I highly discourage anyone from using a drill with the COMANDANTE hand grinder, it's a very precise and fine tuned german handmade piece of equipment.
This is a grinder meant to be used by a passionate hand, and used by many to win the AeroPress trophy.
However, if for whatever reason you want to use a drill, and would like to live dangerously every once in a while, this is a drill bit with a cover for it that may or may not fit yours, and I hold no responsibility for any damage that might happen to your grinder.
Support is preferred for the drill-bit, but make sure it's generated from the bed only, so that you won't get any support inside the hole, as it is not necessary, for bridging will be enough being hexagonal, and this will make cleaning much easier.
I suggest going with as low resolution as you can for the cover, even if you can print it with a larger nozzle, assuming that changing the nozzle isn't a hassle for you.
Kindly note that there's a tab that needs to be broken at the end of the drill-bit tip, this is intended to minimize the requirement of support for it and substituting for bridging when slicing, after a successful print remember to break it off.