Common Causes of Failure and Application Considerations for NSK Imported Bearings

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NSK imported bearings are widely used in various mechanical systems due to their high performance and reliability. However, like any mechanical component, they can experience failure under certain conditions. Understanding the common causes of failure and proper application practices is essential to ensure long-lasting performance. **1. Fatigue Failure** Fatigue failure occurs when bearings are subjected to repeated or alternating stresses over time. This type of failure typically begins with micro-cracks forming beneath the surface due to shear stress. These cracks gradually propagate and eventually lead to spalling or flaking on the bearing's surface. If left unchecked, the damage can deepen and result in complete failure. Fatigue is one of the most common failure modes, especially in applications involving continuous motion and heavy loads. **2. Wear and Degradation** Wear is a major cause of bearing degradation, particularly when there is relative motion between surfaces. This can be caused by abrasive particles, improper lubrication, or contamination. Abrasive wear happens when hard particles or foreign matter get trapped between moving parts, causing furrow-like damage. Adhesive wear, on the other hand, occurs when metal surfaces come into direct contact under poor lubrication conditions, leading to welding and tearing of the material. Both types of wear can reduce precision, increase noise, and ultimately lead to bearing failure if not addressed. **3. Cracking and Overloading** Cracking failures often result from excessive load, impact, or internal defects such as voids, inclusions, or improper heat treatment. When the applied load exceeds the bearing’s strength limit, it can cause sudden cracking, known as overload failure. Additionally, manufacturing flaws such as shrinkage cavities or residual stresses can contribute to cracking during operation. Proper quality control during production and careful handling during installation are crucial to preventing this type of failure. **4. Clearance Changes** Changes in the original clearance of a bearing can also lead to failure. External factors such as misalignment, thermal expansion, or sudden overloads can alter the fit between the bearing and its housing. Internal factors like residual austenite or unstable stress can also affect the clearance, reducing accuracy and potentially causing "locking" or "biting." Maintaining proper alignment and using appropriate installation tools can help prevent these issues. **Best Practices for NSK Bearings** - Always use proper tools for installation; avoid hammering or forcing the bearing into place. - Ensure the surrounding environment is clean to prevent dust and contaminants from entering the bearing. - Use high-quality lubricants and maintain regular maintenance schedules. - Avoid direct contact with bare hands when handling bearings to prevent rust and contamination. By following these guidelines, users can significantly extend the life of NSK bearings and improve overall system performance. Special operating conditions, such as light loads or effective lubrication, can further enhance bearing lifespan and efficiency. **Related Articles:** - SKF Bearing Load Calculation Methods - Characteristics of Thrust Spherical Roller Bearings - Sliding Bearing Types - High Carbon Chromium Bearing Steel Trends - FAG High Speed Bearing Lubrication Techniques This article was originally published on China Bearing Network. For more information, visit [http://www.chinabearing.net](http://www.chinabearing.net). Previous: Analysis of Bearing Clearance and Matching Instruments Next: Features of Different Plastic Bearing Varieties

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