Take a look at the Taig and Sherline mills on my site. Either one would be a good choice for producing jewelry waxes. With the rotary 4th axis attachment, they're able to cut all the way around a part, or flip it and cut on different sides. I've also got a "123 wax ring" fixture which works with DeskProto's wizard to make this easier by cutting a spoked wheel inside a ring so it can be detached, remounted on the 4th axis, and cut all the way around the periphery.