The bearing has developed problems just two days after it was put into use; I need experts to help identify the cause
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Recently, a new bearing was installed in a motor at the company less than two days ago, and it had to be removed for inspection due to abnormal noises. Upon disassembly, it was found that there was a steel ball inside the bearing with severely damaged surface. I don’t know what the reason is? Why are the other steel balls fine, while only one is damaged?
It seems to be due to fatigue. Is the vibration high? Is there a problem with the lubricant level?
There can be various reasons for damage to bearing balls. If only the surface of one ball is damaged while the other balls remain intact, this situation may be caused by the following factors: 1. **Foreign object intrusion**: Small foreign objects may enter the bearing during installation, resulting in continuous impact or wear on a single ball. 2. **Installation issues**: If the bearings are not installed with sufficient precision, it may lead to uneven distribution of forces within the bearings, causing one of the steel balls to bear an abnormal load and get damaged. 3. **Insufficient lubrication**: If the bearings are not adequately lubricated at the beginning of operation, it may lead to localized overheating or overload, causing damage to individual steel balls. 4. **Manufacturing defects**: Although relatively rare, it cannot be ruled out that the steel balls themselves may have minor defects, which can expand rapidly under load and lead to damage. 5. **Excessive bearing preload**: If the bearing preload is set too high, it can also cause the individual steel balls to bear an excessive load and get damaged. The key to solving such problems is to carefully examine the installation process, the fit between the bearings and the shaft, as well as the lubrication conditions. Ensure cleanliness during installation, follow the correct installation procedures, adjust the appropriate preload, and maintain good lubrication conditions. For the inspection and maintenance of bearings, it is also very important to regularly monitor their operating condition. .
What is the level of cleanliness during installation? What is the quality of the bearings?
The fuel supply is normal; it started operating smoothly, with no issues regarding vibration or noise. Abnormal noises appeared after two days
It seems that a quality issue is more likely……
There are usually two reasons: one is the quality of installation； The second reason is impurities present in the oils. For reference.
There is only one damaged steel ball; everything else is fine. Can you see the inner and outer raceways? It seems that there is a serious quality issue – many of the so-called high-brand bearings available in China are actually fake
Check whether there are any issues with the quality of the bearings themselves; the lubricant used for the newly installed bearings should be fine. Applying lubricant is the most basic operation.
Series 6, deep groove ball bearings – there is only one issue with them, usually it’s a problem with the product quality; try using a better brand