router circle cutting jig

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Project by Sawdust posted 01-31-2013 02:35 AM 16707 views 40 times favorited 17 comments Add to Favorites Watch

Finally got around to making one of these, and it works great for any size circle, from very small to large circle projects or holes. Found the idea in a router book someone gave me. Pretty easy to make from 3/4” plywood scrap. You need some extra long screws for attaching base to router, a keyhole bit to make the track for the adjustable hardwood slide, bolt and a knob. A cut off nail makes the pivot point.

17 comments so far

View Bill_N's profile


235 posts in 2423 days

#1 posted 01-31-2013 08:19 AM

I like the cool design
Need to make one of these for sure

-- I have the Saw Dust Fever

View William's profile


9950 posts in 2987 days

#2 posted 01-31-2013 12:19 PM

I like that design.
I have two circle router jig. One is for circles from basically zero to around fouteen inches. The other one is for circles from twelve inches out to about four foot.
With this design, if you turn the sliding piece around, how far down will the nail go towards the router?
I guess what I’m asking is how small a circle can you cut with this and how large a circle?
I’m thinking of rethinking my circle jig for my router.


View TheDane's profile


5524 posts in 3808 days

#3 posted 01-31-2013 01:43 PM

I need one of these … today!

Thanks for posting.


-- Gerry -- "I don't plan to ever really grow up ... I'm just going to learn how to act in public!"

View Sawdust's profile


128 posts in 4552 days

#4 posted 01-31-2013 02:25 PM


I think I can get to about a 2 inch disk on the short side, and about 18” with the slide reversed. I also made a longer sliding insert to get me out to about 40”. I haven’t tried it out yet.

View PurpLev's profile


8540 posts in 3793 days

#5 posted 01-31-2013 02:28 PM

very nicely done and a very useful jig.

-- ㊍ When in doubt - There is no doubt - Go the safer route.

View Jorge G.'s profile

Jorge G.

1537 posts in 2620 days

#6 posted 01-31-2013 04:54 PM

Nice job. I like that you can switch the length of the staff.

-- To surrender a dream leaves life as it is — and not as it could be.

View Fishinbo's profile


11362 posts in 2320 days

#7 posted 01-31-2013 04:59 PM

Cool and very well done and make the job easier and faster.


View helluvawreck's profile


32083 posts in 3011 days

#8 posted 01-31-2013 05:07 PM

You did a very nice job on that circle jig.

helluvawreck aka Charles

-- helluvawreck aka Charles,

View Dusty56's profile


11822 posts in 3833 days

#9 posted 01-31-2013 05:47 PM

Simply perfect : ) Thank you .

-- I'm absolutely positive that I couldn't be more uncertain!

View Diggerjacks's profile


2270 posts in 3284 days

#10 posted 01-31-2013 06:28 PM

Hello sawdust

You did a very nice job on that circle jig.

In my favorite for the future …

-- Diggerjack-France ---The only limit is the limit of the mind and the mind has no limit

View cgrooms's profile


44 posts in 3235 days

#11 posted 01-31-2013 11:05 PM

I have a very simple circle-cutting jig for my router that’s basically a piece of 1/4” ply attached to the router and a series of holes drilled in it to determine the size of the circle. It’s a pain to constantly have to drill new holes in it when I need a new circle size.
I’m gonna have to try this one for its infinite adjustability. Thanks so much for the idea.

View Alan72's profile


216 posts in 2178 days

#12 posted 01-31-2013 11:34 PM

That’s really nice, what book did you get the plans from! That’s something I’am sure I would use all the time. Nice Jig.

View Mean_Dean's profile


6881 posts in 3292 days

#13 posted 02-01-2013 01:08 AM

Excellent circle cutting jig! I’ll bet you’ll get a lot of use out of it!

Question, though: How does it cut on endgrain? Does it tear the snot out of it, or does it cut it smoothly? I’ve had terrible luck with trying to flush trim endgrain…....

-- Dean -- "Don't give up the ship -- fight her 'till she sinks!" Capt James Lawrence USN

View Sawdust's profile


128 posts in 4552 days

#14 posted 02-01-2013 02:23 AM

Came from a book called Router Magic. Cuts end grain great with a good straight cutting bit.

View exelectrician's profile


2328 posts in 2572 days

#15 posted 02-01-2013 06:38 AM

Yes, I am looking at my copy of Router magic by Bill Hylton – he has a lot of cool ideas in there. Nice job on your jig Sawdust.

-- Love thy neighbour as thyself

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