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.
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