Certified Reliability Leader (CRL) Practice Test

What do bearing manufacturers identify as a primary cause of bearing failure?

1. Poor lubrication

2. Excessive heat

3. Incorrect installation

4. Overloading

The correct answer is: Poor lubrication

Poor lubrication is widely recognized as a primary cause of bearing failure by manufacturers. Adequate lubrication is crucial for reducing friction between the moving parts of bearings. When lubrication is insufficient or ineffective, it can lead to increased wear and tear on the bearing surfaces, resulting in issues such as overheating, surface fatigue, and ultimately premature failure. Additionally, proper lubrication helps to dissipate heat generated during operation, protects against corrosion, and assists in keeping contaminants away from the bearing surfaces. Without it, the lubrication film can break down, leading to metal-to-metal contact, which will significantly reduce the lifespan of the bearings. Therefore, the emphasis on poor lubrication aligns with reliability engineering principles that stress the importance of maintenance and care in bearing applications. This insight is critical for ensuring the longevity and performance of machinery in various operational conditions.