Motor Bearing System: A Comparison between Antifriction on Rolling-Element, Grease- or Oil-Based Lubricated Bearings for Process Applications

Numerous bearing systems are USED IN THE ELECTRIC MOTOR INDUSTRY. These systems even vary for a given manufacturer based on the motor size, type, enclosure, speed, and application. This article focuses on anti-friction rolling-element, grease- or oil-lubricated bearings used in vertical and horizontal motors. Although common in large motors, the hydrodynamic sleeve- and plate-type bearings are beyond the scope of this article. The primary focus will be on industrial applications that use more traditional types of bearings, lubricating systems, and enclosures. It is acknowledged that there are other specialized bearings in operation and other types of machinery where the principles of the article may have application.