OK this is neat, a threadless ball screw

Posted on May 2, 2016 by robertwilkie

I had to watch the video a few times, but its bearings on a rod, and the rod spins to move the platform up and down.  No threads.  You can print out your own too.

Threadless Ballscrew for 3D Printer

https://www.thingiverse.com/thing:124706

This entry was posted in CNC/3D-printing, Misc-Life. Bookmark the permalink.