A strange request.
I have a Craftsman 101.27440 (12X36) and a Grizzly G-1550 (Taiwan 9X19). Both machines have roller bearings in the headstock. I have NEVER welded any stock in the Grizzly, and pretty sure the Craftsman never has, the bearings are too "smooth".
I don't have any resistance readings, I strongly disapprove of any device that passes ANY (even micro-amps) current through the spindle bearings. Background: Industrial electrician with 50 plus years experience, Wang Field Engineer, BSEE, and a handful of other accolades.
Bill Hudson
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