Jigs etc. #3: Simple Circle Cutting Jig for the Routing Table

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Blog entry by BritBoxmaker posted 03-26-2011 05:58 PM 8971 reads 19 times favorited 20 comments Add to Favorites Watch
« Part 2: The old 60° Part 3 of Jigs etc. series Part 4: Snakes and Ladders - Hinge Template Routing Jig »

Hello all. I’m about to make a small box featuring curves. Something I don’t do often. Curves that is, not boxes and it occurred to me to feature the jig I will be using to build it with. Yes I know I’ve recently posted a couple of circle jigs for the bandsaw but there is more than one way to skin a cat and its always useful to have an alternative to call on.

This is it

Its just a sheet of 6mm Perspex with three slots cut in it and a 6mm pin inserted in a tapped hole. The two outer/rear slots for mounting and the front/central slot to clear the router bit.

Thats it! Its nothing new. I’m sure many have been made like this before. I show this only because there may be many out there new to woodworking and it bears repeating for their sake.

The only point worthy of note is that the knobs securing the jig to the router table are to the rear of the router bit (on the opposite side of the bit to the pin) in order to allow 360° rotation of the piece being cut.

Dimensions are to suit your particular router table. I use a 6mm spiral bit for clean edge cuts. The tasteful reflections are an optional extra.

An extra couple of shots, without reflections showing without workpiece

and with workpiece.


Be seeing you.

-- Martyn -- Boxologist, Pattern Juggler and Candyman of the visually challenging.

20 comments so far

View BritBoxmaker's profile


4611 posts in 3400 days

#1 posted 03-26-2011 06:07 PM

Range of cut on this one is from 25mm to 250mm radius. Incidentally you don’t need much material to the jig in front of the pin (part closest to the operator) as 50% of the workpiece is on the jig between the pin and the router bit.

-- Martyn -- Boxologist, Pattern Juggler and Candyman of the visually challenging.

View Kent Shepherd's profile

Kent Shepherd

2718 posts in 3650 days

#2 posted 03-26-2011 07:02 PM

Looks good Martyn

Thanks for sharing


View lilredweldingrod's profile


2496 posts in 3470 days

#3 posted 03-26-2011 08:09 PM

You just can’t beat the Kiss principle. Thanks for sharing, Martyn.

View degoose's profile


7255 posts in 3718 days

#4 posted 03-26-2011 08:40 PM

I like the perspex idea…

-- Don't drink and use power tools @

View mikethetermite's profile


599 posts in 3630 days

#5 posted 03-26-2011 09:40 PM

I made a circle jig for the band saw where the pin moved. (Much like degoose and dustbunny made). Yours is so Simple, clean and easy to use. I’ll have to try one on the router.

Thanks for sharing.

-- Mike The Termite ~~~~~ Working safely may get old, but so do those who practice it.

View BertFlores58's profile


1698 posts in 3286 days

#6 posted 03-26-2011 11:38 PM

Martyn, you do make life easy and simple…. but you make my mind spinning out what circle design and construction you are up to… hah? Thanks for this jig.

-- Bert

View headkeep's profile


11 posts in 3216 days

#7 posted 03-26-2011 11:50 PM

Hi, I’m really not comfortable using a router but, I do have one. Anyway, I’m having a hard time visualizing how to use this jig. It seems I need to cut circles quite often and they come out, well, like crap! So, I actually can use this if only I could properly visualize it in operation. Anyone got a video to post showing something like this? Thanks!

-- Dan

View BritBoxmaker's profile


4611 posts in 3400 days

#8 posted 03-27-2011 12:05 AM

Thanks all.

Dan, I realise the perspex doesn’t make it easy to see how to use it. I’ll try and get an MDF model together in the next few days with some step by step stuff. Don’t know about video though. I haven’t got into that yet.

-- Martyn -- Boxologist, Pattern Juggler and Candyman of the visually challenging.

View SPalm's profile


5333 posts in 4246 days

#9 posted 03-27-2011 12:46 AM

Neat. I like the clear plastic. You keep it nice and simple.
And I am glad you don’t have to skin anymore cats, that is a bad visual.

Now I keep wondering what you are up to.

-- -- I'm no rocket surgeon

View patron's profile


13648 posts in 3705 days

#10 posted 03-27-2011 01:35 AM

nice martyn
i like the way you think
all the way through
until it is down to it’s simplest form


-- david - only thru kindness can this world be whole . If we don't succeed we run the risk of failure. Dan Quayle

View mafe's profile


11979 posts in 3453 days

#11 posted 03-28-2011 10:27 PM

Nice and simple, just the way we love it!
You rock my friend.
Best thoughts,

-- MAD F, the fanatical rhykenologist and vintage architect. Democraticwoodworking.

View BritBoxmaker's profile


4611 posts in 3400 days

#12 posted 03-29-2011 01:58 PM

Thanks guys. Simple always seem to be best and in this case perspex was a better mount for the post than mdf of the same thickness. I like perspex too.

-- Martyn -- Boxologist, Pattern Juggler and Candyman of the visually challenging.

View stefang's profile


16705 posts in 3698 days

#13 posted 04-01-2011 01:32 PM

Very good jig Martyn. This one looks a lot safer than many others I’ve seen. Thanks.

-- Mike, an American living in Norway.

View SawTooth1953's profile


339 posts in 3670 days

#14 posted 04-09-2011 07:29 PM

I’ve seen a lot of jigs for a lot of things, but this type of circle jig for the router table is new to me. Thank you very much for show this to us.

-- Spence in Skokie, IL

View Jim Jakosh's profile

Jim Jakosh

22535 posts in 3469 days

#15 posted 07-12-2011 11:30 PM

That is slick and simple, Martyn. On the router and on the bandsaw fixture, how do you start the cut on the bigger diameter? Do you touch the part and slide it in to radius you want of set the radius and then?? Thanks, Jim

-- Jim Jakosh.....Practical Wood Products...........Learn something new every day!! Variety is the Spice of Life!!

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