What is a common failure mode for bearings?

Fatigue failure is a common failure mode for bearings, primarily due to the cyclic loading and unloading that they experience during operation. As the bearing rotates, there are areas within the material that continuously bear the load. Over time, these repeated stresses can cause microscopic cracks to form. Eventually, these cracks grow and can lead to spalling, which is when pieces of material flake off the surface of the bearing. This failure mode is particularly significant because it often occurs without warning, leading to sudden bearing failure.

In the context of bearings, fatigue failure can be influenced by several factors, including the design of the bearing, the quality of the lubrication, load conditions, and the material properties. Understanding this aspect of bearing operation helps in preventively maintaining equipment, ensuring reliability and reducing downtime in mechanical systems.