What does Electric Motor Maintenance Consist of?

In most commercial or industrial settings unscheduled downtime caused by a failed motor can result in a massive profit loss. The time spent repairing the equipment could cost thousands of dollars. For this reason it is imperative that you instate a preventative maintenance plan for any equipment that utilizes an electric motor. But what exactly does maintenance cover? A majority of it is inspecting certain parts for wear and tear to replace as necessary, but there is so much more to it.

Bearing inspections

Bearing failures are one of the most common things that cause electric motor failure. During an inspection a technician will check for misalignment, excessive load and proper lubrication. These inspections should be done frequently, as often as once per day.

Rotor inspections

As part of the rotor/stator inspection the technician will check the air gap between the rotor and stator using feeler gages. This should be done at least on an annual basis. This will help determine wear of the bearings.

Belt inspections

Belt tension and play should be checked to ensure that it is not at risk of snapping. Couplings should also be checked to ensure they tight and within tolerance.

Brush inspection

Brushes and commutators need to be regularly inspected for wear. If they need to be replaced it is crucial that the correct type, hardness and conductivity is used.

Motor Mount inspections

It is important to check motor mounts to ensure there is not excessive vibration due to loose mounts.

Vibration analysis

An annual vibration test should be conducted to ensure there is not excessive bearing play, part fatigue or other issues brought on by vibrations.


One of the most important things a technician will do during routine maintenance is ensure that the motor is properly lubricated.

If you are in need of electric motor maintenance in Denver or throughout the area get in touch with the experts at Industrial Motors & Machining. We conduct complete electric motor repair and electric motor sales in Denver. We service and sell all brands of motors. Give us a call today at (303) 872-5981 to learn more about our services or to inquire about a purchase.

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Written and Published By MORBiZ

Industrial Motors & Machining Blog

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