Imported SKF Bearing Damage Disposal Methods
Source: Bearing Network | Date: January 18, 2013
When dealing with imported SKF bearings, it's essential to understand the various types of damage that can occur and how to properly handle them. Here are some common issues and their corresponding solutions: **False Brinell Indentation Damage:** This type of damage occurs when there is vibration during operation, causing the rolling elements and raceway to develop small indentations due to oscillation. The marks resemble those of a Brinell indentation. **Cause:** During transportation, the bearing may experience minor vibrations or shaking, especially when stationary. **Solution:** Secure the shaft and housing during transport. Separate the inner and outer rings if possible, apply pre-load to reduce movement, and use an appropriate lubricant. **Creep Damage:** Creep refers to the development of a gap between the mating surfaces of the bearing. It often results in a shiny or dark surface due to relative sliding. In some cases, there may be signs of scoring or wear. **Cause:** Improper fit (either too loose or too tight), or failure to properly tighten the sleeve. **Solution:** Check the interference fit, perform a rotation stop test, and ensure the adapter sleeve is tightened correctly. Also, verify the accuracy of the shaft and housing, apply axial preload, and consider bonding the mating surfaces. **Burn Damage:** During operation, the raceway, rolling elements, and cage may become overheated, leading to discoloration, softening, welding, or even complete failure. **Cause:** Poor lubrication, excessive load or preloading, high speed, insufficient clearance, contamination by water or foreign particles, poor shaft and housing alignment, or significant shaft deflection. **Solution:** Improve lubrication methods and select the right lubricant. Ensure correct bearing selection, proper clearance, and preloading. Enhance sealing systems and check the accuracy of the shaft and housing. **Electro-Erosion Damage:** This happens when current flows through the bearing’s rolling elements and raceways, creating sparks across a thin oil film. The result is melted or raised areas on the surface. **Cause:** A potential difference exists between the inner and outer rings. **Solution:** Avoid allowing current to pass through the bearing by insulating it or using a separate circuit path. **Rusting and Corrosion Damage:** Corrosion can manifest as pitting, rusting on the outer surface, or general corrosion. **Cause:** Exposure to moisture, corrosive substances (like paint or gas), improper lubricants, condensation, storage in humid environments, or poor packaging during transport. **Solution:** Improve sealing, use proper lubrication techniques, implement anti-rust measures when not in use, and ensure suitable storage conditions. **Equipment Damage:** This involves linear flaws appearing on the raceway and rolling surfaces during operation or disassembly. **Cause:** Skew or misalignment during disassembly, or impact loads applied during removal. **Solution:** Use proper tools like a press to avoid impact, and ensure equipment is aligned correctly. **Discoloration Damage:** The raceway and rolling elements may change color due to heat generated from poor lubrication or the interaction between the bearing and lubricant. **Cause:** Inadequate lubrication leads to hot spots and thermal degradation. **Solution:** Improve lubrication practices and ensure the correct application method. --- **Related Bearing Knowledge:** - Selection of Roller Bearings - Oscillation Inspection of Rolling Bearings - Bearing Size Selection - Imported Bearings Specifications - Six Major Disadvantages of Miniature Bearings - Overview and Usage Guide for Miniature Bearings For more information, visit [China Bearing Network](http://). Previous: Bearing Material Without Lubrication (2) Next: Bearing Box Floating Labyrinth Oil Seal
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