The Causes of NTN Rolling Bearing Problems

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NTN rolling bearings are sensitive to changes in their handling performance, rotational accuracy, and wear resistance due to both internal quality issues and external environmental factors. When the bearing's performance falls below the required level for its application, it may fail to operate properly, leading to defects or even total failure. Once an issue occurs, the machine or equipment may stop, making it crucial to quickly identify the root cause and implement appropriate solutions. There are several common causes that can lead to NTN bearing problems: 1. **Improper Lubrication**: Using expired or incorrect lubricants, over-greasing, or having excessive oil levels can negatively affect bearing performance. 2. **Contamination**: Foreign particles such as dust, sand, carbon powder, water, acid, or paint entering the bearing housing can cause severe damage. 3. **Incorrect Installation**: Improper installation techniques, such as directly hitting the bearing with a hammer or damaging the seal, can result in premature failure. 4. **Misalignment**: Shaft bending, improper shoulder design, or misaligned components can cause excessive wear and stress on the bearing. 5. **Clearance Issues**: Excessive clearance can lead to shaft oscillation, while too little clearance can cause overheating and increased friction. 6. **Shaft and Housing Fit**: If the shaft diameter is too small or the housing bore is not properly sized, it can lead to poor locking and potential slippage. 7. **Seal Damage**: Worn or damaged seals can allow contaminants to enter and cause lubricant leakage. It's important to ensure proper maintenance, correct installation, and regular inspections to prevent these issues. By understanding the root causes of bearing failures, engineers and technicians can take proactive steps to extend the life of NTN bearings and maintain smooth operation of machinery.

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Related Bearing Knowledge:

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• Difference between oscillation and normal bearings
• Analysis of abnormal noise in motor bearings
• Methods for diagnosing and troubleshooting rolling bearing faults

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

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