I noticed that Keyless chucks in cheap drills tend to become stuck often, but I've always wonder why does this happen.
Is it due to overtightening the chuck?
Are low quality drill bits a factor to consider?
Is it going on some heat issue (spot-welding like) between its metal components?
I am aware that this issue is also related to drilling on concrete with a low power electric drill but, again, I'm unable to find a valid reason for it.
So, any ideas?