Hole saws

[DaJe]

Anyone know where I can find some hole saw bits in standard fan sizes like 80mm and 120mm? Preferabley ones that can handle going through sheet metal as well.

[Bucko]

Try the hardware store, or are you meaning an online store?

The hole saws I have for metal are about AU$30 each, plus another AU$30 for the mandrel (I think that's what it's called) that the actual hole saws attach too. The bit with the drill bit in it.
I also have some cheap ones that were about $10 for a whole set. They are fine for wood or plexi, but no good for metal.

[Spawn-Inc]

make sure to get the proper one, i almost killed my drill trying to use a wood hole saw on my side panel.

[DaJe]

I did look at a store, but they're all made to match inches, not millmeters. So the closest I can get is like 84mm.

[Bucko]

In inches, you would want a 3" for 80mm fans. That should give you about a 76mm hole which works fine with it.
I have a 3 1/2" for 90mm fans (89mm hole saw)
And I have one for 120mm fans, but it's in the garage, I think it's a 4 1/2" one (114mm hole).

I prefer having them slightly smaller as it ensures the screw holes have enough meat around them, and it really isn't enough to notice the slight size difference.

[Eclecticos]

They have them at home depot (http://www.homedepot.com/webapp/wcs/stores/servlet/Search?keyword=hole+saw&onlineStore=true&langId=-1&storeId=10051&catalogId=10053&marketID=401&locStoreNum=8125).
I would recommend against the Multi Hole saw . .they suck!
The set screw stripped out the second time I used it, was a Black and Decker 7pc.

[Xpirate]

And I have one for 120mm fans, but it's in the garage, I think it's a 4 1/2" one (114mm hole).

Where did you find a 4.5" hole saw? I'll bet it was pretty expensive. The largest hole saw I have seen at the store is about 3.5".

[yazeed1906]

They have them at home depot (http://www.homedepot.com/webapp/wcs/stores/servlet/Search?keyword=hole+saw&onlineStore=true&langId=-1&storeId=10051&catalogId=10053&marketID=401&locStoreNum=8125).
I would recommend against the Multi Hole saw . .they suck!
The set screw stripped out the second time I used it, was a Black and Decker 7pc.

yeah the black and decker is a cheepy. I got a ridgid set (regularly $70 bucks) on special for 20.

[Bucko]

Where did you find a 4.5" hole saw? I'll bet it was pretty expensive. The largest hole saw I have seen at the store is about 3.5".

At my local Hardware Store. It was about $50 for just the hole saw if I remember correctly.

[Xpirate]

Found one at Home Depot (http://www.homedepot.com/webapp/wcs/stores/servlet/ProductDisplay?storeId=10051&langId=-1&catalogId=10053&productId=100495366)

Thanks yazeed1906 and Bucko. I would have never even thought to look for one because I didn't know anyone made them that big.

[Bucko]

RIDGID is a good quality brand too.

Glad we could help.

[Spawn-Inc]

RIDGID is a good quality brand too.

Glad we could help.

don't forget DeWalt.

although this is just for drywall and soft stuff it would be awesome if they made one for metal.

http://www.goodmart.com/images/prodimages/ideal/35598.jpg

[Deadeye]

I bought one at Lowes bout a week ago, 3" w/ arbor cost me $20 bucks.

If you are drilling through plastic, be very careful and make sure you have something behind the whole window pane to support it other wise it will bend and crack while you are drilling.

If your confident in your craftsmanship abilities I would recommend using a jigsaw, you can swap the blade for one better suited for the application (material) and you are not constricted by set shapes and sizes.

-Deadeye