Wood guys: I need to cut a perfect circle in wood:

[doublee]

!4" more or less, out of 5/4 oak....how is it done?

[JDJ]

See here and scroll down: http://www.thegearpage.net/board/showthread.php?t=467468&page=2

http://i84.photobucket.com/albums/k36/j616129/Champ%20Build/DSC00746.jpg

Changing your pivot point changes the radius. I use a flute bit and lower the bit with each pass.

Otoh, 4" is probably too tight to use a router. But it is a perfect circle!

[Woodenfish]

You'll need either a router trammel or circle-cutting guide with a jigsaw or band saw.

Damn glasses! I thought I read 14"??? How about a flycutter and a drillpress?

[camitchell]

http://www.microfence.com/

[xntrick]

my rotozip has a circle attachment but i have never personally used it, i am quite sure it could handle such a task with ease...

[doublee]

Thank you gentlemen!

[steve108819]

How 'bout a 4" hole-saw?!?!

[riff1006]

How 'bout a 4" hole-saw?!?!

+1...I know they make 'em that big.

[Ian Anderson]

See here and scroll down: http://www.thegearpage.net/board/showthread.php?t=467468&page=2

http://i84.photobucket.com/albums/k36/j616129/Champ%20Build/DSC00746.jpg

Changing your pivot point changes the radius. I use a flute bit and lower the bit with each pass.

Otoh, 4" is probably too tight to use a router. But it is a perfect circle!

That is your best bet. You could whip that up in a minute or three. I used to build houses and curved walls were one of my specialties. I would cut out top and bottom plates using that method only those radiuses could be 12'+

If you wanted to get fancy, you can buy a specialty router attachment that will do the same thing. Rockler or any tool shop should have one.

[Brazen]

I think the OP want 14" as his post was a typo.

[riff1006]

I think the OP want 14" as his post was a typo.

Never seen one that big. :rotflmao

[doublee]

Yes it was 14" not 4"

sorry,

ee

[Jack Gilvey]

I use these (and my router) for speaker-making. Little expensive for a single use though.

http://www.parts-express.com/pe/showdetl.cfm?Partnumber=365-250

[smiert spionam]

A circle-cutting attachment on a Dremel will definitely work -- I've used mine for similar stuff. 5/4 oak is reaching the limits of that little motor's comfortable range, but if you're patient you should still be able to make a clean cut.

[Brazen]

Yes it was 14" not 4"

sorry,

ee

I'm sure it's a force of habit, you shifted the first character thinking you're going to capitalize (a letter) but it's a number. I do that a lot of times. :)

[Pfeister]

It can be terrifying to use, but it works. It attaches right to your drill press (it's safer than it looks... :hide2).
http://images.rockler.com/rockler/images/42887-01-200.jpg
http://www.rockler.com/product.cfm?page=2393&filter=circle%20cutter

[Shiny McShine]

^^^ They work great. Yeah, you want to respect the process though.

[Mike9]

Where in the "Hudson Valley" are you located? If you want to make a circle with no hole or plug you'll need to make a larger circle template and use a pattern bit.

[John Coloccia]

See here and scroll down: http://www.thegearpage.net/board/showthread.php?t=467468&page=2

http://i84.photobucket.com/albums/k36/j616129/Champ%20Build/DSC00746.jpg

Changing your pivot point changes the radius. I use a flute bit and lower the bit with each pass.

Otoh, 4" is probably too tight to use a router. But it is a perfect circle!

This is pretty standard. Personally, I'd use my circle cutting jig on the band saw, but I'm assuming you don't have one of those. The router is a good bet. Fly cutters (the thing in Pfeister's post) are terrible implements. Aside from obvious, there's a tremendous temptation to reach for your work before things have stopped spinning, just as you'd do with a regular bit. That would be a big mistake. Still I own one and it's indispensable for some rare things.