Using an End Mill to "Drill" holes
Feb 27, 2006· I use end mills for sizing holes very often. For instance: A hole pattern that calls for a counterbore. Drill the holes, locate a proper size end mill for the cbore (preferably a four flute) and have at it. Multi flute end mills are your friends but, they must be center cutting unless a pilot hole is in place. Respectfully, Zeke