As for the process for glass, a Glass Drilling Machine for the drilling for glass is also important besides grindind. And hoe to use a drilling machine properly? You can drill glass without breaking it, but you need to use the right tools. The first critical choice is what drill and drill bits to use. To cut glass, you'll have to use a drill bit made of either tungsten carbide or diamond. If you use a diamond drill bit, don't use a hammer drill, as that will damage the diamond drill bit. http://www.sgcmachinery.com/glass-drilling-machine/