With the aid of my motorized router lift, I can create medium to large circles on the router table easily.
Forget that router trammel or bandsaw circle jig, with this method, you can make circles on your router table with no dust and no fuss.
This method is safer, cleaner and more accurate than many other methods. If you have a router table with a miter slot, check out this setup!
The scale is based on the pythagoream thoreom. THe hypotenuse of a right triangle is changed to alter the radius of the circle being cut. The scale is designed to display a radius, but is graduated using the pythagoream thoreom.
The Video Explains a lot (and note the awkward pause at the beginning…LOL) :
The Scale:
-- John Nixon - Buffalo, NY - www.EagleLakeWoodworking.com






















9 comments so far
Karson
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14222 posts in 940 days
posted 517 days ago
Very interesting jig. and a nice process video.
Thanks
-- Karson Southern Delaware karson_morrison@bigfoot.com †
Damian Penney
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732 posts in 531 days
posted 517 days ago
That’s a pretty cool jig, wouldn’t it be quicker to setup something similar on your bandsaw though?
-- I am always doing that which I can not do, in order that I may learn how to do it. - Pablo Picasso
John Nixon
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135 posts in 603 days
posted 517 days ago
Thanks for checking out the video Karson & Damian.
Damian – yes, it probably would be easier to cut the circle out on the bandsaw. The advantage to setting up on the router table would be in making decorative edges, or inlayed rings. To be honest, I hate my bandsaw which is probably why I went to the router table to begin with.
-- John Nixon - Buffalo, NY - www.EagleLakeWoodworking.com
Bill
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2524 posts in 701 days
posted 517 days ago
Nice job John. At first I thought you were just turning circles, until I realized you were also lowering the work each time you went around.
It looks like you could use your same jig on the bandsaw as well. Like you said, you can put an edge on the piece with the router while making the circle.
Did you clamp the bar in place? I did not see that, but thought you must have to keep the circle cut even.
-- Bill, Turlock California, http://www.brookswoodworks.com
mot
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4863 posts in 576 days
posted 517 days ago
Nice video John. Always excellent information and presentation. Thanks!
-- You can discover more about a person in an hour of play than in a year of conversation. (Plato)
John Nixon
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135 posts in 603 days
posted 517 days ago
Hi Bill, thanks for checking out the video.
I am actually raising the bit into the wood with a foot pedal connected to my motorized router lift. I can gradually raise the bit height and eventually cut the circle.
I do clamp the scale into the miter guage by way of that allen bolt on the end that separates the scale as it tightens and locks it in place (it’s a pretty snug fit to begin with, and tightening the bolt just seals the deal).
Thanks for the compliments Bill, I’m glad you like it.
-- John Nixon - Buffalo, NY - www.EagleLakeWoodworking.com
John Nixon
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135 posts in 603 days
posted 517 days ago
Thanks Mot! I appreciate you taking the time to check it out.
-- John Nixon - Buffalo, NY - www.EagleLakeWoodworking.com
john
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818 posts in 921 days
posted 517 days ago
I sure wish i had high speed.
-- John in Cranbrook http://www.extremebirdhouse.com ....http://community.webshots.com/user/cranbrook2
John Nixon
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135 posts in 603 days
posted 517 days ago
Hi John,
You could download the video from Google and then watch it when it’s finished downloading. I’m not sure how big the download would be, but you could start and then go have a sandwich.
Here’s the link to the video on Google – there’s a download link on the right:
http://video.google.com/videoplay?docid=-6413447113560247068
BTW – I am a big fan of your work. Absolutely amazing creations you come up with. I built a bird house with my 6 year old son last week, and he had a blast. Nothing close to your mansions, just a little 5 room joint for the local feathers.
-- John Nixon - Buffalo, NY - www.EagleLakeWoodworking.com