I want to replace my existing thermostat with a PID. The existing cutout is 42mm in diameter and I need a 45mm square. The panel is 1/4" thick tempered glass. What is the best way to "square the circle" without cracking or shattering the existing panel?
>>2002435>best wayfuck off with your best way questions.
>>2002435replace the whole glass panel with a sheet steel panel
>>2002435>the best wayRe-melt the whole pane to be the shape you want, then temper it. It's also the only viable way, as far as I know.
>>2002435the best way? build a square mount that fits in the existing holes and sits a little proud, as far as the knob to the right, and put your new components in there.you can't cut tempered glass. it will crumble.
>>2002435you need a diamond scoring tool, just etch a few mm deep into the glass on both sides and then snap it off with pliers
>>2002561It's not plate glass, it's almost certainly tempered. it would shatter.
>>2002473Unironically the best option if OP is determined to not just mount another box on top and plug that hole.
>>2002582yeah but I wanted him to try it anyway
tie a square of rope around the panel and soak it in alcohol and burn it
grind it out with a dremel and a diamond tool