The purpose of lubrication of rolling bearings is to reduce friction and wear inside 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 the outside to cool. Prevent the bearing from overheating and prevent the lubricant from aging itself.

4, others

There is also the effect of preventing foreign matter from entering the inside of the bearing or preventing rust and corrosion.