Friend borrowed my 7/8 drill yesterday.Tried to drill a 3/4 hole in a trailer draw bar to 7/8.Drill snapped off an inch back from the point.I am against step drilling and have said so many times on this forum.That drill was HS steel and had drilled many holes for me and stayed sharp thru many drillings.If you look at the break you will be surprised at how little steel is in a big drill web.If I knew what the drill was going to be used for I would have said no.I have a reprint of an Air craft book that advocates step drilling and another book that appears to be a word for word copy of the older book on step drilling.Those books are wrong.Friend offered to replace the drill but I said no.Just turned 75 and my shop work is winding down.Have not done any welding this summer.
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