Fidget Spinners

[JohnSL]

Sorry for being late to the conversation. I've been making molds using a hobby CNC (Taig) for about 10 years. Here is an example of the molded parts (glued together) that I think speaks for itself:



The handle in front is about 0.010 inches in diameter, cut with an equally small cutter. As you can see, the parting line is nearly invisible. Also injected with a bench-top machine.

http://trains.socha.com/2011/03/making-of-slag-pot.html

So I'm not going to argue how accurate my hobby machines are. But I will say that I can get excellent results. And this was done without ball screws, using software backlash compensation.