I have the Canon EOS 650D with Canon 50mm f/1.8 II lens.
After some tests I mentioned that I have ~1cm front focusing (see this question).
Is there any way to calibrate Camera/Lens without disassembling them?
I wouldn't panic just yet. As noted in a comment to the other question, I don't think your results are quite final yet.
Assuming there is an issue, there's one way: sent them together into Canon for service. They may do this for free (Pentax did with my K10D, before Pentax started including a micro-adjust feature on their cameras), but may charge some (I wouldn't be surprised if they rule this as within acceptable tolerances for a $100 lens). They'll do the work on an optical bench and get it just right; if you send in multiple lenses, they can test the whole set and select the appropriate compromise (the camera probably doesn't have a way to remember different settings for different lenses, as a higher-end model would).
Other alternatives are: