What is a common sign that a bearing is failing?

Excessive heat generation is a common sign that a bearing is failing. When a bearing starts to wear out or become damaged, the friction between its moving parts increases. This friction leads to a rise in temperature as the bearing operates. If the heat generated is significant, it can indicate improper lubrication, contamination, or misalignment, all of which can contribute to premature bearing failure.

Monitoring the temperature of bearings during operation is essential for maintenance practices, as an abnormal increase in temperature can serve as a warning sign that immediate attention is needed to prevent further damage or catastrophic failure.