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Anonymous Poster

Measurement of air gap

04/28/2009 8:43 AM

Dear all,

Kindly throw some light on the following topic:

" how to measure the air gap of a motor at site"

The air gap is usually 3 to 5 mm

Regards,

Prashanth

India
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harry potter
Power-User

Join Date: Nov 2008
Location: India
Posts: 333
Good Answers: 6
#1

Re: Measurement of air gap

04/28/2009 9:46 AM

dear ,

just by measuring ID OF STATOR - OD of rotor. = air gap of motor.

You may measure with the micro meter.

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msamad
Guru

Join Date: Feb 2009
Location: Houston, USA
Posts: 946
Good Answers: 244
#2
In reply to #1

Re: Measurement of air gap

04/28/2009 6:48 PM

Correction:

(ID OF STATOR - OD of rotor.) / 2 = air gap of motor.

-MS

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Anonymous Poster
#3
In reply to #2

Re: Measurement of air gap

04/28/2009 9:05 PM

What is of importance is not only the air gap, but rather the concentricity of the air gap. It is fine to measure OD and ID as correctly stated by msamad, but if with the rotor installed all or most of the gap is in one direction you will have serious vibration problems.
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