What are the reasons for linear bearing damage? (2)
The life of a rolling bearing is defined by the number of revolutions (or hours of work at a certain speed): a bearing within this life should have preliminary fatigue damage (flaking or defect) on any of its bearing rings or rolling elements. However, no matter in the laboratory test or in actual use, it can be clearly seen that the bearing has the same appearance under the same working conditions, but the actual life is very different. In addition, there are several different definitions of bearing "life", one of which is the so-called "working life", which means that the actual life that a bearing can reach before it is damaged is caused by wear and tear, and damage is usually not caused by fatigue, but Caused by wear, corrosion, seal damage, etc.
Why the bearing will wear and damage
Only some of the bearings are damaged in actual application.
There are many reasons for most of the bearing damage-beyond the originally estimated load, ineffective sealing, too small bearing clearance caused by tight fit, etc. Any of these factors has its own special type of damage and will leave special damage marks. Therefore, inspecting damaged bearings can find the possible causes in most cases. Generally speaking, one third of bearing damages are caused by fatigue damage, and the other third are caused by poor lubrication. One third of this is due to contamination entering the bearing or improper installation and treatment.
However, these forms of damage are also related to industry. For example, most of the pulp and paper industry is caused by poor lubrication or pollution caused by bearing damage rather than material fatigue.