US Digital Shaft Encoder and VersaChassis Hex Shaft

[dradel]

Could epoxy a 1/4" shaft into the hole in the shaft and the use a piece of 1/4" id hose to attach the the encoder to the drive.

[Sohaib]

It'd be a lot easier if you told us what resources your team has access to. From the looks of it, it doesn't seem you have a lathe. Would you happen to have a 3D printer?

[tr6scott]

A little "goop" works too.
it is a little less sticky than hot melt glue, better option to get it apart if needed.

Drill and tap it, put a shoulder bolt in it, with a little locktight, cut the head off it, and use the surgical tube coupling method, with zip ties.

If your mechanism has significant momentum, and the you get encoder bouncing values when you stop due to the surgical tube twisting, change out the surgical tube with 1/4" high pressure fuel line. We needed to do this last year on our elevator. We have used this method for years in the past with surgical tube, last year was the first we saw and issue with bounce, when changing directions, stopping, etc.