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Is it a brush-type "universal" motor, or a split-phase motor? I had a Sears radial arm saw some years ago that had a brush-type motor, basically just a big SkilSaw. If your's is like that, it would just have 2 field coils, and be relatively easy to rewind, if you wanted to tackle it. You need "magnet wire". McMaster has it, or a Google seach will turn up tons of other sources. Take note of the wire gauge, number of windings, and direction it's wound, and, taking your time, get the new windings in place as much like the originals as you can. When you're done, make the connections, then spray several coats of electrical varnish on the new windings. If it is a split-phase motor, it will be tougher to do, but it is still possbile. I have saved some special motors that way, for my own use, that would be tough to get replacements for. If you have the time and patience, you can probably do it yourself. Likely, though, having it done at a motor shop would be more $$$ than the saw is worth. Incidently, have you checked the Sears parts website, to see if new windings are available? Even if they are, I doubt if that would be practical, as Sears parts are usually outrageously expensive.
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