OK. Don't be so disparaging, not everyone is a skilled technical writer.
Do you mean that if you chuck up a drill bit, power off, grab the outside
of the chuck and wiggle that there is tangible side play in one or more
directions? That would be terrible if so. Or do you mean that if you put
a workpiece on the table, chuck up a drill bit, start the motor, and as
you lower the drill bit into the workpiece as it touches it "skitters"
around a little? These are two very different issues and I'm still not
clear on which you've got going on.

Grant

Chris wrote:
Grant wrote:

um, "deflect". Do you mean it wanders and the hole doesn't start where
you think it should start? ...


English really is my first language, even if it doesn't show
sometimes.

The point of the bit makes 1 move, in one direction - it doesn't move
in a circle or make random motions. I could be convinced that it is
the chuck that is moving, rather than the bit flexing, too. I don't
see any sort of nut or screw or drawbar or ??? holding the chuck to
the machine, so I'm not sure how I would tighten it if this is indeed
the case.

I think your suggestion about the mill-drill is probably the right
solution.

Chris