Pottery Wheel (608 bearing)
thingiverse
My model is 20cm in diameter but if you downloaded the F3D file and changed the sketch in Fusion 360 you could customize it to other sizes. I don't recommend going much bigger, the edges already can touch and grind on each other if not balanced. Patterned after generic Chinese manufactured pottery wheels. Uses a standard 608 bearing. (Which is the most common size of ball bearing, so you can get them quite cheap.) Would also work as 3D scanning turntable though it is not powered.
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