I wonder if anyone has made a sphere jig that rotates in the vertical rather than the horizontal position?
I have a home made one made that rotates parallel to the lathe bed. It scrapes rather than cuts. I use a 1/8" high speed steel cutter but sure get a lot of tear out that requires sanding.
I know, I know, there will be lots of you who say I shouldn't use a jig at all but with the hollow 2 piece spheres I like to make I really need fine tool control and am not quite able to get a wall thickness close to 1/16 by hand.
It would seem to me that if the bit were riding the bevel I should be able to get a better cut.
There is at least one commercially available model, I have a threader made by the same company and it works fine but really don't want to spend the extra $$ and anyway I truly like to make jigs for my lathe.
Here's a unfinished globe to give some sense of what I am making. Sorry about the photo but I have temporarily lost my photo booth/set-up.
sphere.jpg