Quote Originally Posted by marbles View Post
Cheers Dean, will get on it and order up a set. I've got 1605 ballscrews so prob 7201-2rs as dazp1976 says
The 7201 have a 32mm od. (32xx12x10mm).
I think the BK blocks take a 28mm od bearing. 28x12x9mm if memory serves correct.

I chose to custom mine to fit the 7201 just for a little more strength.