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Circle Cutting Jig for a Band Saw

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Project by DarbinOrvar posted 07-23-2015 07:54 PM 2254 views 27 times favorited 8 comments Add to Favorites Watch

This band saw circle cutting jig is great for making perfect circles every time. It features an adjustable sliding t-track which enables you to easily change the size of your circle, it also has a nice clamp as well as a built in measuring tape to easily set the size you want.

I built the jig using 1/2 inch Baltic Birch plywood and it’s nice and sturdy. With this jig you can make a variety of different circles with different types of wood safely and easily.

I made a very detailed step-by-step video of how to build this jig, including measurements for all the cuts. Please check it out for a much better perspective of how it works and how to build one for yourself.


View on YouTube

-- http://youtube.com/darbinorvar





8 comments so far

View robelo's profile

robelo

61 posts in 1961 days


#1 posted 07-23-2015 10:28 PM

Thanks very much

View exelectrician's profile

exelectrician

2327 posts in 1888 days


#2 posted 07-23-2015 10:41 PM

Very easy to follow video, and great jig. Thanks for posting.

-- Love thy neighbour as thyself

View Robsshop's profile

Robsshop

899 posts in 2436 days


#3 posted 07-24-2015 01:05 AM

Looks like a winner, will have to consider this for a replacement of my very basic set up that I threw together several years ago. Thanks for the details and sharing a solid design!

-- Rob,Gaithersburg,MD,One mans trash is another mans wood shop treasure ! ;-)

View mahdee's profile

mahdee

3548 posts in 1228 days


#4 posted 07-24-2015 01:35 AM

Excellent instructions of the process. Thanks a lot.

-- earthartandfoods.com

View Nitewoodwork's profile

Nitewoodwork

3 posts in 647 days


#5 posted 07-24-2015 01:58 AM

Linn, you could also mark a line 10” (for easy math) from the pin and reverse the slider to make larger circles.

View Gianni's profile

Gianni

228 posts in 1435 days


#6 posted 07-24-2015 10:32 AM

Saw this video the other day. This is my favorite circle cutter design. I used a dovetail in place of the T track style slider, and one other tweak I made was to add screws to the front stop to adjust how deep is slides onto the table. This helps because I can adjusr for blade width. I also made mine the full width of the band samw table so that I could clamp the back left corner once it’s slid on, though I don’t ever actually do it (too lazy, isn’t needed). It turned out to be good for one other reason, as it supports the cutoff and prevents it from catching on the edge of the jig while spinning the workpiece.

Too funny that I didn’t realize my band saw had T style miter slots until this video made me go look.

View Kelly's profile

Kelly

1110 posts in 2405 days


#7 posted 07-24-2015 11:04 PM

Nice job, both on the jig and the video.

If you build another, consider extending the jig table all the way to the frame. This does a couple things:

1) Sawdust coming off the blade is carried out the bottom, by your dust collector, rather than landing on the table and in the air (it really does make a big difference); and,

2) The extra area left of the blade acts as a counter balance for larger circles.

I’ve attached a picture in hopes it will make more clear what I was describing. Note, I cut holes in the portion hanging over the table to reduce the weight on that side.

The approach of using a stop [adjusted for your table, so the blade cuts in and stops straight across from the pin] has a huge advantage over stationary jigs. Being able to push the wood into the blade, until the stop hits the band saw fence rail, allows you to push any size wood into the blade, then start spinning for the cut. On stationary jigs, you MUST pre-cut the material to the same dimensions with the pin hole perfectly centered and mounted on the pin (you then turn on the saw and start cutting).

Just for reference, this one uses a T track, a piece of scrap aluminum cut to fit in the track and simple rivets for the pin (a set screw locks it in place, so I much prefer your method, even though mine has the Allen wrench stored on the jig using a rare earth magnet).

View Jim Jakosh's profile

Jim Jakosh

17125 posts in 2566 days


#8 posted 07-26-2015 12:40 AM

Great jig, Linn. Nice video on on the process and use, too!!

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

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