I need a collet solution for an "engraving machine" that I would like to use to drill PCB boards with. I will only be using 1/8" shanks. The spindle is threaded on the outside for the last 1/2". My calipers showed an outside diameter of .49", there are 10 thread per inch. The spindle has a smooth 1/8" interior shaft that runs top to bottom.
I have quite a lot of room on my Z axis, I could add an adapter of some sort if necessary. I have considered a jacobs chuck, but would rather keep the spindle mass down. Maybe an adapter for a Dremal style collet? I can't seem to find anything suitable. I would rather find something "off the shelf".
Thoughts or solutions?