2018-09-262018-09-262018http://hdl.handle.net/20.500.12091/333In motors, parts move against each other, causing friction that converts energy into heat. Contact between moving surfaces also wears away those surfaces. Worn parts could lead to lower efficiency and degradation of the motor. Lubricating oil creates a separating film between surfaces of adjacent moving parts.en-USMotorsBTA SkillsArticle