

d. Lubricants have the effect of preventing metal rust.

e. Prolong the fatigue life of bearings.