"Clutch" for a drill press. To drill and tap smaller holes.

[Tuomas]

Continued with the issue about small holes and big drill press.

Made this "clutch". Its a prototype, but works.

It was a little difficult to get things to go straight, threads for the rod and chuck. Without a metal lathe.

But i think it can be done well enough with hand tools too.

Idea is very simple. Chuck in the drill press, holds the clutch from the 16mm pipe.

Axle inside the pipe is allowed to go round and move up and down.

Spring transmits the power from the pipe to the smaller chuck, when drill stucks, it doesn't break because spring starts to "slide" .

Spring also allows tapping tool to move up and down, that's important. Otherwise thread would break.

12mm axle.
12/28 5mm thick washers
60mm x 15mm x 1.5 spring.
Drill chuck with M12 thread.
16/12mm pipe. 12/28 2mm thick locking washer.