ABSTRACT
Rolling bearings are mechanical components that transmit loads from rotating to stationary machine elements with high precision and extremely low energy loss. Linear motion rolling bearings serve the same purpose in the transmission of linear movements. Rolling bearings are one of the most commonly used machine elements second only to nuts and bolts. It is estimated that approximately 60 billion rolling element bearings are in use today. ˜e rolling element bearings are a relative newcomer, introduced at the end of the nineteenth century, and since then they have become the prominent method of supporting rotating sha§s under load. ˜eir continuing success is due to improvements in the quality of steel, the quality of the contacting surfaces with very low roughness that usually allows for eµective lubrication, and the improvements in design, all of which are essential for the longevity of the bearings.
