Lubricating Oil
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Bearing Life
Control of Material FactorsAffecting Bearing Life
2022年3月16日

Cleaning, Maintenance and Judgment of Bearing

1. Bearing cleaning

When disassembling the lower bearing for maintenance, first record the appearance of the, confirm the residual amount of lubricant, and wash after sampling the lubricant for inspection. 

As a cleaning agent, gasoline and kerosene are commonly used.

The cleaning of the removed  can be divided into coarse cleaning and fine cleaning. Put the metal mesh pad on the bottom of the container respectively, so that the  does not directly contact the dirt of the container. 

During rough cleaning, if the  rotates with dirt, it will damage the rolling surface of the bearing, which should be paid attention to. In the coarse cleaning oil, use a brush to remove the grease and adhesion. After it is roughly clean, turn to fine cleaning.

Fine cleaning is to carefully clean the while rotating in the cleaning oil. In addition, the cleaning oil should always be kept clean.

2. Maintenance and judgment 

In order to judge whether the disassembled  can be reused, it is necessary to check after the  is cleaned, and carefully check the state of raceway surface, rolling surface and mating surface, the wear of cage, the increase of bearing clearance and whether there are damages and abnormalities related to the decline of dimensional accuracy.

For non separable small ball , support the inner ring horizontally with one hand and rotate the outer ring to confirm whether it is smooth.

Tapered roller bearings and other separable  can inspect the raceway surfaces of rolling elements and outer rings respectively.

Since large  cannot be rotated by hand, pay attention to the appearance of rolling elements, raceways, cages and retaining surfaces. The higher the importance of bearings, the more careful the inspection is.

Bearing cleaning

The judgment of whether the  can be reused is determined by considering the damage degree, mechanical performance, importance, operating conditions and the period until the next maintenance.

However, if there are the following defects, they can no longer be used and must be replaced with new Cleaning Bearing:

(a) Cracks or notches on any one of the inner ring, outer ring, rolling element and cage;

(b) Any one of the ferrule and rolling element is broken;

(c) There is significant jamming on the raceway surface, retaining edge and rolling body;

(d) Significant wear of cage or significant relaxation of rivets;

(e) There is rust and damage on the raceway surface and rolling element;

(f) There are serious indentation and indentation on the raceway surface and rolling element;

(g) There is obvious creep on the inner diameter surface of the inner ring or the outer diameter surface of the outer ring;

(h) Obvious discoloration caused by heat

(i) The grease seal or the dust seal are obviously damaged.Fine cleaning is to carefully clean the while rotating in the cleaning oil. In addition, the cleaning oil should always be kept clean.

Fine cleaning is to carefully clean the while rotating in the cleaning oil. In addition, the cleaning oil should always be kept clean.

Bearing is an important mechanical basic component, which is widely used in various fields of national economy and national defense. The machinery and working environment ofvary greatly, so special attention should be paid to the maintenance of  to improve the service life a kind of precision part with high dimensional precision. If it is installed improperly, it will lose its due precision and performance, and even cause  failure in serious cases. Therefore, the installation site and installation tools must be clean to prevent various particles from entering the 

When installing and disassembling the , do not hammer directly, but apply uniform pressure. When the fit interference between the shaft and the is large, the should be installed immediately after heating