Drilling a tank in the cold?

[jlombardi29]

I need to drill my new tank for a over flow does anyone know if temp of the glass matters it's only been in the 50s here in michigan and I want to do it outside

[Mysticalknight]

I think you would be alright, typically the problem with drilling glass is it gets too hot. Thats why you water cool the bit

[Gorgok]

Its not the hot or the cold that really matters (to an extent obviously, extreme heat melts, extreme cold makes even metal brittle), its a large rapid change thats really bad. I doubt you will get those kinds of temperatures if you drill properly with cooling even if its a little chilly outside.

Drilling dry till its good and hot then throwing ice water on it would probably be pretty spectacular though...

[jda]

I did one last night... about 42. I do them outside and constantly run the hose over the hole to keep it a constant temp and to get the glass dust out. I go pretty fast, but it won't heat up with the water running.