Tools, Sharpening and Power Machinery - skill saw armature arcing

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Boardlucysunny
09-12-09, 10:50 PM
I have replaced the brushes & sanded the armature for my worm drive skill saw but the arcing continues. Any advice?

chandler
09-13-09, 06:42 AM
Welcome to the forums! How much arcing? Arcing is normal in a brush armature situation. It may subside after the brushes are worn to the contour of the armature. If you are just seeing a little arcing when looking through the slits in the casing, it is normal. Abnormal armature to case arcing is not.
Boardlucysunny
09-13-09, 11:46 AM
Thanks for your reply. The arcing that the saw is having is excessive compared to my other skill saws. The armature has very little ware. I am wondering if replacing the whole armature would cure the problem or is there a problem with the windings also.

chandler
09-13-09, 05:44 PM
Are all your other saws worm drive? They are a different animal and have a lot more torque, thus more arcing.
Boardlucysunny
09-13-09, 09:17 PM
Yes, the other saws I have been comparing the arcing to are all worm drives. The one with the heavy arcing sounds like a stick welder. Have you ever heard of an armature being shorted out?
chandler
09-16-09, 05:09 PM
Yeah, the armature may look good, and clean up well, but it could be failing causing the arcing. If you have the option, I would replace the armature and the brushes as well, since they may have worn oddly on the old armature.
Boardlucysunny
09-20-09, 09:28 PM
Thanks for the info for the arcing armature.