Collapsible plywood bowl

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Project by Bob Collins posted 10-12-2013 03:55 AM 3355 views 2 times favorited 8 comments Add to Favorites Watch

Just a fun project which I had to do to see if this system really works. Cut on the band saw in a continuous spiral
movement at a 5 degree angle. Found that plywood is a bit springy and will try it again with a 10 degree cut to get a firmer grip when pressed open. This is first attempt, maybe a pattern or inlay would take the plain look of the finish but it is another piece of my plywood pile used up. Cheers.

-- RIP Bob C, Australia. Your best teacher is your last mistake.

8 comments so far

View WoodenFrog's profile


2737 posts in 4198 days

#1 posted 10-12-2013 05:43 AM

Well that is really neat! Great job!

-- Robert B. Sabina, Ohio.....

View Sam Shakouri's profile

Sam Shakouri

1200 posts in 4372 days

#2 posted 10-12-2013 10:07 AM

This one is really hard with plywood. You are now officially the master of plywood.
Q: How did you drew the swirl line. Very long time ago, someone told me how to do it by compasses. but because I did not use it, I forgot it.

-- Sam Shakouri / CREATING WONDERS WITH WOOD.....Sydney,Australia....

View Bob Collins's profile

Bob Collins

2847 posts in 4968 days

#3 posted 10-12-2013 10:39 AM

Thanks for the compliment Sam but I sure have a long way to go. I search Google for “drawing a flat spiral” and found a couple to save and play with. I have tried the nail in the centre of the blank with string wrapped around it, the pencil in the loop on the end and as you and draw the string unwinds forming a spiral. Found that would be better for larger work. Easiest way is to find a suitable spiral illustration, copy, run of some copies and transfer it to the wood with carbon paper. Is the one with the compass drawing two sets of semi circles and join them up? Hope this helps and doesn’t confuse. Thanks Robert for the comment, hey you do great rings mate.

-- RIP Bob C, Australia. Your best teacher is your last mistake.

View aussiedave's profile


3114 posts in 3109 days

#4 posted 10-12-2013 06:20 PM

Very cool Bob. You always amaze me with all the different things you come up with for plywood…great job.

-- Dave.......If at first you don’t succeed redefine success....

View Jim Jakosh's profile

Jim Jakosh

27002 posts in 4390 days

#5 posted 10-12-2013 09:14 PM

Neat one, Bob. I have seen baskets done like that and wondered how they get a spiral pattern to follow. Did you then have to back the blade out all the way? It seems you would, but do you turn off the was to do that?..............Jim

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

View peteg's profile


4438 posts in 4108 days

#6 posted 10-12-2013 09:15 PM

Getting a bit tricky now Mate :), what a great idea, you’ll get it 110% right Bob, lets see the next @ you 10*
well done Bud

-- Pete G: If you always do what you always did you'll always get what you always got

View BobWemm's profile


3047 posts in 3211 days

#7 posted 10-14-2013 07:26 AM

Really cool Bob, just goes to show that there is nothing that cannot be done. All that is required is a bit of IMAGINATION. great Job.

-- Bob, Western Australia, The Sun came up this morning, what a great start to the day. Now it's up to me to make it even better. I've cut this piece of wood 4 times and it's still too damn short.

View Cliff 's profile


2049 posts in 3008 days

#8 posted 10-22-2013 06:36 AM

Bob, I just had a look at your plywood bowl and I thought that looks pretty good…..Then I took another look and realized it was collapsible….That Is Amazing!!!!! It never entered my mind that a bowl could be collapsible.

Well Done Bob.



-- Cliff Australia : Snoring is good. It blows away all the Sawdust.

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