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Old 09-19-2014, 08:32 AM
  #11  
Larry3215
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Join Date: Mar 2006
Location: Gig Harbor, Wa USA
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If you do get around to testing motors, one thing you might notice is that even two "identical" motors can often show significant differences in kV.

This is something I found back when I was doing lots of motor testing. Its not all that unusual to find that even name brand motors vary significantly from one to another - 5% - 10% variations were not unusual.

The cheaper you go , the larger the variance can run into. Ive seen up to 50% or higher differences in cheap motors with the exact same model number, same winds, same everthing that were purchased at the same time from the same dealer.

In some cases it was obvious they were not wound the same way and in others it was hard to tell what it was. I'm assuming poor quality control and sloppy manufacturing techniques. It could also just be they slap any old label on a motor and sell it as what ever they want.
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