Quote Originally Posted by mklotz View Post
Another "out of the parts drawer" way to do this is to tap the arbor with a (tapered) pipe tap and then use a tapered pipe plug to expand it.
The pipe tap/plug trick would probably allow for greater range of expansion as well.

The 1/4" Swagelok ferule has far shorter and more aggressive taper than I desired, but a very quick solution that worked. I may eventually try to turn something with a much more gradual taper, that would expand (and support) a greater length of the arbor... Lots of ways to do this better than I did.

-EN