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Tool Talk Discussion Forum

Drilling holes in glass block

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Dan G

12-23-2003 06:57:40




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Does anyone know a good way to drill a hole in glass blocks? We'd like about 1 inch hole.




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John Locklear

12-16-2005 20:19:52




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 Re: Drilling holes in glass block in reply to Dan G, 12-23-2003 06:57:40  
I recently made two of the glass block Christmas decorations.You can find a drill bit at Lowe's,Home depot, or Harbor Freight Tools that is designed to cut glass. Use a 1/2" drill bit. Bore the hole in the bottom right end of the block after laying it on a flat smooth surface. I used the a strand of 50 lights. Simply feed the lights into the hole. You do not have to plug the hole.Wrap the block with two ribbons from each side and place a bow on the flat side. I can email pictures for anyone interested.Makes a very nice Christmas decoration.Can be used for other holidays by simply replacing the ribbon.Also can remove ribbon and place a figurine or statue on it for year round use.
Cost for good drill bit $13.00,glass block $3.48,ribbon and bow $3.50, lights $1.50.

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coloredwindows

12-23-2003 22:03:31




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 Re: Drilling holes in glass block in reply to Dan G, 12-23-2003 06:57:40  
they used to drill holes in glass blocks & put antifreeze solution, then seal. Glass looses a lot of heat so antifreeze stopped heat loss plus gave you a colored glass window



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craig

12-23-2003 10:52:27




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 Re: Drilling holes in glass block in reply to Dan G, 12-23-2003 06:57:40  
Use a diamomd hole saw. Take some modeling clay and form a dam around the area that you are going to drill, and fill it with water. This will keep it cool and cut down on chipping.



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Ray,IN

12-23-2003 20:59:46




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 Re: Re: Drilling holes in glass block in reply to craig, 12-23-2003 10:52:27  
You're one of the few that know about drilling glass. I was taught by my uncle using regular drill bits to drill mirrors; he used turpentine inside the dam though. It's sure not as easy as it sounds.



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Dan G's wife

12-23-2003 10:25:32




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 Re: Drilling holes in glass block in reply to Dan G, 12-23-2003 06:57:40  
In theory, "we" will drill a hole in the bottom or back of the glass block, stuff a short string of Christmas lights inside, decoupage a Christmas card to one big side of the block, wrap wire-edged Christmas ribbon around the outside edge, make a bow so the block looks like a package, plug in, and have a lighted glass block Christmas decoration with a Christmas scene on the side. Thank you all for your suggestions.

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Chris Brown

12-23-2003 09:45:52




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 Re: Drilling holes in glass block in reply to Dan G, 12-23-2003 06:57:40  
You can sand blast a hole pretty easily,although it might not be perfectly round. You might try laying a piece of steel over the glass with a hole in it and blasting through it. What are ya doin it for? curious



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Hunter n NOLa

12-23-2003 08:35:43




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 Re: Drilling holes in glass block in reply to Dan G, 12-23-2003 06:57:40  
I have a 1" diamond hole-saw that I got from a plumbing supply house. Not real cheap but does a great job.



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markct

12-23-2003 08:03:00




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 Re: Drilling holes in glass block in reply to Dan G, 12-23-2003 06:57:40  
well i have drilled glass before using valve lapping compound and a brass tube of the appropriote diameter, turn it slowly by hand and work it back and forth and you will get a nice hole, i have drilled bottled this way to make them into lamps, its slow but its alot less likely to crack it than the other methods, and make sure to keep it cool, thats what cracks glass, heat. i gota be nosey and ask why you are drilling glass block anyhow?

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hay

12-23-2003 07:58:29




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 Re: Drilling holes in glass block in reply to Dan G, 12-23-2003 06:57:40  
there are special drill bits available for glass. never seen one that big, but it may be available, check at lowe's or home depot or local hardware store.



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Van

12-23-2003 07:52:25




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 Re: Drilling holes in glass block in reply to Dan G, 12-23-2003 06:57:40  
I used a dremal tool with a ceramic burr on it, I just outlined the hole I needed and started the cut on the inside of the line and worked my way around, takes some time though, you dont want to crack the block



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