Quote Originally Posted by Geof View Post
Rubbish! A correctly sharpened drill will produce a hole within less than 0.005" larger than the drill size. It is possible to make a drill cut oversize by grinding the two cutting edges unevenly but when a drill is correctly sharpened it cuts very close to size.
It seem obvious that you are a Machinist and it somehow seems that you are trying to teach a cow to dive. He is not going to take your word or explanation for that matter so why try?