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Circle Cutting Jig

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Forum topic by Roger posted 02-21-2016 01:11 AM 1158 views 0 times favorited 16 replies Add to Favorites Watch
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Roger

19878 posts in 2269 days


02-21-2016 01:11 AM

Topic tags/keywords: jig

This isn’t much of a posting, but, hopefully it might help someone who is wanting to make a circle cutting jig for a compact router, or any router as far as that is concerned. It’s all the same ordeal. Mine here is a Porter Cable model 450. Made from a scrap of 3/4 plywood. This is about 12×4. Recessed on one end where the router will be mouted. (after removing the router plate). I cut a 3/4” slot deep enough for a 1/4” nut to be recessed, about 8” long, then cut a 1/4” slot in the center of the 3/4” slot all the way through, to house a 1/4” bolt. The one you see here is way too long, but it was all I had on hand at the moment. I’ll cut it down when I get an extra minute. Anyhoo, this can cut a circle from 6” to about 16”. The bolt will protrude thru the base to be entered in a center hole where you want the hole to be. About a 1/4” cut at time going in a non-clockwise direction, always make shallow cuts all the way around until I go all the way through to make the hole. This makes it easier on the bit and the router. If ya’ll need any other help, check out youtube. There are hundreds of videos on making circle jigs. Besides here on LJ’s, that’s where I got my idea from. I’ve looked at so many, I can’t pinpoint who needs the “kudos”, so, I’ll just say, Thank you Lumberjocks, and youtube for your inspirations, and ideas. Thnx for checkin in. Always, good/bad/ugly is appreciated. There might be some ugly, cuz this jig isn’t a museum piece by any means…. lol!

Oh, btw, the bolts that hold the router to the board are recessed as you can see in one o these pics. I also used clear packing tape on the bottom of the whole board so it slides very nicely on the board you’re cutting a hole in.
https://s3.amazonaws.com/vs-lumberjocks.com/o2vhodk.jpg!

-- Roger from KY. Work/Play/Travel Safe. Keep your dust collector fed. Kentuk55@yahoo.com


16 replies so far

View recycle1943's profile

recycle1943

1156 posts in 1087 days


#1 posted 02-21-2016 01:23 AM

That’s a pretty good tool to have on hand for those ” I think I’ll make a round table top” projects
Thanks Roger

-- Dick, Malvern Ohio - Your imagination is your only holdup

View Tooch's profile

Tooch

1351 posts in 1341 days


#2 posted 02-21-2016 01:27 AM

Thanks Roger, that’s awesome. The pics def help the explanation.

-- "Well, the world needs ditch-diggers too..." - Judge Smails

View Roger's profile

Roger

19878 posts in 2269 days


#3 posted 02-21-2016 01:34 AM

You’re welcome guys. Glad to know it helped

-- Roger from KY. Work/Play/Travel Safe. Keep your dust collector fed. Kentuk55@yahoo.com

View Joe Lyddon's profile

Joe Lyddon

9444 posts in 3517 days


#4 posted 02-21-2016 01:49 AM

COOL jig!

Thank you!

-- Have Fun! Joe Lyddon - Alta Loma, CA USA - Home: http://www.WoodworkStuff.net ... My Small Gallery: http://www.ncwoodworker.net/pp/showgallery.php?ppuser=1389&cat=500"

View distrbd's profile

distrbd

2227 posts in 1911 days


#5 posted 02-21-2016 02:43 AM

You wouldn’t believe how many times I wanted to make a circle cutting jig and got sidetracked ,good for you to build one and I know you’ll be using it many times in the future rather than finding other methods just to get by.
Well done Roger.

-- Ken from Ontario, Canada

View MrUnix's profile

MrUnix

4230 posts in 1664 days


#6 posted 02-21-2016 03:31 AM

I was going to build my own, but then I ran across this at a garage sale for $1 new in the box:

That was many years ago, and I’ve used the crap out of it.. Will cut circles from 2.5” to two feet in diameter (and can easily be made to produce larger if needed), as well as lots of other functions. Funny thing is they are still being sold for about $10-$15.

Cheers,
Brad

-- Brad in FL - To be old and wise, you must first be young and stupid

View woodbutcherbynight's profile

woodbutcherbynight

2440 posts in 1874 days


#7 posted 02-21-2016 04:12 AM



I was going to build my own, but then I ran across this at a garage sale for $1 new in the box:

That was many years ago, and I ve used the crap out of it.. Will cut circles from 2.5” to two feet in diameter (and can easily be made to produce larger if needed), as well as lots of other functions. Funny thing is they are still being sold for about $10-$15.

Cheers,
Brad

- MrUnix

I found mine in my Dad’s garage, never opened. Works good but before than I used something like what the OP made.

-- Live to tell the stories, they sound better that way.

View doubleDD's profile

doubleDD

5237 posts in 1508 days


#8 posted 02-21-2016 04:40 AM

Thanks for sharing Roger. One of these will be coming to my shop soon. I, as you , just have to decide which one.

-- Dave, Downers Grove, Il. -------- When you run out of ideas, start building your dreams.

View Grumpy's profile

Grumpy

21564 posts in 3316 days


#9 posted 02-21-2016 09:25 AM

Nothing like a new jig Roger.

-- Grumpy - "Always look on the bright side of life"- Monty Python

View kiefer's profile

kiefer

4881 posts in 2132 days


#10 posted 02-21-2016 01:12 PM

Nice and simple I like that .

Klaus

-- Kiefer https://www.youtube.com/user/woodkiefer1/videos

View duckmilk's profile

duckmilk

1670 posts in 789 days


#11 posted 02-21-2016 05:09 PM

Thanks for showing us Roger, great to see other people’s designs for things like this.

-- "Duck and Bob would be out doin some farming with funny hats on." chrisstef

View andy_P's profile

andy_P

353 posts in 2673 days


#12 posted 02-21-2016 05:49 PM

I’m sure yours works great, Roger. I’ve made a lot of jigs in my time but in reality I have found over the years that, if cost is not an overbearing problem, a commercially produced jig if available usually is more accurate than one I make myself. It shows my lack of expertise I guess, but I am always just off enough to make the jig less accurate than I would like. I’m sure that is not the case with you, Roger. You do fantastic work bordering on artistic talent.

-- Wood is a gift from God/Nature that maintains its beauty forever via the hand of a woodworker.

View lew's profile

lew

11340 posts in 3220 days


#13 posted 02-21-2016 09:13 PM

Cool! I like the packing tape idea to reduce friction.

-- Lew- Time traveler. Purveyor of the Universe's finest custom rolling pins.

View nayo's profile

nayo

277 posts in 1357 days


#14 posted 02-22-2016 03:03 AM

That will work wonderful for a job that i have, but its for tomorrow morning that i have to send some plywood templates to the granite people, and i dont have a router as it being repaired. man, that would have been nice.
but i will have it in mind for the next time

thanks for the idea Roger

View oldnovice's profile

oldnovice

5730 posts in 2833 days


#15 posted 02-22-2016 05:55 AM

Elegant is the best description as it does exactly what you want!
The problem with the store bought ones is that they are so limited.

Have you ever tried Teflon adhesive tape available from Amazon for one?
It’s not cheap but it really works.
I have used it for drawer runners and shop fixtures for added slip; so far none has worn out.

-- "I never met a board I didn't like!"

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