Gil HASH wrote:
Hello for all metalworking men ;-)
The newbie's strange question of the day :
in many web links some lengths are in inch and there is no problem to
convert them in millimeters (for me)
but some dimensions are notified by a number - so I've seen a drill bit with
#45 or #57
Can you give me the way to calculate them (in inch) ?


http://en.wikipedia.org/wiki/Drill_bit_sizes