Reply by Lazyman

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Posted on tenon broke

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6970 posts in 2463 days

#1 posted 03-10-2021 03:18 AM

Karda, which part of the base was bottomed out against the chuck, the bottom of the tenon (in other words that part that broke off) or the bottom of the bowl around the tenon? The bottom of the tenon itself should not be against the chuck. If it was, that is probably why it broke off. Also, from the picture it looks to me that the area around the tenon that should be registered against the end of the jaws isn’t flat enough. The jaws need to make contact with the bottom of the bowl (not just the sides of the tenon) and it must be flush. Basically, it should fit like this:

It doesn’t have to have a step from the shoulder to the bowl like it shows, but the shoulder does need to be flat against the jaws and the tenon itself should not bottom out. Maybe yours was and it is just hard to tell from the picture.

-- Nathan, TX -- Hire the lazy man. He may not do as much work but that's because he will find a better way.

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