I am turning a ballscrew end down, to fit a 6mm dia bearing. The bearing will be ABEC7, which has a hole tolerance of 0 to -4 microns.
So far, so good. But how big should I make the shaft?
It is 6.000 mm now (yes, to +/-1 micron :o), but normally I'd turn it down a bit more; I don't want to have to heat the bearing to get it on/off, a sort of medium interference fit will do.
I have been googling, and there are tables of tolerances, and pages with recommended fits, but I haven't seen one page which actually recommends an actual size or even what a normal type of fit is in terms of tolerances - maybe my google-fu, or perhaps my engineering-fu, or both, is weak today.
Thanks,
Peter Fairbrother