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After replacing the brushes in my old Rockwell belt sander there is excessive arcing between the brushes and the oommutator and the unit doesn't come up to full speed.

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Did you dress the brushes to the contour of the commutator?

You wrap the commutator with fine sandpaper and rotate under the brushes till the curve conforms.

If this does not reduce the arcing, then you may have an armature with a bad winding.

Posted on Sep 30, 2009

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4_24_2012_7_15_35_am.jpg

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