Rotating Ballnut - design ideas

[Jonathan]

I have now cut the second pulley, and made the remaining parts for one of the assemblies except the bearing pressure plate. I immediately stuck it in the milling machine vice, put a stepper on and tested it:



Will post a video tomorrow. With me just holding the 2092mm ballscrew in one hand it did 14m/min. Almost certainly more - I didn't try.

Might be while until I finish off the other one since the tip on my parting tool became an Unexpected Flying Object. It might still be ok, but my lathe is buried in so much swarf I can't find it. It took me 5 mins to find the 60mm diameter part I had parted off, let alone a tiny tip...maybe I'll tidy it tomorrow.