There are many varieties and sizes of electric motors. The choice of lubricant for general motors depends on the type of bearing, number of revolutions, temperature, and load. Small motors commonly used sliding bearings, in the bearing seat with oil storage tank or oil pool using oil ring and oil chain, throw oil ring in the sleeve with the use of lubricating oil circulation lubrication, also useful for lubricating oil, to maintain the durability of the lubricating oil Life is 20000-4000H. Medium-sized motors are mostly used for rolling bearings (with an inner diameter of 25 mm or more), lubricated with grease, and are usually filled with grease at one time (about 1/2 of the grease is loaded into the bearing, and then cleaned and replaced after 1 year). Rolling or sliding bearings may be used in large motors. Both types of lubricants may be used. Generally, sliding bearings are lubricated with oil, and rolling bearings are lubricated with grease. The bearing temperature of the motor should generally be controlled between 65-80, and the alloy sliding bearing is preferably lower than 65.
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