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Message No. 18365, Started by flywelder on 01/19/07

I have an electric  chop saw. The brush on  one side of comutator  has worn out. Manufacturer no longer has brushes available for this model ( naturally)  So, I replaced the brush with one I shaved down. I purchased the replacement brush from a automotive Starter rebuild shop.

Saw worked fine for two weeks...there was much arcing when the motor ran from this brush. I would like to learn why?

Now the saw motor quit. ???

So I ask you, is there a difference in  brush material  for a DC starter and that used in a electric motor?

Also has any one a source for replacment brushes for AC motors 120 volt for a chop saw?  The saw was built by Black and Decker, and is their professional line.

 I await your replies.

 Flywelder

1/19/07 

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Follow-up Messages (4)
we are the professional carbon brush manufacturer,pls check out website htt...
No. 21773, Posted by asiacarbonbrush on 06/13/12, 02:04 PST.
Large brushes are desired for a larger brush contact area to maximize motor...
No. 21231, Posted by krislou80 on 10/08/10, 23:15 PST.
Yes, the brushes will need to be mated or seated the way cessna described.&...
No. 18375, Posted by javabear on 01/28/07, 00:05 PST.
FLYWELDER:  I am a mechanical engineer who has had a little expierienc...
No. 18370, Posted by cessna on 01/22/07, 18:13 PST.
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