The temperature of the bearing is a bit high and there is still oil left. Should we add more lubricating oil when starting up next time

The temperature of the bearing is a bit high and there is still oil left. Should we add more lubricating oil when starting up next time

In order to determine whether the disassembled bearings can be used, they should be inspected after the bearings have been cleaned. Check the condition of the raceway  , 

rolling surface, and mating surface, the wear of the cage, the increase in bearing clearance, and any damage related to the decrease in dimensional accuracy, and any 

abnormalities. For non separable small ball bearings, use one hand to support the inner ring horizontally and rotate the outer ring to confirm smoothness.

Conical roller bearings and equally spaced bearings allow for separate inspection of the rolling elements and outer race raceway surfaces.Large bearings cannot be rotated by 

hand, so it is important to check the appearance of the rolling elements, raceway surfaces, retainers, and retaining surfaces. The higher the importance of bearings, the more 

careful the inspection must be.

The purpose of bearing lubrication:

The lubrication purpose of rolling bearings is to reduce internal friction and wear, prevent burning and sticking, and its lubrication effect is as follows.

(1) Reduce friction and wear.

To prevent metal contact and reduce friction and wear at the contact parts between the rings, rolling elements, and retainers that make up the bearing.

(2) Extend fatigue life.

The rolling fatigue life of bearings is extended when the rolling contact surface is well lubricated during rotation. On the contrary, if the oil viscosity is low and the lubricating oil film thickness is not good, it will be shortened.

(3) Eliminate frictional heat and cool down.

Circulating oil supply method can use oil to remove heat generated by friction or heat transmitted from the outside, and cool it down. Prevent bearing overheating and prevent lubricating oil from aging on its own.

(4) Other

It also has the effect of preventing foreign objects from entering the interior of the bearing, or preventing rust and corrosion.

Lubrication method:

The lubrication methods for bearings are divided into grease lubrication and oil lubrication. In order for bearings to function well, the first step is to choose a lubrication method that is suitable for the usage conditions and purposes. If only lubrication is considered, the lubricity of oil lubrication has the advantage. However, grease lubrication has the advantage of simplifying the structure around the bearing. Compare the advantages and disadvantages of grease lubrication and oil lubrication.

Installation of bearings:

The correct installation of bearings affects accuracy, lifespan, and performance. Therefore, the design and assembly department should conduct thorough research on the installation of bearings. I hope to install according to the homework standards.

The items for homework standards are usually as follows:

(1) Clean bearings and their related components;

(2) Check the dimensions and precision machining of related components;

(3) Installation;

(4) Inspection after installing the bearings;

(5) Supply lubricants.