80mm holesaw

[rickytim]

hey guys

I was wondering if any of you know where i could buy 80mm hole saw or some other hole saw made to cut a hole for a 80 mm fan.
Thanks for the help
ricky

[thePh@r@oh]

home depot has them, i think directron.com has them too. but id check out home depot or lowes before i ordered one off the internet.

[daveleau]

Home depot. The 3" HS is the one you want. Be sure you have the right drill for the size bit that HS needs. It is the larger chuck size, I believe. Also, I have not had good luck with wood cutting saws. I could not get it to cut through the metal. so, be sure to get a metal cutting HS. The 2.5 is a lot cheaper and has the smaller chuck size if you don't have a drill that will work. It would just mean more noise from the fan and less air flow.

[oolunchbox]

a 3" hole saw works great but isnt exactly 80mm.. its actually 76.. i havent noticed any problems mechanically or asthetically from y fans due to the estra 2mm of metal around the fan but i'm a perfectionist and when i saw that the saw was actually 76mm and not 80 (after cutting 4 holes with it) i wished i'd have taken a closer look... i dont know what the exact inches to mm conversion to say what the EXACT right size would be so i'd say either take a close look or just go witht he 3"...


ps i got mine at the local ace hardware... there's plenty of metal cutting bits out there

[Urban_Squrill]

Ahh just do it ghetto style like me. Take a dremel and a drill bit and but a hole with that. lol

[thekingofpain]

Jigsaw, masking tape, a fine metal blade + patience makes a good cut---maybe a roundfile or emerycloth to smooth any roughness out afterwards---
New jigsaw is inexpensive plus you can use it for more then cutting 3" holes later on...

[jab-tech]

Cutting tools expand with heat... If I remember correctly its up to 4% expansion (I was a toolmaker for 10 years).

So if you didn't use any coolant your holesaw could have splayed to 79mm (which is more than acceptable) , I tried using dremels and jigsaws to cut holes but there is nothing like a perfect circle of a hole saw !

[Knothead]

I DO hope that, if you plan to use the 3" holesaw, that you will be chucking it into a drill press...

(BTW, clamp a piece of wood to the back of the panel you are cutting, it'll come out perfect, with no distortion and easy clean-up on the back!)

[VHockey86]

Not neccesarily, all you need is a hole saw designed for metal and a good cordless drill and it will work perfectly fine... just make sure its a hole saw designed for metal cutting, not those cheapy wood ones. A comp case practically only 1/32 to 1/16" thick steel or aluminum, should cut like butter

[Knothead]

Originally posted by VHockey86
Not neccesarily, all you need is a hole saw designed for metal and a good cordless drill and it will work perfectly fine... just make sure its a hole saw designed for metal cutting, not those cheapy wood ones. A comp case practically only 1/32 to 1/16" thick steel or aluminum, should cut like butter

Mmmm, gotta disagree with ya there... I've cut a lot of this stuff and sometimes it works okay with a hand drill, but sometimes the holesaw hits the metal and "skitters"...which mars the surrounding area. Sometimes it can make the finished cut pretty ragged.

When using a bit larger than 3/8", nothin' but drill presses for me. Works first time, every time.