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Craftsman 10" table saw losing power

Was cutting 1/2" plywood today on a saw that doesn't get used much. Saw lost power, started to sell a bit, I can see sparking in the motor (arcing?). Any idea what's going on?
Thx
Chris

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  • chrisdesaute Jan 29, 2009

    Thanks for the feedback. The model is a 113.221740, craftsman 10", I'm estimating 10 yrs old or more. Was given to me by a friend, he used a lot, I use very infrequently, but plan to do more now that I have my shop set up.

    I had been cutting 1/2" and 3/4" plywood with no problem. Then while cutting a 1/2" piece (all pieces were roughly 18" square), I noticed a loss of power, and after a while a (presumably) electrical smell. I noticed the arcing, which as you say, maybe has always been there (I never looked before). I blew out the motor with compressed air, checked the blade by hand (seemed to rotate freely). No obvious problems, ran no better after blowing out the motor.

    The blade is old, I likely need to replace. When I say it's not usedt often I mean this thing sat for months, then I made about 10 cuts on it over the course of two days.

    I fired it up again the other day, and everything seemed ok again, I did not cut anything. I have not yet pulled the motor. thx!


  • bchadra May 11, 2010

    How old/sharp is the blade? How often is this saw used? What type of motor is on the saw?

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Depending on how much "arcing" you see it could be a couple different items. First some arcing is normal and usually runs across the brush edge, but if it is a lot and goes around the armature then it could be a brush spring that collapsed or worse the armature has an open or damaged segment on the commutator, I would take the brushes out first and look at them (unplug tool first) the edge that rides on the comm should both look the same and the spring also. If you can see then turn the blade by hand and look at the comm thru the brush tube for a different looking bar on it. Let me know the model number and I will pull up a breakdown and see if I can help you further.

Posted on Jan 27, 2009

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