V3 morse taper#2 8tpi with half inch #13 threaded rod

#2 arbor with 8tpi with inserted 1/2 inch #13 threaded rod for extra strength.
PRINT AT 100% infill

I am in no way responsible for your safety, uses with your own judgment.

Print threads down
insert the threaded rod from bottom up on the 8tpi thread side.
3/4 of the way stop and add epoxy or supper glue and thread the rest of the way, Cut off excess rod.