I need to make my own lathe-like chuck out of aluminium for a one-off machine I'm making.
It will be self-centering so I need to make a spiral groove, 5mm deep, in a 10mm thick, 150mm diameter circular plate of aluminium. The grooves will be around 3-8mm wide, and spaced about the same.
I only have diy tools to do this - a mitre saw and pillar drill and the usual hand drills etc etc, no lathe or milling machine.
It it possible to do this somehow?