A Better Bowl Holding Fixture

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Blog entry by poospleasures posted 02-12-2015 09:49 PM 1332 reads 1 time favorited 6 comments Add to Favorites Watch

I built this extended jaws fixture for holding bowls while finishing their bottoms a few months back. It has worked well for me when I had only eight of the tapered holding buttons. The problem was removing the extended jaws and the holding buttons and then screwing the buttons into the proper holes to use the jig with 8” and smaller bowls. To combat this time consuming configuration change picked up more buttons and 6mm mounting screws at Lowes. I can now leave the outer row of buttons in place for large bowls up to 12 1/4” and an inner row in place to hold an up to 8” bowl in place.

By moving just four of the buttons to the holes nearer to the center can hold smaller bowls down to 3 1/4” inside of their openings.

This pic shows an appx. 8” bowl mounted and the little bowl which was mounted in the last picture. Did not have to move any holding buttons to mount it.

This is a 11 1/4” bowl mounted. Again did not have to move any buttons to mount it.

This pic shows the original jumbo jaws and with the jumbo jaw extensions and buttons in place. The jaw extensions are made from 1/8” aluminum plate and drilled with additional rows of 6mm holes. The inner rows of holes must match with the holes in the original jumbo jaws. The jig stays mounted to an older 4jaw chuck.
This is a great time saver for me as it was taken 15 or 20 for all the reconfiguration for different bowl sizes. I have not thrown a bowl from this setup yet (knock on wood). I think it is due to the tapered rubber holding buttons. Good luck with yours and questions are welcome.

-- I,ve had amnesia for as long as I can remember. Vernon

6 comments so far

View stefang's profile


15512 posts in 2754 days

#1 posted 02-12-2015 10:40 PM

Your jaws look very well done, but I would suggest you look into making a Longworth chuck which would be even more flexible. If you are not aware of the LW chucks here is link that shows how to make one.

-- Mike, an American living in Norway.

View JoeinGa's profile


7366 posts in 1427 days

#2 posted 02-12-2015 11:34 PM

Hmmm, looks very interesting. Gonna hafta add to my fav’s

-- Perform A Random Act Of Kindness Today ... Pay It Forward

View kiefer's profile


4873 posts in 2087 days

#3 posted 02-13-2015 12:26 AM

Fine looking fixture build but as far as how it works I have no idea .


-- Kiefer

View doubleDD's profile


5056 posts in 1463 days

#4 posted 02-13-2015 01:54 AM

Vernon, this is a good idea. I also picked up some of those rubber stoppers from lowes last time you posted your flat jaw extension idea. I will be picking up more at Lowes soon. This will be a great time saver. Thanks.

-- Dave, Downers Grove, Il. -------- When you run out of ideas, start building your dreams.

View tomd's profile


2022 posts in 3190 days

#5 posted 02-13-2015 04:05 AM

PSI offers extended jaws made of a hard plastic and metal thread inserts with it comes several types of rubber buttons. I have a longworth chuck and the PSI set that looks a lot like yours, the extended jaw set works a lot better.

-- Tom D

View Roger's profile


19711 posts in 2224 days

#6 posted 02-13-2015 01:33 PM

Fantastic Vernon.

-- Roger from KY. Work/Play/Travel Safe. Keep your dust collector fed.

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