The Causes of Temperature Rise in NTN Bearings and the Corresponding Solutions

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When the temperature of an NTN bearing increases, it can be a sign of serious mechanical issues that need immediate attention. High temperatures not only reduce the lifespan of the bearing but can also lead to equipment failure or even safety hazards. Here are some common reasons for temperature rise in NTN bearings and how to address them. **Common Causes of Temperature Increase:** 1. **Cooling System Failure:** If the cooling water supply is interrupted or the system is not functioning properly, the bearing may overheat due to insufficient heat dissipation. 2. **Degraded Lubrication Oil:** Poor quality oil or oil that has become contaminated (e.g., mixed with water) can lose its lubricating properties. This leads to increased friction, which in turn raises the bearing’s temperature. Oil degradation can also cause acidic byproducts that corrode the bearing components. 3. **Improper Lubrication Levels:** Insufficient or excessive oil can both lead to overheating. Low oil levels mean inadequate lubrication, while too much oil can create resistance and increase internal friction. 4. **Mechanical Issues:** Abnormal noises, vibrations, or misalignment in the bearing can indicate underlying problems such as wear, imbalance, or incorrect installation. 5. **Faulty Seals or Gaskets:** Damaged seals or gaskets can allow contaminants to enter the bearing or cause oil leakage, both of which can lead to overheating. **Solutions and Preventive Measures:** - **Check the Cooling System:** Ensure that the cooling water flow is stable and the piping is free of blockages. If the filter is clogged, clean or replace it. If the issue persists, consider stopping the operation temporarily until the problem is resolved. - **Monitor Oil Condition:** Regularly check the oil for color changes, viscosity, and signs of contamination. If the oil is degraded, replace it with fresh, high-quality lubricant suitable for the application. - **Inspect Lubrication Levels:** Make sure the oil level is within the recommended range. Check the oil tank and drain valves for proper sealing. If there is a leak, top up the oil or repair the faulty component. - **Perform Vibration and Noise Analysis:** Listen for unusual sounds and check for vibrations. These can indicate bearing damage or misalignment. A bearing test can help identify any irregularities. - **Maintain Proper Sealing:** Ensure that all seals and gaskets are intact and functioning correctly. Replace any damaged parts to prevent contamination and oil loss. It's important to act quickly when you notice a temperature increase in an NTN bearing. While the above steps can help diagnose and resolve many common issues, each situation may require a different approach. Always consult with a qualified technician to ensure the problem is fully understood and properly addressed.

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**Related Articles:** - Determining the Criteria and Methods for INA Bearing Repair - NTN Bearing High Temperature: Precision Equipment Needs Precision Solutions - Understanding NTN Bearing Suffix Codes This article was originally published on China Bearing Network. For more information, visit [China Bearing Network](http://www.chinabearing.net). Previous: Cleaning of Rolling Bearings, Equipment and Disassembly Next: Types of Damage in Sliding Bearings

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