Drilling into glass

[cactusmoe]

I'm about to drill some holes in my tank and have no idea how close together they can b without a risk of breaking. The holes aren't going to b more than 1/4"

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[revhtree]

Bump!

 

[Nuocmam]

There's some general rule of thumb. I believe it's 1.5X the size of the hole from the edge of glass. That's what I used on a cube that I drilled. HTH.

 

[cactusmoe]

Thanks nuoc

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[cactusmoe]

That sent before I was done.....I don't really get on forums much, is a bump good or bad?

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[_Alex_]

he was just trying to help you get your answer from someone by bumping it back into the rotation of posts ;)

also try and stay like said above. you can go within a couple inches of each other but the more you put the more chance of a break. use lots of water and good sharp bits and should be fine.

 

[_Alex_]

also let the drill do the work, no pressure is really needed to cut threw it with a good bit.

 

[bct15]

The magic number for void coalescence is roughly 6 void diameters for most crystalline materials. That means the holes will "feel" eachother any closer than this, but noone realistically wants holes that far apart in their tank, so you want to find a good medium that the glass can support. Use good judgement based off of a little research, but I'm thinking two diameters might be sufficient.

 

[JR's Reef]

3" from all edges to dead center of the hole is what I do when building tanks. That would work for most hole bits. Since your making 1/4" hole you would be fine at 2" dead center

 

[cactusmoe]

Thanks for the help. Btw I meant to say 1 1/4"

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