[Tom Ore]

Your device is fairly small and the loads are low. A flanged ball bearing would handle the loads just fine. The challenge may be getting a solid attachement between the turntable and the shaft. I checked McMasterCarr and it looks like even a very small bearing (say 3/8" shaft) will handle the loads. The problem is that this may be too small of a shaft to attach to your turntable. I'm wondering if you can get by with plastic bushings rather than a rolling element bearing.