Common bearing anomalies
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**Common Bearing Anomalies**
Home > Bearing Knowledge > Common Bearing Anomalies
Source: China Bearing Network | Date: October 13, 2013
Bearing failures can lead to significant mechanical issues and downtime. Understanding the common causes and solutions is essential for maintaining equipment efficiency and longevity. Below are some typical bearing anomalies and their corresponding corrective actions.
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### **Loud Metal Noise**
**Causes and Solutions:**
1. **Abnormal Load:**
- *Cause:* Improper load distribution or excessive stress on the bearing.
- *Solution:* Adjust the load, ensure proper fit between components, and check bearing clearance.
2. **Poor Equipment Quality:**
- *Cause:* Inaccurate machining of shafts or housing.
- *Solution:* Improve machining precision and use high-quality equipment.
3. **Insufficient or Incorrect Lubrication:**
- *Cause:* Lack of lubricant or using an incompatible type.
- *Solution:* Add the correct lubricant and choose a suitable one based on operating conditions.
4. **Contact Between Rotating Parts:**
- *Cause:* Misalignment or faulty seals.
- *Solution:* Correct seal alignment and ensure proper sealing mechanisms.
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### **Rhythmic Noise**
**Causes and Solutions:**
1. **Contamination on Rolling Surface:**
- *Cause:* Foreign particles causing indentations, rust, or scratches.
- *Solution:* Replace the bearing, clean the area, and improve sealing to prevent future contamination.
2. **Deformation After Carburizing:**
- *Cause:* Structural distortion due to heat treatment.
- *Solution:* Replace the bearing and ensure proper application practices.
3. **Surface Peeling:**
- *Cause:* Wear or fatigue on the rolling surface.
- *Solution:* Replace the bearing immediately to avoid further damage.
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### **Irregular Noise**
**Causes and Solutions:**
1. **Excessive Clearance:**
- *Cause:* Too much play between internal parts.
- *Solution:* Adjust bearing clearance and preloading as needed.
2. **Foreign Matter Intrusion:**
- *Cause:* Particles entering the bearing.
- *Solution:* Replace the bearing, remove contaminated parts, and enhance sealing systems.
3. **Surface Damage (Scratches, Peeling):**
- *Cause:* Mechanical damage or wear.
- *Solution:* Replace the damaged bearing.
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### **Abnormal Temperature Rise**
**Causes and Solutions:**
1. **Excessive Lubricant:**
- *Cause:* Over-lubrication leading to increased friction.
- *Solution:* Reduce lubricant amount and use a less viscous grease if necessary.
2. **Insufficient or Inappropriate Lubrication:**
- *Cause:* Poor lubricant quality or lack of lubricant.
- *Solution:* Refill with the correct lubricant type.
3. **Abnormal Load Conditions:**
- *Cause:* Overloading or improper fit.
- *Solution:* Adjust load, check bearing clearance, and ensure correct housing alignment.
4. **Poor Equipment Precision:**
- *Cause:* Inaccurate machining of shafts or housing.
- *Solution:* Improve manufacturing accuracy and use better equipment.
5. **Cooperation Surface Creep or Seal Issues:**
- *Cause:* Excessive friction or misalignment.
- *Solution:* Replace the bearing, adjust the fit, and modify the sealing system.
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### **Large Oscillation (Axial Bounce)**
**Causes and Solutions:**
1. **Deformation After Carburizing:**
- *Cause:* Structural changes in the bearing.
- *Solution:* Replace the bearing and pay attention to installation procedures.
2. **Surface Peeling:**
- *Cause:* Fatigue or wear.
- *Solution:* Replace the bearing promptly.
3. **Poor Equipment Alignment:**
- *Cause:* Misaligned shafts or housings.
- *Solution:* Ensure proper alignment of all components.
4. **Foreign Matter Intrusion:**
- *Cause:* Contaminants entering the bearing.
- *Solution:* Replace the bearing and improve sealing.
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### **Excessive Lubricant Leakage and Discoloration**
**Causes and Solutions:**
- **Excess Lubricant:**
- *Cause:* Overfilling or incorrect viscosity.
- *Solution:* Adjust lubricant levels and select a more suitable type.
- **Contamination from Wear Debris:**
- *Cause:* Particles mixing with the lubricant.
- *Solution:* Clean the system, replace the lubricant, and inspect bearings regularly.
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### **Related Bearing Knowledge**
- KOYO bearing inspection and temperature monitoring
- INA bearing suffix interpretation
- Agricultural motor bearing overheating solutions
- Bearing heat treatment techniques and equipment
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**Recommended Reading:**
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