Posted 12/16/2015 04:27 (#4963395 - in reply to #4963125) Subject: RE: Why do drills make a triangle hole instead of round in thin sheetmetal
michigan
I am a tool and die maker by trade and there are special ground drill bits for sheet metal, they have a undersize point on them for a pilot and then cut the the full diameter with a an end that is similar to an end mill. Another option is a step drill or some manufactures call it a uni-bit.
Why do drills make a triangle hole instead of round in thin sheetmetal
