I may have reinvented the wheel here but I have made a mini turntable for manufacturing small components such as pipe flanges and small flywheels etc. in the lathe or on a small drill press.
Fitted into a 4 jaw chuck at the desirable radius for drilling an of centered hole the turntable can be adjusted for 2, 3, 5, 6, 10, 15 & 30 hole patterns.
I have used the 30 tooth gear cog for thread cutting that came with the lathe and mounted it inside a 2 piece 35mm diameter aluminum body on a rotating brass shaft. The cog is screwed to one of the body components, the second side of the body can be locked by engaging grub screws in between the teeth of the cog to obtain the desirable hole pattern.
A homemade chuck also of aluminum that holds 12mm brass bar with 6 grub screws is also attached to on one of the body halves.
It may also be fitted to the lathe tool post with a drill bit mounted in the lathe chuck for producing “spokes” extending from the outside diameter of the bar.
Made from bar stock and a few spare screws I already had it cost nothing to product. I have drilled and threaded a couple of test flanges that fit together very nicely.
Cheers Mick