So I’m finishing up my table this week, got a couple joints of 1/2" emt for my Y axis. I disassembled my gantry to fix a couple things and I got a weird idea. I’ve got a couple drops from my 1/2" emt that were longer than my X axis tubes. I don’t know if anyone has attempted to glue tubing inside of other tubing.
I whipped up a couple things in Fusion.
An adapter that will let me pump contraction adhesive into the 3/4" tubing. The bullet thing goes on the 1/2 tubing so I can push it through the adhesive. The rings I printed 4 of, they cap off both ends in the space between the 2 tubes. I cut the inner tube like 1mm shorter so it wouldn’t stick out.
So I swabbed the 3/4" tubing with alcohol and paper towel, wiped down the 1/2" tubing. Filled quite a bit of adhesive, from my calculations with 32" tubing, the volume difference between the ID of the 3/4" tubing and the OD of the 1/2" tubing is about 11fl/oz. I used construction adhesive but epoxy or pva would probably be a better idea. It may take a long time for this stuff to fully cure.
Not sure if this will do anything but add more weight, but I can definitely tell it dampens the ring to the tubing.