What is a common cause of machine failure associated with bearing issues?

A common cause of machine failure associated with bearing issues is a lack of lubrication. Bearings require an appropriate amount of lubrication to reduce friction and wear between moving parts. Without sufficient lubrication, the surfaces of the bearing can make direct contact, leading to increased heat generation and wear, potentially resulting in bearing seizing, overheating, or premature failure. Proper lubrication also helps remove contaminants and facilitate the smooth operation of bearing components.

In contrast, other options may contribute to issues in a bearing but are not as universally recognized as primary causes of failure specifically related to lubrication. Over-tightening can lead to bearing damage by creating excessive pressure and distorting bearing surfaces, while under-sizing can result in bearing overload and inadequate support. Improper alignment can cause uneven wear and additional stress on the bearings, leading to their malfunction. However, the fundamental need for lubrication remains a critical aspect of ensuring bearing longevity and performance.