Three items not mentioned in all the replies -
1. Lazy susan is generally a standard hardware item, - Ace or otherwise; woodworking stores will be a premium expense, and maybe even not needed at all (see 3 below).
2. One mention is made of using an old chair air riser - having visited commercial furniture manuf., I saw their professional tables were on a true pneumatic air assembly, probably prohibitive for a home shop. But, a method to adjust the height up and down is generally pretty essential for lighting, reflection, and full vision of the workpiece.
3, Forgo the lazy susan part completely and use bolt with bushing spacer in between center of two circles cut out of sheet of plywood (usually 1/2" will suffice) and small castors or even ball bearing mounts between outer edges of the circle (disks) of plywood.