Drilling larger holes without harming yourself

Ever wind yourself up in the electric drill when drilling a big (over 1/2") hole in metal? I sure did when I had to drill out some 5/8"
holes out to 3/4" in the underside of my broken tractor.
I just put up a page that deals with this issue:
http://www.spaco.org/Blacksmithing/Bighole/Bighole.htm
Pete Stanaitis ------------------
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