**Common Problems and Solutions in the Application of NTN Bearings**
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*Source: Bearing Network | Date: June 23, 2014*
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When using NTN bearings, several common issues may arise that can affect performance, longevity, and reliability. Understanding these problems and their corresponding solutions is essential for proper maintenance and optimal operation.
### 1. **Abnormal Load**
- **Cause**: Improper selection of equipment clearance or pre-tightening force.
- **Solution**: Choose the appropriate clearance and pre-tightening force based on the application requirements.
### 2. **Poor Assembly**
- **Cause**: Inaccurate machining of the shaft or improper installation techniques.
- **Solution**: Improve the machining accuracy of the shaft and use correct assembly methods to ensure proper fit and alignment.
### 3. **Lack of Lubrication**
- **Cause**: Insufficient or incorrect lubricant used.
- **Solution**: Apply the right type and amount of lubricant to ensure smooth operation and reduce friction.
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### 4. **Unusual Noise**
- **Cause**: Foreign particles, corrosion, indentations, or scratches on the bearing surface.
- **Solution**: Remove affected components and use clean, high-quality grease to prevent further damage.
- **Cause**: Wear from fatigue or excessive load.
- **Solution**: Replace the NTN bearing if signs of wear or damage are detected.
- **Cause**: Excessive clearance between parts.
- **Solution**: Ensure proper fit by selecting the right clearance and improving the cooperation between components.
- **Cause**: Scratches on the steel balls due to fatigue or foreign object jamming.
- **Solution**: Replace the NTN bearing if the damage is significant.
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### 5. **Abnormal Temperature Rise**
- **Cause**: Over-lubrication.
- **Solution**: Reduce the amount of lubricant to avoid overheating.
- **Cause**: Insufficient or inappropriate lubricant.
- **Solution**: Add the correct type of lubricant or choose a more suitable one based on operating conditions.
- **Cause**: Creep on the mating surfaces or oversized sealing devices.
- **Solution**: Adjust the outer or inner diameter of the bearing and consider changing the sealing method.
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### 6. **Excessive Shaft Oscillation**
- **Cause**: Fatigue or shedding of the bearing components.
- **Solution**: Replace the NTN bearing if structural damage is present.
- **Cause**: Poor assembly or foreign particle intrusion.
- **Solution**: Improve the machining accuracy of the shaft and ensure clean installation practices.
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### 7. **Lubricant Leakage**
- **Cause**: Excess lubricant or damaged seals.
- **Solution**: Check and adjust the lubricant level, and replace damaged seals if necessary.
- **Cause**: Contamination from foreign particles.
- **Solution**: Clean the bearing and surrounding areas, and use high-quality, contamination-free lubricants.
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### 8. **Discoloration**
- **Cause**: Over-lubrication or contamination.
- **Solution**: Remove excess lubricant and clean the bearing thoroughly.
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### Anti-Friction NTN Bearings
Anti-friction NTN bearings are primarily divided into two types: **ball bearings** and **roller bearings**. Each has its own advantages and is suited for different applications. The design and structure of these bearings have evolved over time, resulting in a wide range of specialized models tailored to specific industrial needs.
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### Related Bearing Knowledge
- **Bearing Running Track and Load Analysis**: Understand how the load affects the oscillation of rolling bearings used in vibrating screens.
- **Function of Stainless Steel Bearings**: Learn about the unique properties and applications of stainless steel bearings.
- **Layout Features of Joint Bearings**: Explore the design and configuration of joint bearings for various mechanical systems.
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For more information, visit [China Bearing Network](http://www.chinabearing.net)
This article was originally published on [Bearing Network](http://www.bearingnetwork.com)
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