Anyone have any suggestions on how I can cut a disc of around 40mm diameter out of a piece of 4mm or 5mm thick window-type glass? I need the disc itself, not the hole.
I've heard of using a copper pipe in a drilling machine, with an abrasive slurry to grind through the glass - any experiences with this method? Other suggestions?
I only need 1 or 2, so buying a suitably sized diamond core drill is out. The disc will be epoxied into a metal holder, so I'd like it to be within about 1mm on diameter.