Introduction: How to Make a Bowl From a Flat Plank

This instructable will show how to make a bowl from a single plank of wood, using only a jig saw and wood glue, the bowl could be mounted on a lathe to clean it up but is not necessary. This is a great way to get a nice large bowl from a cheap piece of wood.

Step 1: Materials

Materials and Tools:

-jig saw or bandsaw with a tiltable table.

-compass

-pencil

-a plank of wood atleast a 1/2" thick

-a strong woodglue

-sand paper

-optional lathe

Step 2: Measuring (ya Sometimes You Have To)

Im no fan of accurate measuring when I build things but this is one of the times its difficult not to.

Begin by marking a center line down the middle of your plank of wood, then mark the middle of this line, this is where you will put your compass.

Then mark in even increments along this center line, these will make up the rings of your bowl. The distance between lines is up to you, If you make the distance the same the as the thickness of the plank then there will be no "steps" in your bowl. I chose to have small 1/8" steps in my bowl because I think it looks quite interesting. This made my lines a little less than 1" apart . I drew six lines, the biggest being about 14" from the center and the smallest being about 8".

Now take your compass and seat it securely into the center mark you want it to stay here for all the circles you draw so they are all perfectly concentric. Then use it to trace out circles that meet all the lines you just drew.




Step 3: Cutting Down the Middle

Pretty straight forward, just cut straight down you middle line, you can use any saw you want for this but remember if the blade is to thick your bowl wont be as round.

At this point Id like to mention this method is not ideal when making a bowl like this, the best way would be to cut a board in half before drawing any lines a make a nice dovetail or other joint the hold the two boards together. This way there a much stronger joint holding the rings together, however I do not have the means to make a dovetail joint so I just butt jointed the rings together.

Anyway, I chose to use the jigsaw to make this cut because of the very thin blade, the only problem doing this is you have to be careful to cut a straight line, which is harder on the jigsaw.

Step 4: The Outer Ring

This is the easiet ring to cut, its large and you dont have to cut at an angle. Keep your table at 90 degrees and simply cut the around the outside of your ring.

Step 5: The Inner Rings

This is the key step of this instrucatable.

By cutting the rings at angles it allows them to be stacked on top of each other, giving you a good surface to glue between rings.I set my table to about 45 degrees.

To cut at an angle simply tilt the table on your saw, the angle of this cut affects the angle of the sides of your bowl. However rember if you change the angle to something other than 45 degrees it will change how well the rings fit onto eachother. You have to do a little trigonometry (yikes high school math)  you have to make the distance between rings bigger if you use a larger angle.



Step 6: Glue the Rings

Now that you have all the rings cut out you have to glue them together along the line you cut down the middle.

This is pretty straight forward, just apply glue to both  ends and press them together, for a stronger joint you could clamp it either with a circular clamp or with just use rubberbands, I didnt feel it needed it and my bowl has held up fine.

I just put a large glob of glue on a plank of wood and dipped the ends of the ring in that. Put down some wax paper so the rings dont stick to the table.

Step 7: Stack the Rings

Now just glue the different rings together to make your bowl, I rotated the point where the rings were joined together to reduce the likely hood of the bowl just splitting down the middle. In other words each joint was supported by a solid piece of wood above and below it.

This step was made slightly more difficult because there was still varnish on my plank of wood so I had to sand the tops and bottom of each ring so the glue would adhere properly, this could have been avoided either by using a virgin plank or sanding before drawing my lines.

note the spiral pattern formed by the joints.

Step 8: Waiting

Waiting for all the glue to dry properly is probably the hardest part of this project, you want the glue to cure properly before you do any major handling of the bowl.

I find that a couple episodes of top gear, a bowl of ice cream, and of course browsing instructables are great ways to pass the time.

Step 9: Enjoy or Finish on the Lathe

Now you have a nice bowl made from a flat plank, you can either leave it and just sand the glue joints, or throw it on the lathe and really smooth out the transition between joints.

I chose to just smooth the outside on the lathe as this was going to be a bowl for bird seed and you would only really see the outside.

Comments

author
dudemanguy99 (author)2016-07-03

Ive never heard thst called a jigsaw my understanding was thats a scroll saw a jigsaw being the hand held version?

author
ILykMakin (author)2016-01-03

If you have a router. Measure out each line, adding the waste from your router bit, make a circle cut jig and go. No need to have seems in the rings. Use a bit that gives an edge you like and stack them to get a nice pattern/look

https://www.instructables.com/id/How-to-Make-a-Router-Circle-Cutting-Jig/

author
sandra.bowfield (author)2015-03-27

This was what gave me inspiration to make a fruit bowl cake. Obviously I compromised with material and tools. LOVE this site!!

author
ron.heuschele (author)2014-09-30

You show the saw set at a 45 deg. angle, but those look more like a 30-35 deg angle.

author
jfree1 (author)2011-06-11

Having seen my father work great things on the lather, bandsaw and jigsaw i can appreciate the time and patience involved with this. I wonder how well it would work if you created a wave in the bowl? If you labeled the pieces from the bottom 1,2,3... and you created a bit of a stepped pattern?
base -1 -2 -3-4 then put five glued under 4 to create a rim of sorts?
Great instructions! Got the mind moving for sure!!

author
peach_fart (author)2010-07-26

thats a scroll saw not a jigsaw. a jigsaw is the hand held saw with the blade that goes in and out

author
freakyqwerty (author)peach_fart2011-05-28

Looks like a hegna saw(or how ever you spell it) that we have in my d.t class at school

author
feltonite (author)2010-08-22

Another possibility, without cutting clear down the center line, is to just feed into the saw to the circle, and then glue the cut back together after the circle is cut.

author
agussutopo (author)2010-08-05

Good job event need a complicated tool. You also a master of relaxation

author
kleinjahr (author)2010-07-25

Nicely done. I noticed that you stacked the rings on top of each other, another method is to push each ring down into the preceding. Might be easier to center that way.

author
bongodrummer (author)2010-07-12

Very nice. I had been planning something like this for a while, only using a scroll saw. I think with the scroll saw I might get away with cutting all the rings whole, without halving first, by drilling very small starting holes.. Anyway, I like your bird feeder and method! I guess you can also do interesting things like alternate light and dark woods and things this way.

author
Jor2daje (author)bongodrummer2010-07-12

Thanks, and I think it could be quite easily done with just drill small holes to fit the saw blade through, I chose not to do this because my blades where to big so hole would be very noticeable. A thing to look out for if you do drill holes, is to make sure for the inner rings your drill the hole at the same angle your saw is set at.

author
laxap (author)2010-07-11

Great idea. Makes me think of a Fresnel lens. But here, reversed effect (giving volume to something flat).

author
canida (author)2010-07-09

Looks great! And I can't fault you on Step 8 - you've got just about everything you need. ;)

author
rimar2000 (author)2010-07-05

VERY INTERESTING! I am waiting since two years ago the opportunity to do something so. But I intend to do two sets of cuts, not necessarily inclined. That is, first I will cut two slightly different diameter disks, then I will cut them in concentric circles and interlayer them. Using this method one can make the sound box of a musical instrument, too.

author
silencekilla (author)2010-07-05

lol i love your garden man

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