Thanks for your reply. the fact is that the Cema bottom bracket works on the inner rail of the bearing and has no plastic to grind . The fact is that the Shimano crankset fits perfectly, so the movement has nothing, it's the wrong titanium shaft. I feel if I can get a new shaft sent to me

Hi everyone, this is my first post. I bought a Hudud crankset, which is very nice, but also very problematic. The titanium shaft has a tolerance that, in my opinion, is incorrect, because the diameter of the Cema bearing housing measures 24 mm +/- 0, while the shaft  has an outside diameter of 24 mm -0.01 mm. Clearly, with a tolerance of just one hundredth, the shaft won't fit and with grease, things get complicated, there's no way to insert it. Has this happened to anyone else, or is it just my problem? Thanks, I look forward to your replies.