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Standard ballscrew kits use 5/8" Thomson ballscrews with a .200 pitch. Here is a link to the Thomson catalog page with detailed information on the ballscrews.




Kits include bearing locknuts on all axis.Kits normally ship in 2 weeks. It may take up to 3-4 weeks to ship depending on our queue. We will email tracking the day your kit ships. We really thank everyone for your patience.


This Kit includes all the hardware for a 3 axis conversion. NEMA23 motor mounts on all axis, lovejoy couplings, locknuts on axis, ANGULAR CONTACT thrust bearings on all axis, PREMIUM ZERO BACKLASH BALLSCREWS, and required metric cap screws & bolts. You WILL need to modify your mill to install this kit. DELUXE BALLSCREWS HAVE A 5MM PITCH.

 $989 deluxe
Heli-Cal Coupling - ZERO backlash
 $24 Heli-Cal zero backlash coupling. These are premium aluminum couplings, designed for servoes. ZERO BACKLASH. These will fit a 1/4" stepper/servo motor shaft. Helical couplings are only available for 1/4" motor shafts.
You WILL have to modify the mill to install this kit. Please look at the photos on our FaceBook page carefully. These kits will fit both the Grizzly G0704 and the BF20 series mills, and several other retailers. If you have a doubt whether your mill will fit one of our kits, just email us for confirmation.


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