File mm groove onto glass?
You do not want to score the glass with a groove. Even the shallowest score mark in glass will create a line along which the glass will crack. In fact a glass cutter is nothing more than a very hard metal wheel attached to a tool handle that allows a score groove to be created across a sheet of glass.

Glass Cutter:



There are also specialty tools such as this glass bottle cutter that essentially is a mechanism to allow a score mark to be made around the outside of a bottle.