Here is my 3D printable turntable. I wanted one but I couldn't find any designs that I liked online. I created my own! It is very quiet, stable, smooth to rotate and only requires one small bearing that's cheap to buy. It also has a bit of weight to it so it wont slide around. the bearing is a very tight fit into the top plate but a bit of super glue or epoxy is needed to attach it to the base. This also gives the whole thing stability.
I chose to sand and paint mine in a sort of messy paint splatter. This compliments the splat pattern i gave the base. I would love to see your variations and designs if you make it. I printed it with three shells at .15mm layer height.
The bearing you need is a 626zz. You can buy them here: