Today I was turning a 12" walnut burl bowl on my lathe and while I was working to hollow out the center it exploded. A large chunk got me on the arm and I thought it was broke for a few seconds. I still have only found 1/4 of the bowl and it had paint on it from the ceiling.
I was using my 12-20 Jet lathe and I don't know what the RPM was but I now think it might have been to high.
I've found that it's good to take a little bit at a time and let it sit for a day between. The internal stresses can be released rather suddenly if you do it in one sitting. This also gives the outside a chance to dry a little at a time reducing the risk of a crack.
Been there, done that. Burls, spalted pieces . . . gotta watch for this sort of thing. If the RPMs were too high, maybe the hold you had on it wasn't good enough for the given RPMs.
WAHHHHHH!
I guess that I've dodged that bullet (so far).
Be safe, not scared.
Bill
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