Perhaps in the hands of some people a drill cannot be sharpened to cut within about 0.002" of size but it can be done. And when you are talking drilled holes with standard HSS bits anyone who thinks they are reliably getting much better than that even with a new drill is dreaming.Originally Posted by The Puma Man
Yes it takes time and a drill grinder is faster but it is possible; I was doing it about 44 years ago.