I am still struggling with making an encoder adaptor that would go into the top of my spindle (spindle is hollow, with a 26mm hole), and have a 3/8" shaft protruding on top to mount the encoder disk.
After a few things that did not work, I am settling on simply making this adaptor out of 12L14. It should be easy to make on a lathe. I am thinking how to avoid making it "expand" but just stay in place without expanding.
Whet I would like, I think, is make it fit the spindle precisely, yet without any significant force involved (that is, not press or interference fit), but use some weak glue to hold it in place. This is so that I would pull it out easily when necessary.
Would anyone have any suggestions as to the glue.