Rotating Ballnut - design ideas

[Jonathan]

Very nice indeed Jonathan, I can see a lot of work has gone into those. ..Clive

Thanks, yes they take forever, or at least it feels like forever when you're only able to machine things at weekends. It's been three months since I agreed to make them.

How did you fasten the pulleys on the rotating ballnut shaft and motors?

M5 and M4/M5 grubscrews respectively. So long as you threadlock them it works. The reason I didn't use a clamping method is that tends to require a larger diameter pulley, particularly on the ballnut shaft, which would increase the moment of inertia.