Very nice, thank you. Is that a page from "Basic Machines and How They Work"? (US Navy publication, 1965; repr. Dover, '71; cheap and invaluable to ignorami such as I.)
Last year I needed to renew a M36x3 anchor bolt, along about 60mm, just to remove some rust. One of the mechanics got to it. Come back to see a broken die and a destroyed bolt because the "mechanic" used a M36x2 die, for the complete length of the bolt. He didn't even stop although he saw something was wrong. 500€ went out the window that day, plus a few hairs of mine. The youth of today...
7 comments:
I know what to say when I snap one off....they taught me that!
Very nice, thank you. Is that a page from "Basic Machines and How They Work"? (US Navy publication, 1965; repr. Dover, '71; cheap and invaluable to ignorami such as I.)
Last year I needed to renew a M36x3 anchor bolt, along about 60mm, just to remove some rust. One of the mechanics got to it. Come back to see a broken die and a destroyed bolt because the "mechanic" used a M36x2 die, for the complete length of the bolt. He didn't even stop although he saw something was wrong. 500€ went out the window that day, plus a few hairs of mine. The youth of today...
A couple of decades ago, a co-worker handed me a bolt and said "I can't figure out if this is 5/16" coarse or fine. Any guesses?
rdguy
squints... 8mm!
Rats, very close! it's Tools and their uses, Prepared by the US Navy (Bureau of Naval Personnel)
(I added the credit, been lazy with that lately)
8mm it was. 1.25 mm pitch puts it almost exactly between 5/16 UNC and UNF, and .0025" diff on the nominal dia.
Impressed my co-worker that I could tell, though.
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