ballscrew to stepper shaft alignment

[marbles]

There is nothing wrong with the BK-type housing, it's the correct component for the job, it's just that the cheap ones come with crappy bearings. So just replace the bearings with angular contact bearings.

This will be much simpler than making plates and fitting bearings into them because if you don't bore the opposing bearing pockets perfectly concentric to each other then you'll introduce more issues.!

Cheers Dean, will get on it and order up a set. I've got 1605 ballscrews so prob 7201-2rs as dazp1976 says