Proper electric motor balancing and precision machine work will extend the life of your motor, particularly the bearing life. So ask yourself this question, “How much could one extra year of run life on every motor repaired save you?”
Answer: 14% if you are averaging 6 years, which could add up to thousands.
Electric motor balancing and precision machine work is one of the three major components of EECO’s motor repair program. Precision, multi-point fits are taken with bore gauges. Rotors are precision balanced in machines certified by procedures defined in ISO 1940.
In a test conducted in our shop, the ISO electric motor balancing method reduced undue bearing force by 49% over the NEMA method.
Over 40% of motor failures are bearing related. The most prominent causes of the bearing failure include:
- Fitting and mount
- Improper lubrication
There is an opportunity to extend bearing life on every motor repair job by employing better practices developed from the best available standards. Unfortunately, many shops have cut-back on these practices (or eliminated them) in order to reduce the repair costs.
4 key areas for adding life to bearings during motor repairs
Precision bore gauges should be used to record multi-point measurements of all bearing fits. Many shops are still using inside micrometers, or they take too few measurements, which leads to inaccurate measurements.
Precision electric motor balancing:
Rotors should be balanced in accordance with procedures defined in ISO 1940. This yields a much better result than the NEMA method, which is still used by many shops. In a test conducted in our shop, the ISO method reduced undue bearing force by 49% over the NEMA method. Final balance results should be recorded in units of actual force.
Installation should be performed in a clean environment by following a written procedure. Professional installation equipment, such as those provided by SKF, will prevent damage, such as overheating or magnetizing. All bearing data, before and after, should be recorded for future reference.
Contamination control is improved by limiting exposure to lubricated areas and replacing items that can store contaminants, such as grease piping and nipples. Lubricants used should be visible on the motor and documented for reference.
EECO’s motor repair facilities:
EECO’s motor repair facilities are available to you 24 hours a day; 7 days a week. Schedule your rush motor repairs and rewinds round-the-clock by calling 800.993.3326 or emailing our motor team at firstname.lastname@example.org. You can also request field electric motor balancing, learn more about balancing and repair standards, or request a tour of our facilities.
Download EECO’s Motor Repair Service Card.