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I am just in charge of the mechanical part. My buddy has sourced all the stepper motors and motor controllers required to manipulate the CNC. I just need to get it work.

I'm in it for the fun :), I just want to build something cheap too.

Thanks!! From reading this I will probably go with an ACME precision Rod. I don't really need tight tolerances but if I can might as well do it right the first time.

So I am designing a simple CNC Mill/Router just for an easy side project. I have it modeled but I am wondering what would be an acceptable THREADED rod to use to drive my axis. I realize that the BEST solution would be a BALL SCREW but those are super expensive. Right now I am thinking 3/8 - 16...