Rotating Ballnut - design ideas

[Jonathan]

Hi Jonathan, any chance you could knock 2 of these units up for me?

Im running the 2020 ballscrew and need someway of using a screw of 3000mm length without whipping and this looks ideal

Yes I can, depending on how soon you need them.

A rotating ballnut would be ideal with the a 2020, 3000mm long screw. Since (I gather) this is a woodworking machine, you would probably want to gear it 2:1 so the gantry moves 10mm for every motor revolution.

Here's one I made recently, version 3 I suppose. The significant change is using sealed angular contact bearings (turns out they do exist) and threading the shaft to enable a pair of locknuts to pre-load the bearings.



Will post a video when I have time.