Bearing Fits

I don't know what the 50 to 150 mm means, but if your bearing variance is 22 to 40 microns, it would put any movement between 11 and 20 microns, which should be okay.

I'm also not sure what you mean by a 30 micron clearance on the shaft.

Bearing come with many tolerances. The choice of tolerance you use should be part of the design process. You should be asking the design engineer not the manufacture. The same with the fit tolerance. There are several. From a loose fit to an forced fit. The engineer that design the machine should be making the choice to get the accuracy you desire.

Unless you are going to have the bearing manufacture make you a special bearing. You should be using the bearing specs to machine the other parts to get the fit you need.

Please make your question reason more understandable: are you considering to make machines or is it a question to satisfy your curiosity ? Depending on your answer I can give one which will be satisfactory.

There si interference between shaft and bearing. So , this will not affect the accuracy of the machine. Bearings may be loose in the housing. That will affect the accuracy. But you can order bearings with zero clearance or very small clearance between outer race and housing. All bearings manufacturers websites provide data about fits and tolerances.