The Causes of NTN Rolling Bearing Problems

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NTN rolling bearings are susceptible to changes in their handling performance, rotational accuracy, and wear resistance due to both internal quality issues and external environmental conditions. When the bearing's performance falls below the required level for its application, it may fail to operate properly. This can lead to serious problems, causing machinery to stop working, which necessitates quick identification of the root cause and implementation of appropriate solutions. There are several common causes that lead to NTN bearing failures: 1. **Improper Lubrication**: Using expired or incorrect lubricants, overfilling grease, or having an excessive oil level can all affect the bearing’s performance. 2. **Contamination**: Foreign particles such as dust, sand, carbon powder, water, acid, or paint entering the bearing housing can cause damage. 3. **Incorrect Installation**: Improper installation techniques, such as directly hitting the bearing with a hammer, can lead to misalignment or damage. 4. **Shaft Misalignment**: If the shaft is bent or the shoulder size is not properly designed, it can cause friction between the shaft and the bearing seal. 5. **Insufficient Internal Grease**: Lack of sufficient grease inside the bearing can result in increased friction and premature wear. 6. **Incorrect Clearance**: Excessive clearance can cause vibration and instability, leading to early failure. 7. **Poor Housing Design**: An improperly sized bearing housing or incorrect fit between the bearing and housing can cause distortion or misalignment. Other contributing factors include improper tightening of the sleeve, which can lead to slippage during rapid starts, and debris left inside the housing that isn't cleaned before installation. To prevent these issues, it's essential to follow proper maintenance procedures, use high-quality lubricants, ensure clean installation environments, and regularly inspect bearings for signs of wear or damage.

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**Related Bearing Knowledge:** - Common methods for identifying automotive bearings - Proper installation techniques for KOYO rolling bearings - Differences between oscillating and standard bearings - Analysis of abnormal noises in motor bearings - Diagnosis and troubleshooting of rolling bearing faults

This article was originally published on China Bearing Network. For more information, visit our website. Previous: Analysis of Bearings for Railway Locomotives and Rolls Next: Ball Bearing Steel

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