I'm turning a small lidded box. the inside depth is about 3 5/8". From what I've seen and read, using a jam chuck seems to be the recommended way to secure and part off the bottom tenon. On my box, that tenon is about 3/8" deep. One recommendation is to make the tenon from the 3/8" tenon left in the chuck. I'm wondering if 3/8" is long enough to be a jam chuck support for the box base. I realize that the tail stock will provide support, but eventually I'll have to clean up the bottom. I guess I could get down to a small piece left and saw off the base from the tenon and clean up the bottom with sand paper/flexcut chisels. I also have sets of those chuck plates with the rubber feet that I could use. I was also wondering about spigot jaws on a chuck. I have those also. I'm using a jet 1221vs. This is my first box except for some treen mandrel boxes. The wood is spalted maple and it's fairly hard. I'm concerned about the project being secure on the lathe. Thanks for any comments.
Stan