Chuck in my drill press doesn't hold little drills.
Its for 4mm-16mm. So far i have used dremel workstation drill press with smaller holes.
I wanted to use dremel diamond cut off wheel with it.
Also dremel workstation ain't very accurate to drill metal, so this fix that issue too.
I had smaller chuck, it was with 3/8" thread, but i had no suitable threaded rod, so i re-threaded it with M12
Then used M12 threaded rod to connect smaller chuck to the drill.
Now i can use drills between 0-16mm. Its quick to change and allows me to use my drill with dremel bits too.
Easy to adjust lenght if needed.
Wanted to use diamond cut off wheel to re-use broken glass jar.