Rotating Ballnut - design ideas

[Jonathan]

4th, and hopefully final, design:



That's one double row angular contact bearing to take the thrust load, and one standard bearing. Stepper will bolt on to the 15mm plate. I can use 4" aluminium bar for the bits on the other side, and 2.5" for the rest purely because those are the sizes I've found cheap!

Edit: Disregard that, not thinking... this one still does not preload the bearing properly. I'll add another angular contact bearing, but that's going to cost too much :sad::sad: Now I'm a bit stuck, perhaps a thrust bearing would do.