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Drill Bit Size Conversion Chart

Posted: Thu Feb 24, 2011 11:39 pm
by Steve Mavronis
Hey, I was looking for a conversion chart to determine the proper drill bit size # for hole size needed and found this handy chart:

Machinist Drill Sizes, ANSI Drill Sizes, ISO Metric Drill Sizes
http://www.engineersedge.com/drill_sizes.htm

It has been a while and I couldn't remember the bit sizes I had used last time. Maybe this will be helpful to others as well.

Re: Drill Bit Size Conversion Chart

Posted: Fri Feb 25, 2011 3:59 am
by McSpunckle
Woah.

I just use digital calipers to measure things when I don't know what size to drill.