Drill vs. End Mill? Some Basic Guidelines. DATRON Blog
Mar 17, 2017· End mills under become increasingly fragile, and subsequently cannot be run as aggressively, as a drill can be. If you need to make a very deep hole – in excess of 4x your hole diameter, choose the drill. Past this point, chip evacuation can become very difficult with an end mill, which will quickly wreck your tool and your part. ...