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Take a look at your bearings,have you cleaned your bearings well?

wallpapers News 2020-11-12
Many people know that most of the newly-purchased bearings are coated with grease, but these greases are mainly used to prevent the bearing from rusting, and do not provide lubrication. The bearing is particularly easy to trap dirt, which is generally difficult. Wash thoroughly. Even if you buy unlubricated bearings, they will absorb dust due to magnetism and airflow over time. It is mixed with sweat and water vapor to form a "dirt cluster" in the bearing, between the balls, and at the gap, which is "fatal" to the rotation of the bearing.
If the bearing is used for a long time, it will come into contact with dust, oil or water in the air, causing the bearing to become dry, rusty, and affect its operation. At this time, bearing cleaning is very important.

How to confirm that the bearing is cleaned

After the bearing is cleaned, carefully observe that there will always be some remaining oil in the inner and outer ring raceways, on the rolling elements and in the gaps of the cage. During the inspection, scrape out the remaining oil with a clean feeler gauge, apply it to the thumb, and slowly rub back and forth with your index finger. If there is a rustle between your fingers, it means that the bearing has not been cleaned and should be washed again.
 
Finally, hold the bearing in your hand, pinch the inner ring, turn the outer ring to rotate horizontally (large bearings can be placed on the assembly table, the inner ring is cushioned, the outer ring is suspended, the inner ring is compressed, and the outer ring is rotated) to rotate Flexible, non-blocking, and no beating are qualified.
 
After adding lubricant to the cleaned bearings, they should be placed on the assembly table, with a clean cloth or paper pad underneath, and a plastic cloth on the top for assembly. They are not allowed to be placed on the ground or boxes.
 
When moving the bearing, it should not be held by hand. Use canvas gloves or wrap the bearing with a clean cloth before taking it, otherwise, the bearing surface may produce fingerprints and rust.
 
Bearings with dust caps or sealing rings on both sides and bearings coated with anti-rust and lubricating grease are already filled with grease during manufacture, so do not clean them before installation.

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