drilling a tank

Im gonna be drilling my first tank with a drill in a few weeks and I wish I had a drill press

I drilled my old tank with a dremel, so I can answer half of your question : go slow
 
I've drilled a few of my tanks, and I always had my drill set to the low speed. I figured if it catches or skips theres less shock to the glass if its turning lower rpm's. I would say a hand drill is better, cause you can "feel" more. Either way its really easy so I don’t think it matters much.
 
10's are thin. I drilled 4 holes in a Nano Cube. Free hand with drill on medium speed. Used a plumers putty ring around the hole at least 1/2 inch high, filled with water.
 
I have a garden hose running on the bit so heat shouldn't be a problem.The 10 gal. was just a test but I'm running out of sides to drill.
 
Andystl and I drilled his tank a few weeks ago. He used a hand drill at a slow to medium speed and I ran a trickle of water over it and put a finger near the bit to make sure nothing got hot. He drilled 2 holes quickly and easily. I was nervous because I'd never done it before but it went real easy. Just take your time and be sure to run water over it.
 
Age?

Age?

I used to get glass cut by a friend at a hardware store. He used to have all sorts of pain when cutting old glass. I saw something similar when trying to polish scratches out of my tank when it was new and then years later I was not able to make a dent in them.

Not sure about the science here but from what I gathered the older it gets the more brittle is will be. I can attest to this by the condition of my bones.

As far as drilling 10g tanks (thin glass), I would suggest a drill press and to support the back that you are drilling in to. Thin glass will deflect/bend and that would not be good.
Just my 2 ¢
Faz
 
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