Drilling Glass

[Aquascaper]

Ok, I'm about to drill a hole for an overflow pipe in my fiancees 40g tank and to be honest i'm

Has anyone had experience of drilling glass, specifically when it's already made into a tank? I can guess at lots of lubrication but has anyone got any little gems of advice to avoid me wrecking the tank and having to stick with the 100g?

 

[superman]

Ok, I'm about to drill a hole for an overflow pipe in my fiancees 40g tank and to be honest i'm

Has anyone had experience of drilling glass, specifically when it's already made into a tank? I can guess at lots of lubrication but has anyone got any little gems of advice to avoid me wrecking the tank and having to stick with the 100g?

I use a glass hole saw that has a diamond tip when I drill tanks, I use a wolfcraft drill guide and a craftsman corded drill. I lay the tank on its side, build a reservoir using plumbers putty about 1/2" tall around the area I am drilling, I use antifreeze as the lubricant. Use consistant pressure, youd don't have to push very hard, let the drill bit do the work, you should get through 1/4" glass very quickly, probably be done with the drilling in under 2 min once you start drilling. Let me know if you have any other questions. There are those that use a dremel to drill 1/4" glass, but drilling with a diamind tip hole saw works so quickly and with less fuss. I've drilled about 20 different glass tanks ranging from 20 gallon up to 220 gallon, never broke any glass yet!

 

[JJ1234567]

would these work for drilling glass?
http/cgi.ebay.com/NEIKO-USA-5PC-DIAMOND-...1QQcmdZViewItem

 

[Aquascaper]

I have a set of those, yes they do work