Step 5: Ring Cutting Jig

While you wait for the glue in your stack of octagons to dry, you can prepare the jig to cut the rings for the bowl walls.
Start with a 22" by 11" piece of 3/4" MDF. First, mount a stop on the underside of the board five inches from the trailing (short) edge. The stop will need to clear your bandsaw front fence rail and stop the jig-board at the front of the bandsaw table. I used several nails for the stop, cut very short in order to clear the front fence rail. You may use a wooden stop block, or whatever fits your bandsaw. The jig will slide on your bandsaw table along the fence and into the blade.

Once you have the stop installed on your jig board, set the bandsaw fence for 1-1/2" and run the jig (stop down) along the fence into the blade until you hit the stop. This will cut a straight line (kerf)  into your jig 1-1/2" from the left edge. Back out from the bandsaw. With a carpenter's square, draw a perpendicular line from the fence-edge of the board to the end of the cut and extend across the board. This line represents the front edge of your saw blade. It will also be the line on which you will locate the pivot points for cutting the circles for the bowl.
Drill a 3/32" hole on this line 3-1/2" from the kerf (i.e. 5" from fence-edge) and insert a 6d nail. This pivot point will produce a 3-1/2" radius, i.e.  7" diameter circle (Fence still at 1-1/2" as before!).

<p>very cool</p>
<p>Very nice job on your bowls. I&rsquo;m glad you found the Instructable useful; you sure got a beautiful set of bowls out of it. Keep up the good work!</p>
<p>Thanks for sharing this wonderfull idea. As a beginer in woodworking, you inspired me and pushed me to learn techniques to achieve these.</p>
nice <br> <br>a lathe would make skipping all the work worth it...
Don't even know what a bandsaw is but I so want to make these!
very nice!
Ok. I have now found a reason to fix my old bandsaw.
stunning piece of work
Love this! Did I need another reason to get a bandsaw? Not really.
Loved it!
This is awesome I'm gonna start some today
Cool, <br>let me know how they turn out!
Great job woodworker, next time: conic/curved sides!
very nice and great technique
It is extremely difficult to get all the edges to align when putting together these segments. A great tip for this step is to assemble two halves of the segements and then sand the facing edeges parallel. This way there are no gaps.
Very true; good suggestion! You could also custom fit the last piece.
Thanks you for sharing. This looks easier than I imagined and I think I will try this some time. Now, the obligatory safety comment: <br>I need to disagree with your suggestion to wear gloves when sanding the outside of the bowl. It is possible for a glove to get pulled into the space between the belt and the work rest. Also, if you position your work against the work rest, you can turn it more freely from the outside, not needing a hand inside to hold it against the belt. My advice is generally not to wear any gloves when using tools with fast moving parts. If you feel gloves are necessary, use the mechanics style that are snug-fitting. <br>The problem lies in the fact that gloves hinder the sensitivity of your fingertips in knowing how far they are from a moving surface (or a pinch point) and loose gloves can get pulled more easily than snug fitting ones. <br> <br>Thanks again.
okieinAZ, <br> <br>thanks for pointing out the potential safety issue. I&rsquo;m always concerned when I use any of my power tools. <br>The reason I recommended wearing gloves is that I actually let the ring spin with the sanding belt. I use one hand to steady the ring carefully against the belt, the other hand to balance and slow down the ring so that it actually gets sanded. While holding the spinning ring it gets a little hot from friction against your hand/glove, not to mention the threat of splinters. You definitely want to use gloves, safety glasses, and a dust mask if you use this method of sanding the outside. I do not use the rest/stop on the belt sander; that actually doesn&rsquo;t work with the spinning ring. <br> <br>I&rsquo;m open to suggestions for improving this step. Of course, you can always use a finishing sander, or sand by hand! <br> <br>As another comment points out, one could do all the outside sanding after the bottom is attached. But I prefer to get the outside reasonably smooth (100 grid) and round before attaching the bottom; that also helps when you do the flush-trimming with the router. <br> <br>I appreciate any other feedback! Thanks for your interest! <br>
Good tip
These are not only beautiful, but the techniques that you used makes you a boss! Never though of having a fence on a bandsaw to cut thin pieces in half, and the tape to glue the octagons together! Wow! Thanks for the write up on this, it is quite awesome!
it`s much more easier and faster to build 500$ cnc and cut all details, than using so much tools and wood, too much of material gous to trash .
Really nice instructable - it's obvious you've done a LOT of woodworking. Thanks for these bandsaw ideas. I have always had trouble with drift and shy away from using mine - maybe you've just convinced me to try again. Thanks!
I think the only thing I understood was when you wrote wipe the glue with a wet rag, because it is easier than when the glue dries. <br> <br>That being said, my not understanding has nothing to do with your instructions, Both written and visual were more than adequate for anyone with a sense of the mechanics you demonstrated. <br> <br>You are a true craftsman. I hope you accept that praise, it is clearly well deserved. <br> <br>
This should be my next project !!!&hellip; <br>But knowing me &hellip;&nbsp; <br>Anyway, many thanks for such a perfect and beautiful project ! <br>Really&hellip; <br> <br>BTW wouldn't it be easier to sand the the outside of the bowl after the bottom is glued ? After all, that will make one job instead of two (and I hate sanding !&hellip; hence my laziness&hellip; but that's another story !)
This is nice idea! It comes out in very nice design. This is why I love wood..
Hi Mihsin, paganwonder, piperskeeper, <br>Thanks for your comments and compliments. <br>
Excellent design and documentation. Beautiful creations!
Very nice project! Thank you for sharing. Well done 'ible!
Hi&nbsp;audreyobscura,&nbsp;rvt1985, and&nbsp;Matt2 Silver<br> Thanks for your nice comments and encouragement. I really enjoyed making these bowls and sharing my technique.
Attractive bowls especially when you watch them emerging through intricately calculated steps.
very nice work, thank you for sharing! Really nice craftsmanship and documentation :)
Inspirational, really nice work and beautiful pictures!
Beautiful! Awesome work <3

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