[Steven Dufresne], Hackaday writer and the mad scientist behind Rimstar.org, kindly documented how to safely and reliably remove the chuck from a drill motor. You may think this is easy ...

With the adjustments, he was able to add in a cheap drill chuck, which fit in quite nicely with just a slight wobble of 5 thousandths on either side. To introduce some control, he added in a worm ...