The other day I turned a small vessel and I snapped the tenon while I was hollowing. Reason being, I had turned the base down before hollowing (mistake #1) and the tennon was about 1" diameter. Then I started hollowing and the torque of the cut just snapped it off.
I put it on the work bench for the past couple days and I was going to throw it in the wood pile but I decided to try something. I still had the part that was in the chuck so i put it back in and leveled the surface. Then I took it over to the drill press and put a 1" hole thru it with a forestner bit.
See Pic #1 - I then used some epoxy I had laying around to coat the tennon and on the inside of the hole.
See Pic #2 - then put one inside the other and put it back in the chuck and used the tailstock to clamp it.
Now ill let it dry good and see if I can recut it and rehollow it without it comming apart again................