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Tapered roller bearing ID=25mm OD=50mm
Initially designed for an UM2 spool holder. Turns out I didn't need one, Teflon does the trick ;-).
Prints fine without support. I printed this at 50mm/s and 0.15mm layer height with 100% infill. Some sanding is required.
Tapered roller bearings will handle both axial and radial loads. The bearings need to be installed pair wise.