Building A Boring Head — Part 4December 18, 2011
Well, chalk another one up to the scrap bin.
It certainly looks nice, but it’s wrong.
I finished cutting the threads, and when checking them with a 3/4 – 16 bolt, noticed that it was loose and seated at an angle. Not good. But at least I figured out what I did wrong. Earlier, I bored out the thread’s minor diameter to 0.7031″. That’s wrong. It should have been 0.6875″. That extra 0.015″ makes the fit sloppy, and causes the bolt to seat at an angle. So this one’s a failure. Time to start over.This entry was posted in Tools. Bookmark the permalink.