cutting aluminum

[lozina]

I think I need to add another intake fan to my case, because there's alot of dust inside the case while the two intakes have dust filters. The two exhaust fans must be pushing more air out then is coming in through the intake fans so the dust is coming in through the little slots and vent holes. So I wanna cut a hole on the top of my case to add a third 80mm fan pushing down from above.

The case is an aluminum Lian-Li, I forget the exact model but maybe the PC-60 ? theres plenty of room to mount a fan from the top the only question is whats the best way to make a nice circle in this aluminum? It seems like pretty thick aluminum, like 1/8th inch. I have a Dremel but Im not sure if the bits I currently have are any good... the only cutting bit I have is for sheetrock/soft wood. So if I should use the Dremel, How do you make a good circular cut? I doubt my hands are steady enough!

 

[MrColin]

What you need is a Hole Saw. It goes on a drill. There is an actual drill-bit in the middle to center the hole, and a circular saw blade that will cut your hole. Counterintuitively, I'ts best to cut metal at low speeds because excess heat can ruin your cutting tool.