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Bandsaw Circle Cutting Jig

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Project by patcollins posted 03-05-2011 01:42 AM 4451 views 11 times favorited 8 comments Add to Favorites Watch

I had some lids to make for my mom for wicker baskets so i came up with this. The top is just 1/4” Luan plywood and the guides and slider are “poplar” that have a 45 degree angle ripped down their length. I waxed the 45s so they things slid nice and good but taped off the part that would be glued to the plywood.

The first picture was taken before I had the holes drilled down the length of the slider that has a pivot pin in. The pin is just a 1” piece of 3/32” thick music wire that was chucked in the drill and polished. There is a small piece of plywood with a PSA sanding disk stuck to it that tightens up against the bottom of the slider to keep it from moving when i cut a circle. This piece is tightened with two knobs that clamp down on some 1/4-20 bolts.

I cut my first circle with it and it turned out great. I may add some more support for the wood being cut by gluing some more stock on top of the plywood but I haven’t decided if that will be necessary yet.





8 comments so far

View Paul Pomerleau's profile

Paul Pomerleau

283 posts in 1349 days


#1 posted 03-05-2011 03:57 AM

Excellent design.
I too have recently built a circle jig for my band saw to make the lid for my cyclonic separator.
I’m sure these jigs will be used often for many projects.
Well done.

-- Close to Ottawa Ontario Canada

View degoose's profile

degoose

7013 posts in 2010 days


#2 posted 03-05-2011 09:17 AM

I use my jig for cutting lazy susans.. I have made several hundred and need to update the jig… I mayu take into consideration the double knob clamp… very innovative.

-- Drink twice... and don't bother to cut... @ lazylarrywoodworks.com.au For lovers of all things timber...

View mafe's profile

mafe

9543 posts in 1744 days


#3 posted 03-05-2011 11:52 AM

So nice and simple.
Well done.
Best thoughts,
MaFe

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

View Diggerjacks's profile

Diggerjacks

1756 posts in 1794 days


#4 posted 03-05-2011 05:52 PM

Hello PAtcollins

A beautiful Jig
It’s simple but effective

Here is some goods ideas

Thanks for sharing

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

View Dusty56's profile

Dusty56

11659 posts in 2343 days


#5 posted 03-06-2011 06:59 AM

Nice jig : )
I like your design although I would have the base right up to the blade to avoid any possible tear out and also make it wider to support your projects easier. On my own circle cutting jig , I actually sliced thru the base with the blade so it acts like a zero clearance insert to avoid tearout and it supports both the project and the cutoffs. : )

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

View steliart's profile

steliart

1807 posts in 1343 days


#6 posted 03-06-2011 07:29 AM

Simple and very well made… nice work

-- Stelios L.A. Stavrinides: - I am not so rich to buy cheap tools, but... necessity is the mother of inventions - http://www.steliart.com --

View patcollins's profile

patcollins

997 posts in 1520 days


#7 posted 03-06-2011 07:01 PM

Hey Dusty

I was thinking about a ZCI like support but that would keep me from sliding the bar all the way in for storage. The way it is now I can slide it in and it fits perfectly on the lower shelf of my stand that I got for the bandsaw. The tearout was minimal on red oak but I still might do something like one that swings into place or something.

Then again I been wanting a bigger saw and if I do get one I will probably build a more substantial jig for it.

View Dusty56's profile

Dusty56

11659 posts in 2343 days


#8 posted 03-06-2011 10:41 PM

Consider what the absolute smallest circle you’re ever going to make with your jig , and adjust the length of your bar from there…just my thoughts : )

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

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