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How to Determine if Angular Contact Precision Bearings Can Continue in Service

2025-05-28

Angular contact precision bearings are vital for high-performance machinery. To assess whether they can remain in service, follow this inspection process:

1. Visual Inspection

Check for visible signs of damage:

Cracks or chips on rings, rollers, or cages — replace immediately.
Component separation — indicates failure.
Surface damage like deep scratches, dents, or brinelling (indentations).
Corrosion or pitting — leads to rapid wear.
Cage wear — loose rivets or broken sections reduce stability.
Seal damage — allows contamination and grease loss in sealed bearings.

2. Operational Testing

Test bearing performance during operation:

Smooth rotation: Any resistance or grinding suggests damage or contamination.
Noise: Unusual sounds (e.g., clicking, screeching) may indicate wear or misalignment.
Temperature: Overheating (e.g., >60°C) often signals poor lubrication, friction, or overload.

3. Advanced Diagnostics

Use tools for deeper analysis:

Vibration analysis: Detects early-stage faults such as spalling or fatigue.
Oil film testing: Evaluates lubricant quality and wear trends.
Fiber optic sensors: Monitor real-time wear and internal conditions in precision systems.

4. Usage and Environment Review

Consider historical and environmental factors:

Load and speed history: Heavy use shortens lifespan.
Operating conditions: Dust, moisture, and temperature affect performance.
Maintenance records: Frequent issues may point to system problems.

Maintenance Tips

Regular inspections: Monthly checks for heavy-use systems.
Proper lubrication: Use correct grease type and quantity.
Preload adjustment: Maintain proper stiffness and eliminate clearance.

Conclusion

To decide if angular contact bearings are still usable, combine visual checks, functional tests, and diagnostics. Early detection of damage prevents breakdowns and extends machine life. For critical applications, work with certified suppliers for reliable replacements and support.

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