FAG spherical roller bearing damage maintenance measures maintenance method

1, the cleaning of the bearing

When disassembling the lower roller bearing for inspection, first record the appearance of the FAG bearing, confirm the residual amount of the lubricant, and then wash the bearing after sampling the lubricant for inspection. As a cleaning agent, gasoline and kerosene are commonly used.

The cleaning of the removed bearing is divided into coarse cleaning and fine fine washing. In the container, the metal mesh bottom is placed first, so that the FAG bearing does not directly contact the container. When rough cleaning, if the bearing is rotated with dirt, it will damage the rolling surface of the bearing and should be noted. In the rough cleaning oil, use a brush to remove the grease and the adhesive. After it is almost clean, it is transferred to the fine wash.

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

2. Inspection and judgment of bearings

In order to judge whether the disassembled spherical roller bearing can be reused, it is necessary to check after the bearing is cleaned, carefully check the raceway surface, the rolling surface, the state of the mating surface, the wear of the cage, the increase of the FAG bearing clearance and Whether there are damages or abnormalities in which the dimensional accuracy is lowered. For non-separable ball bearings, use one hand to support the inner ring and rotate the outer ring to check if it is smooth.

Separate bearings such as spherical roller bearings can be inspected separately for the rolling surfaces of the rolling elements and the outer ring.

Large bearings cannot be rotated by hand. Pay attention to the appearance of rolling elements, raceways, cages, ribs, etc. The higher the importance of FAG bearings, the more careful inspection is required.

The judgment of whether or not to reuse is determined in consideration of the degree of bearing damage, mechanical properties, importance, operating conditions, and the period until the next inspection. However, if the following defects are not available, the new spherical roller bearings must be replaced:

(a) cracks or notches on any of the inner ring, the outer ring, the rolling elements, and the cage;

(b) rupture on any of the ferrules and rolling elements;

(c) Significant jams on the raceway surface, ribs and rolling elements;

(d) the cage is worn significantly or the rivet is significantly slack;

(e) There is rust and injury on the raceway surface and the rolling elements;

(f) There are severe indentations and marks on the raceway surface and rolling elements;

(g) The inner diameter of the inner ring or the outer diameter of the outer ring has obvious creep;

(h) discoloration due to heat;

(i) Bearings sealed with grease, the seal or dust cover is damaged.

If there is no choice error and can be used correctly, it can be used for a long time before the end of the life of the FAG bearing. In this case, the damage state of the general spherical roller bearing is peeling. On the other hand, there are accidental early damage, and early damage that cannot be used as a cause of this early damage.

The specific reasons are insufficient consideration for use and lubrication, as well as foreign matter intrusion, bearing assembly error and shaft deflection, and insufficient research on the shaft and bearing housing. It can be said that these reasons overlap with each other. Therefore, we recommend that you choose the size of the bearing according to the life formula of the FAG bearing, and on the basis of the machine used in the demodulation of the heart roller bearing, the conditions of use, and the structure of the outer periphery of the bearing, if the situation before and after the accident can be clarified, Combined with the damage of the bearing and various reasons, it can prevent the recurrence of similar accidents.https://www.supplyforever.com/