Don't run the boring bar into the chuck jaws on the end of the hole

The boring bar equivalent of the arc of shame, where you run the compound into a spinning chuck - you are not the first, won't be the last.

Thanks for starting my day off with a smile, Shawn!
 
I, for one, would never be so careless as to commit either of the rookie mishaps that you two guys described. I'm much more diligent than that. But, let’s NOT talk about running the boring bar past the inboard end of the work, past the spacer/standoffs (untouched) and into the spindle flange opening (not untouched). A verboten subject that one! Don’t anyone EVER bring it up again!

Tom
 
To be fair... I only kissed the jaw. One impact, under manual power. Just .001" past the mark....
Odd shaped plate in the 4 jaw boring an opening. Didn't notice one of the jaws was just peeking through the edge of my hole.
 
My last blunder I can recall was similar, was a threading tool that held the triangle shaped insert on edge. TNMA I recall? Well anyway threading up to a shoulder, cutting a 1"-8 thread, yes there was a thread relief, but running at 160 RPM, didn't give you much time to disengage the half nuts and wam! Pushed the work piece up into the chuck and side swiped the tool and pretty much wiped the insert off and destroyed the tool holder. Had to buy another one at about $100 a pop! This happen on a 16" Axelson with a CA size tool post and over 7-1/2 HP doing the damage!
 
Another goof I did was run a 3/4" diameter end mill into the work piece, rapidly hand cranking the table, and bam! Snap off that end mill like it was nothing. Old heavy 9-J Gorton mill didn't miss a beat and kept on running!
 
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