If the bearing is too hot to the touch, that might be an indication that it is malfunctioning, which, if left unattended, can halt the operation of the motor. Make a comparison between the temperature of normally operating bearings and hot bearings. Check the temperature of the bearing housing or surface using a thermometer or an electronic temperature sensing device. On motors that are heavily used, it is imperative to check the bearings daily using an infrared scanner or a stethoscope. Maintenance tasks will depend on the type of bearings used, motor application and operating environment. Typical bearing problems include insufficient lubrication, worn bearings, hot motor, excessive loading, harsh external environments, or replacement with the wrong bearing type. One of the most common causes of electric motor failures is bearing failure. The checklist should also cover inspection of bearings. Moreover, your employees should inspect the motor mount, rotor, stator, and the belts. Brush sparking usually causes the commutator to be blackened and rough. A commutator in good condition is expected to have a smooth appearance with no scratches or grooves. If these two elements are excessively worn, they will not work properly and should be changed immediately.ĭuring the maintenance process, the operator must check the type, hardness, conductivity, and spring pressure of the brushes. The brushes and commutators of an electric motor are prone to wear and tear and, therefore, it is important for your workforce to inspect them for excessive wear.

Additionally, a checklist will consist of maintenance that will cover tasks such as cleaning, lubrication, inspections, and testing in order to ensure the motor is in good working condition at all times. The key to reliable operation of motors is having a checklist in place in the form of a preventive maintenance program.Ī checklist will make it possible for your employees to know exactly what needs to be examined, corrected or replaced, if need be. An electric motor that is well cared for will last for years and provide you with ongoing reliability. Tags: electric motors, preventative maintenance, TroubleshootingĪn electric motor operates in a simple and reliable manner, and this can sometimes lead to overlooking the day-to-day maintenance.

Electric motor winding data sheet