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#50 drill size in inches, for tapping 2-56

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  • Member since
    February 2010
  • 399 posts
#50 drill size in inches, for tapping 2-56
Posted by sandusky on Thursday, August 26, 2010 8:21 AM
My chart says use a #50 drill, haven't been able to find a cross-reference to size in inches. Any ideas? Mike
  • Member since
    August 2008
  • From: Kannapolis North Carolina
  • 86 posts
Posted by joe27 on Thursday, August 26, 2010 8:31 AM

Try this link and I think you'll find all you ever wanted to know.

http://www.upstatenymachinist.com/plans/drill_chart.pdf

Have fun, Joe

  • Member since
    February 2010
  • 399 posts
Posted by sandusky on Thursday, August 26, 2010 8:31 AM
Never mind, I figured out the search term wikipedia wanted....
  • Member since
    January 2004
  • From: Canada, eh?
  • 13,375 posts
Posted by doctorwayne on Thursday, August 26, 2010 9:26 AM

I have a metal decimal equivalent chart, from the Cleveland Twist Drill Company, on the wall of my workshop.  It lists sizes for fractional, wire (numbered) and letter size drills, along with tap drill sizes.  A #50 drill is about mid-way between a 1/16" and a 5/64", or, to be more precise, .0700".

Wayne

  • Member since
    April 2006
  • From: THE FAR, FAR REACHES OF THE WILD, WILD WEST!
  • 3,672 posts
Posted by R. T. POTEET on Thursday, August 26, 2010 1:36 PM

When I need this information I go to:

www.phy.mtu.edu/~suits/tapsizes.html

From the far, far reaches of the wild, wild west I am: rtpoteet

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