The purpose of lubrication of rolling bearings is to reduce internal friction and wear of the bearings and prevent burn-in. Its lubricating effect is as follows.
1, reduce friction and wear
In the mutual contact portion of the ferrule, the rolling element and the retainer constituting the bearing, metal contact is prevented, and friction and wear are reduced.
2, prolong fatigue life
The rolling fatigue life of the bearing is prolonged when the rolling contact surface is well lubricated during rotation; conversely, the oil viscosity is low and the lubricating oil film thickness is not good, which is shortened.
3, discharge friction heat, cooling
The circulation oil supply method or the like can be used to discharge heat generated by friction or heat from outside, and to cool. Prevent the bearing from overheating and prevent the lubricant from aging itself.
There is also the effect of preventing foreign matter from entering the inside of the bearing or preventing rust and corrosion.