Posted by Greg Coffin [172.68.34.73] on Saturday, November 09, 2019 at 19:07:44 :
In Reply to: Portable EDM remove broken drill bit posted by Andrew in MI [172.68.206.79] on Saturday, November 09, 2019 at 17:47:58 :
Old Lindsay Publications used to carry a book on how to make one of those. It used an arc welder and an engraving tool. It was a rather simple setup. I have a copy around here somewhere....
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