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Bandsaw Circle Cutting Jig

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Project by TheDane posted 419 days ago 2671 views 23 times favorited 21 comments Add to Favorites Watch

I’ve needed a circle cutting jig for my bandsaw for some time. There are a lot of good jigs posted here on LJ’s … mine is sort of an amalgamation of the best I saw in my search.

This jig was built from scraps and odds & ends in my hardware bin. The platform is two pieces of plywood (1/2” and 3/4”) laminated together.

There is a cleat on the underside (operator side), which provides a positive stop. I plowed a dado in from the right centered on the blade gullets.

The ‘pivot pin’ is a #6×32 machine screw, drilled and tapped into one end of the blue T-track.

This jig can cut circles from 3” to 44” in diameter.

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





21 comments so far

View mike1950's profile

mike1950

225 posts in 422 days


#1 posted 419 days ago

NICE jig- looks simple and easy to use.

-- "There are only two ways to live your life. One is as though nothing is a miracle. The other is as if everything is."– Albert Einstein

View Ollie Vaughan's profile

Ollie Vaughan

14 posts in 1469 days


#2 posted 419 days ago

Awesome, I made one about a year ago & is great, but, I like the looks of yours a whole lot better. I just may have to make another. Thanks for posting. Ollie

-- Ollie

View Joe Lyddon's profile

Joe Lyddon

7674 posts in 2676 days


#3 posted 419 days ago

Very good!

-- 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 Bill_N's profile

Bill_N

234 posts in 902 days


#4 posted 419 days ago

Good idea
makes me want one too

-- I have the Saw Dust Fever

View gfadvm's profile

gfadvm

10708 posts in 1314 days


#5 posted 419 days ago

Nice job Gerry. I made one very similar to yours and it cut spirals! Then I figured out that the Carter Stabilizer was the culprit. Cut round circles with the regular guides! Duh, I should have been smarter!

-- " I'll try to be nicer, if you'll try to be smarter" gfadvm

View TheDane's profile

TheDane

3715 posts in 2287 days


#6 posted 419 days ago

gfadvm—Who woulda thought! Wonder why that would be?

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

View ldl's profile

ldl

1135 posts in 989 days


#7 posted 419 days ago

Nice jig Gerry. This is a future project for me.

-- Dewayne in Bainbridge, Ga. - - No one can make you mad. Only you decide when you get mad - -

View Scott Oldre's profile

Scott Oldre

374 posts in 2055 days


#8 posted 419 days ago

I would imagine that when you need a larger circle, you could simply add a little longer Track that takes over when you reach the limit of the one you already have. But I suppose anything that size would also require a support under it. Got to try one of these one day. Thanks for sharing.

-- Scott, Irmo SC

View TheDane's profile

TheDane

3715 posts in 2287 days


#9 posted 419 days ago

Scott—That was my thinking, too, but the more I think about it, if I need a larger circle (like for a table top), I would probably build a simple trammel and cut it with a router.

I have shop-made router bases that I can easily adapt to use as a trammel.

My need for this jig is more akin to cutting bowl and platter blanks before mounting them on the lathe.

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

View gfadvm's profile

gfadvm

10708 posts in 1314 days


#10 posted 419 days ago

Gerry, I think the lack of guides below the table with the Stabilizer allowed the blade to wander inward. Wish I had saved that board as it was a pretty perfect spiral.

-- " I'll try to be nicer, if you'll try to be smarter" gfadvm

View Ken90712's profile

Ken90712

14878 posts in 1813 days


#11 posted 419 days ago

Nice set up, this has been on my to do list for some time….

-- Ken, "Everyday above ground is a good day!"

View WillGrayIV's profile

WillGrayIV

6 posts in 453 days


#12 posted 418 days ago

I am a newbie in regards to woodworking and I quite don’t understand how your jig works. Is it something like a lazy susan that can turn the piece in a circle while the band saw cuts or is it a sliding tray that holds the piece you can push in any direction while the saw cuts? Thanks.

View HillbillyShooter's profile

HillbillyShooter

4475 posts in 916 days


#13 posted 418 days ago

Great jig—well thought out and nicely done.

-- John C. -- "Firearms are second only to the Constitution in importance; they are the peoples' liberty's teeth." George Washington

View TheDane's profile

TheDane

3715 posts in 2287 days


#14 posted 418 days ago

WillGrayIV—When cutting a circle, you need to restrict the range of motion to an arc … that’s what the ‘pivot pin’ is for. The pivot pin on this jig is adjustable so you can set the arc to whatever you want to get the desired diameter for your circle. In the pictures, the pivot pin is set 3” on center from the blade, resulting in a 6” diameter plywood circle.

The platform on this jig slides (from the operator side) so you can begin cutting the circle inside the piece of stock. The range of motion on the platform is restricted to a single axis … it can only slide toward (or away from) the blade at 90 degrees.

The first picture shows the jig slid only part way in. The second picture shows the cut in progress where I slid the platform all of the way in (cutting a straight line) until I reached the stop, then began rotating the piece clockwise into the blade.

The problem (as I see it) with most jigs is the pivot pin is at a fixed distance from the blade and, without a movable platform, the pivot point on the workpiece has to be exactly the same distance from the edge as pivot pin to the blade. If you off just a skosh one way or the other, either workpiece won’t fit and must be recut or you wind up with a flat spot on your circle.

Carter Products has a commercial jig that operates along the same lines as my jig … http://www.youtube.com/watch?v=dDWKsZeL1zU&feature=player_embedded ... it sells for $79.95.

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

View helluvawreck's profile

helluvawreck

15582 posts in 1490 days


#15 posted 418 days ago

This is a real nice jig, Gerry. It should be a great addition to your shop.

helluvawreck aka Charles
http://woodworkingexpo.wordpress.com

-- If a man does not keep pace with his companions, perhaps it is because he hears a different drummer. Let him step to the music which he hears, however measured or far away. Henry David Thoreau

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