What is usually the cause of bearing trouble?

The answer indicating the temperature of oil being too high as a cause of bearing trouble is valid because excessive oil temperature can lead to numerous detrimental effects on bearing performance and longevity. High oil temperatures often result in a decrease in the lubricating properties of the oil, which can cause increased friction and wear between moving parts. When the oil overheats, it can also break down chemically, losing its viscosity and becoming less effective at reducing friction. This can lead to accelerated wear, the risk of bearing failure, and ultimately, equipment downtime.

While other factors like electrical issues, incorrect lubrication, and poor material quality can also contribute to bearing problems, the temperature of the oil is a particularly critical aspect. It directly influences the lubrication quality and the overall operation of the bearings. Maintaining proper oil temperature is essential for optimal performance and to help ensure the reliability and efficiency of machinery.