Browsing the web lets you find some little gems from time to time… I just found one and want to share it with you…
https://grabcad.com/library/ball-bearing-nut-for-tr8-2-d2-screw-1
I remember some one pointing out that though the radial friction is bearinged . The axial forces is still sheared like a screw or something like that. Any one else remember?
It’ll tear up the screws pretty bad if there’s any meaningful Z load. Like rubbing your car tires on a curb.