Finger Lakes Live Steamers, Inc.

Handy Reference Charts for the Machinist

These charts have been compiled by Don Jermyn and Tim Guenther.  Of course this info is contained in Machinery's Handbook and other reference volumes, but it is very handy to have the most common information right at you fingertips.  Feel free to print these charts and hang them up in your shop or keep them in a folder in a convenient location.

USA Drill Sizes  Number, Letter, and fractional with their decimal equivalents.

USA Threads   National Fine and Coarse, Basic Major Diameter, and Tap Drill Size.

Counter Bored Holes  for standard USA Socket Head Cap Screws.

Speed Chart   for Lathes and Mills, for most common Materials.