When disassembling the lower bearing inspection, first record the appearance of the SKF cylindrical roller 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 bearing is divided into coarse cleaning and fine fine washing. In the container, 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 moving surface of the SKF cylindrical roller bearing, so you should pay attention to it. 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.
2. Inspection and determination of SKF cylindrical roller bearings
In order to determine whether the removed SKF cylindrical roller bearing can be reused, check the SKF cylindrical roller bearing after cleaning. Carefully check the raceway surface, the dynamic spring surface, the state of the mating surface, the wear of the cage, and the bearing clearance. The increase and the presence or absence of damage and abnormality regarding the decrease in dimensional accuracy. 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 SKF cylindrical roller bearings such as tapered roller bearings can be inspected separately for the raceway surface of the moving body and the outer ring.
Because large bearings cannot be rotated by hand, pay attention to checking the appearance of moving bodies, raceways, cages, ribs, etc. The higher the importance of bearings, the more careful inspection is required.
The determination of whether it can be reused is determined by considering the damage degree, mechanical function, importance, operation premise of the German SKF cylindrical roller bearing, and the period until the next inspection. However, if there are the following defects, they can no longer be used, and new bearings must be replaced:
(a) cracks or gaps in any of the inner ring, the outer ring, the moving body and the cage;
(b) There is a break in any of the ferrule and the moving body;
(c) obvious jamming on the raceway surface, ribs and moving body;
(d) The cage is significantly worn or the rivet is significantly slack;
(e) There is rust and injury on the raceway surface and the moving body;
(f) There are severe indentations and marks on the raceway surface and the moving body;
(g) There is significant creep in the inner diameter surface of the inner ring or the outer diameter surface of the outer ring;
(h) significant discoloration due to heat;
(i) SKF cylindrical roller bearings sealed with grease, and the seal or dust cover is damaged.
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