The bearing axle rotates all the time through the sleeve, and the inner part of the wheel needs oil to lubricate. But if the sealing ring is not good, it is easy to cause oil leakage. In this case, the axle and the sleeve are easy to wear and tear without lubrication, resulting in the product can not be used. There are several reasons for oil leakage:
1. Floating oil seal is not qualified;
2. Roundness of product sleeve is not enough;
3. The gloss of the supporting axle is not enough.
4. Gear oil does not meet the standard.
5. Machining dimension tolerance and so on.
All these problems will lead to oil leakage of the supporting wheels.
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