On Thu, 10 Dec 2015 09:37:40 -0900
Kevin Miller wrote:

Often, when people turn things like boxes, the stub left over after
parting off makes a good jam fit chuck. In that case you would cut
the tenon on the stub so that the piece fits over it, rather than
into a hole.

makes sense i will have to try it out

i did something sort of like this out of need

i made a spindle with a morse taper on both ends
one jammed into the headstock the other i put a piece of pvc pipe over
and turned a length of pvc pipe

my tailstock needed no mods and worked as is into the other pvc end

i use this same setup just to sand copper pipe on the lathe to a nice shine