Cleaning of the bearing: When disassembling the ball bearing, check the appearance of the bearing, confirm the residual amount of the lubricant, and wash the bearing after sampling the lubricant for inspection. As a cleaning agent, gasoline and kerosene are commonly used.
The cleaning of the removed INA bearing is divided into coarse cleaning and fine cleaning. They are placed in the container respectively, and the metal mesh bottom is placed first so that the bearing does not directly contact the container. In 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 bearing while rotating it in the cleaning oil. In addition, the cleaning oil should always be kept clean.
Bearing inspection and judgment: In order to judge whether the removed bearing can be used, it should be checked after the INA bearing is cleaned. Check the raceway surface, the rolling surface, the state of the mating surface, the wear of the cage, the increase in the clearance of the self-aligning ball bearing, and the damage and abnormality with irrelevant dimensional accuracy. For non-separable miniature ball bearings, use one hand to support the inner ring horizontally and rotate the outer ring to check if it is smooth.
Separate bearings such as INA 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, and ribs. The higher the importance of bearings, the more careful inspection is required.
Grease has a very important protective effect on the bearing. In order to better play the lubrication effect of the grease on the bearing, we need to refer to six standards:
First: classification and selection of oils; mainly according to temperature and working conditions: oils and fats can be classified according to their allowable working temperature. The consistency and lubricating ability of oils are affected by working temperature, and one-way operation at a certain temperature. Bearings must be selected to have the correct consistency and good lubrication at the same temperature.
Second: anti-rust performance; the grease used in the INA bearing must have anti-rust effect, and the anti-rust agent is preferably insoluble in water. Grease should have good adhesion and form an oil film on the surface of the steel.
Third: the viscosity of grease; if the wrong choice of grease, all measures to prevent self-aligning ball bearings are futile, choose a kind of grease, its base oil viscosity is able to provide sufficient lubrication at working temperature is very important, the viscosity is mainly It is affected by temperature, it drops as the temperature rises, and it rises when the temperature drops.
Fourth: mechanical stability; grease will become soft during machining, resulting in leakage. In normal operation, grease will be trapped inside the bearing by the bearing housing. If the mechanical stability of the grease is insufficient, during the operation, the structure of the soap of the grease will mechanically disintegrate, causing the grease to be destroyed, thereby losing the lubricating effect.
Fifth: Do not mix grease; never mix incompatible greases. If two incompatible greases are mixed, the consistency will usually become soft. Finally, the INA bearing may be damaged due to the easy loss of grease.
Sixth: The oil seal should be strict; the oil seal is a necessary barrier to protect the self-aligning ball bearing and lubricant from external pollution. During the operation of the bearing, no matter whether the debris or moisture can penetrate into the bearing, it will prevent it from breaking.
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