If the grease used in SKF tapered roller bearings cannot be used, if it is not noticed, it will cause great damage to SKF tapered roller bearings. Therefore, you must learn how to judge whether the grease can be reused.
Oil droplet trace method
Take a clean white filter paper, drop a few drops of oil on the filter paper. After the oil leaks, if there is a black powder on the surface, touch the hand with a feeling of resistance, it means that there are a lot of impurities in the lubricant. Good lubricants are powder-free, dry and smooth by hand, and have yellow marks.
2. Handcuffs
The lubricant is rubbed repeatedly between the thumb and the index finger. The better lubricant feels lubricated, less wear debris, and no friction. If you feel a large friction between the fingers, it means lubrication. There are many impurities in the oil, which can no longer be used. New lubricants should be replaced.
3. Illumination method
On a clear day, use a screwdriver to pick up the oil at a 45-degree angle to the horizontal. In the light of the sun, observe the oil droplets. Under the light, it can be clearly seen that there is no wear debris in the lubricating oil, which can be inherited. If the grinding debris is too much, the lubricating oil should be replaced.
4. Oil flow observation method
Take two measuring cups, one of which is filled with the lubricating oil to be inspected, the other is placed on the table, and the measuring cup filled with lubricating oil is lifted off the table 30-40 cm and tilted to allow the lubricating oil to slowly flow to the empty cup. In the middle, observe the activity, the quality of the lubricating oil flow should be slender, average, continuous, if the oil flow suddenly and slowly, and sometimes there is a large flow, then the lubricant has deteriorated.
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