When rotating equipment is out of balance it will vibrate and it is important to determine what is causing the vibration.  An out of balance will always cause a vibration, but a vibration is not always caused by an out of balance. 

A good repair facility will always dynamically balance rotating equipment that is to be repaired and if there is a vibration in the motor during final test, the source will be identified and the problem rectified. 

When talking about out of balance, we are really talking about the consequences of an out of balance, which is vibration and bearing failures.  The most common measurements of vibration are displacement and velocity.  Displacement is the distance traveled by the equipment vibrating and is measured in mils.  Velocity is the speed of the vibration and is measured in inches per second. 

When a motor is returned from a reputable repair facility you can be assured that it was dynamically balanced and that the motor did not exceed acceptable vibration levels before shipment.  What could be causing the vibration?  Some common causes of vibration are as follows:

Today’s vibration analysis equipment can narrow down and in some cases identify the root cause of the vibration.  Vibration is destructive and, in the interests of reliability, it must be eliminated.

 Magneto Electric can customize a predictive maintenance program for you!