drilling tank

DonDon1

New member
Can a half full tank be drilled successfully. If so how did you do it. I have to drill two 2" holes for an internal overflow in the back of my 90 gal.
 
It can be done, but you run the risk of glass shaving getting into tank. I don't know If this will effect your live stock or not?
 
I can't remember the name of the thread, but I did read a thread a while back where a guy did do it with live stock and all and I don't think he had anything die. But I pretty sure he had taken extra precautions to make sure he didn't get shavings in the tank.
 
I thought about doing it, but then I thought about all the water on the floor if it cracks. Needless to say I am draining it.
 
<a href=showthread.php?s=&postid=13224985#post13224985 target=_blank>Originally posted</a> by kretzkiller
I thought about doing it, but then I thought about all the water on the floor if it cracks. Needless to say I am draining it.

Good idea... just because it has been done before doesn't mean 100% success... Murphy is my friend and like to visit alot so I'd recommend draining the tank...:)
 
I posted the link to the video just in case you had extra large Kahunas. Obviously the guy in the video did.

Although drilling/grinding a tank is fairly easy, it took everything I had to get up enough nerve to drill my brand new tank. I now will drill a new tank without hesitation but I doubt I'd ever have enough nerve to try a filled tank. I just think of the terrible mess that would be made of my house if I made a mistake while drilling it.
 
man im in the same boat you are.

i REALLY wanna drill my tank, but its a 125 gallon filled with alot of rock, substrate, etc....

ill do it if you do it.
 
I will be honest I have drilled quite a few operating tanks, but I don't like to do it. Myself, I don't worry about the glass getting into the tank, since the grinding residue is so small it makes very fine sand for the tank. I drill from the inside to the outside, so if it does chip as the hole is finishing the chips do fall out of the tank.

It is pretty easy to do, as long as the glass is not tempered, just grind slowly, and keep the bit wet so it does not grab at all. Drop the water level as low as you can before drilling and make sure you practice drilling before attempting this so you don't end up cracking the tank. I myself have drilled I don't know at least 75 tanks total and have never cracked one when drilling. I have found some tempered glass that I was not expecting, and I have cracked one tank a few years ago, when I was enlarging a hole from 1.5 to 1.75 inches. Just make sure you go slow and hold the drill as steady as you can because if you tip the drill after the bit is most of the way through the glass you can cause it to bind and end up cracking or chipping the main glass.

Kim
 
<a href=showthread.php?s=&postid=13227005#post13227005 target=_blank>Originally posted</a> by kgross
Just make sure you go slow and hold the drill as steady as you can because if you tip the drill after the bit is most of the way through the glass you can cause it to bind and end up cracking or chipping the main glass.

Kim

A drill with a clutch works great to prevent problems from a drill that gets caught and most cordless drills have a clutch setting. When drilling my tank I set mine to the lower clutch setting so it would go off if I was tilting the drill to much.
 
<a href=showthread.php?s=&postid=13227390#post13227390 target=_blank>Originally posted</a> by Hornet
A drill with a clutch works great to prevent problems from a drill that gets caught and most cordless drills have a clutch setting. When drilling my tank I set mine to the lower clutch setting so it would go off if I was tilting the drill to much.
Good call!
 
well i going to try it, but not any time soon. I have to get everything together for my new sump, so maybe in a couple of months i will drill the 90 gal for my over flow. Just doing my homework on this first before I tried it.
 
There are lots of ways to keep the bit wet. If the tank is empty put the tank so you are drilling down into a horizontal surface and use a hose that is running a slow dribble on the cut. You can do this with a vertical setup also. Or if you are trying to drill a tank with water/life in it, what I do is dip the bit into the tank ever 20 to 30 seconds, or if I have help, have them poor water over the bit.

Kim
 
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