melting glass?

Question

Is it possible to melt a hole in glass with a normal blow torch.

Answer 1

No
Not only does the torch not get hot enough (by "normal" I'm assuming a propane torch) but the flame isn't concentrated enough. Glass conducts heat incredibly well, so you have to have an exceptionally hot, concentrated flame or else the heat that would normally melt the hole will be conducted away from the spot so it would never get hot enough. Because glass is also very susceptible to expansion due to changes in its temperature, if you heat too quickly in an attempt to get the one spot hot enough to melt a hole, it will most likely crack or shatter before the hole is ever made.

Glass is not a very forgiving thing to work with. Stick with a specialized glass drill bit for that hole.

Answer 2

yes