Posted 12/15/2015 22:39 (#4963183 - in reply to #4963125) Subject: RE: Why do drills make a triangle hole instead of round in thin sheetmetal
w/c Illinois
I seem to recall from high school metal shop class that a twist bit never makes a perfectly round hole in any thickness of metal. If you want a near perfect hole you have to use a reamer.
Why do drills make a triangle hole instead of round in thin sheetmetal
