Spherical roller bearing, works nicely. Kudos.
I printed with PLA. I had to print this with a raft. (I was using a heated bed.)
Without the raft I could not get the bearings to stay on the bed once I got further up. Once the raft was taken off the finished part everything spun and moved freely as expected.
If a rework were ever done I'd make 2 recommendations. 1. A slightly larger foot print for the bearings on the bed and 2 the angle of the top of the inner surface that mates with the bearing got a bit steep if possible that could get fixed a bit. But over all a very nice design and it did work for me. Kudos.