Jul 9, 2010 #1 mielke Mechanical Joined Aug 24, 2009 Messages 181 Location US What is the recomended drill size for a 3/8-16 thread mill. For a normal tap i know its 5/16" and I know a thread mill has more wiggle room as for the drill hole size. So is it recomended to use the 5/16" hole or does anyone advise differently?
What is the recomended drill size for a 3/8-16 thread mill. For a normal tap i know its 5/16" and I know a thread mill has more wiggle room as for the drill hole size. So is it recomended to use the 5/16" hole or does anyone advise differently?
Jul 9, 2010 #2 mrainey Industrial Joined Jun 22, 2002 Messages 225 Location US The minor diameter is the same for thread mills and cut taps. A form tap wants a minor diameter, before tapping, of 0.344 Software For Metalworking http://closetolerancesoftware.com Upvote 0 Downvote
The minor diameter is the same for thread mills and cut taps. A form tap wants a minor diameter, before tapping, of 0.344 Software For Metalworking http://closetolerancesoftware.com