Engineers Black Book
Ever since I went to trade school all those years ago, my reference book that I use in the shop is my "Machinery's Handbook" Nineteenth Edition. In my shop this book is the standard that all other machine shop reference books are judged by, and any machinist will attest to that.
Over the years I have added various other reference books to my shop library, however none of these other reference books have measured up untill now.
Lately, I was in one of the machine shop supply outlets that I purchase from, and noticed a reference book with the title "Engineers Black Book..
Inside there’s a wealth of practical information like conversion tables, hardening and tempering information, engineering drawing standards, tolerances, bolt and nut standards, and keys and keyway standards. You’ll also find the weights of metals, tapping drill sizes, lubricants/coolants for cutting tools, speeds and feeds for twist drills, G codes, and lots, lots more.
I have to say that this little black book has become my go to book lately. Try it, you'll like it.