How To: Square Natural Edge Bowl #4: The secret - Jamb Chuck to remove tenon - CAREFULLY!

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Blog entry by Underdog posted 11-16-2021 03:08 AM 555 reads 0 times favorited 2 comments Add to Favorites Watch
« Part 3: Reverse Chuck and Turn the Bowl Part 4 of How To: Square Natural Edge Bowl series no next part

So the next step is to remove the tenon. This is a bit tricky because you need to center up the blank to ensure concentricity of the base.

So I mount up a jam chuck that will fit the bowl nicely, and place some padding to protect the finished inside of the bowl. I just used a folded up blue shop towel and it seemed to work nicely.

Remember how I said the tailstock dimple in the tenon was important? This is why. You bring up that tailstock center and place it on that dimple to make sure the bowl is center up.
Once you have the wings turning in the same plane it’s time to turn away that tenon.

Be very careful because at this point you could really screw up. Delicately turn the tenon down to a small cone. Sharp tools and careful presentation of the gouge is crucial here.

I like to use a small skew to cut a small recess in the foot, and a ring in the center. But that’s just me. You can make it slightly concave so it will sit flat if that’s easier.

Once you have that tenon turned nearly off. STOP.

Remove the bowl from the lathe, turn it upside down on a flat surface and get a small gouge out. I usually just break off the remainder of the tenon and hope it’s still just proud of the surface. Then I carefully gouge off the little raised nub… and sand.

Then finish off with Wipe-On Poly. And done.

-- Jim, Georgia, USA

2 comments so far

View a1Jim's profile


118296 posts in 4861 days

#1 posted 11-16-2021 04:13 AM

Well done, I Jamb chuck to the rescue.


View bushmaster's profile


4148 posts in 3566 days

#2 posted 11-18-2021 03:07 PM

Thanks for the info. I am starting to do some lathe work now. rebuilt my lathe and it is much nicer to use now.

-- Brian - Hazelton, British Columbia

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