Major warppage

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Blog entry by JoeinGa posted 07-29-2015 07:29 PM 1260 reads 0 times favorited 11 comments Add to Favorites Watch



Back in December 2014 I cut 2 bowls from the same log of blackgum. I was “kinda-sorta ok” with how they came out but I knew they were not the best things in the world. It was just some more practice for my lathe work. I soaked almost a PINT of mineral oil into them, they were like a sponge sucking that oil in.

Fast-forward 8 months to yesterday and I spotted them on the shelf in the shop and brought them down to have a look. Wow! I remember folks saying that since they were still fairly green, they’d probably crack and split, but that hasn’t happened at all. They didn’t split, but they certainly DEFORMED big time! Have a look at them now. They’re actually OVAL, and the top lip has deformed so much that they dont even come close to stacking flat any more.

The three pix above show them when they were fresh cut, and here’s what they look like now.






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11 comments so far

View Mark Wilson's profile

Mark Wilson

2696 posts in 1671 days

#1 posted 07-29-2015 08:56 PM

They’re keepers, Joe. Not, necessarily, stackers anymore. But,definitely keepers. Isn’t it wonderful to see the artiste within a piece of wood express itself? See: my Large Peach Bowl.

-- Mark

View robscastle's profile


6675 posts in 2812 days

#2 posted 07-29-2015 09:49 PM

Oh yes thats mother nature at work for you, but as Mark said they are keepers, and a good example of timber shape changing and shrinkage characteristics.

Its a remarkable amount of change without fatigue cracks or splits occuring!

-- Regards Rob

View Jerry's profile


3313 posts in 2256 days

#3 posted 07-29-2015 10:25 PM

Okay, this is really bizarre to me. You would think that the oil would make the wood swell in the other direction. They’re still beautiful Joe. Great work.

-- There are good ships and there are wood ships, the ships that sail the sea, but the best ships are friendships and may they always be.

View stefang's profile


17039 posts in 3942 days

#4 posted 07-30-2015 11:49 AM

I’m not surprised at the warpage Joe. If you turn end grain bowls to final thickness and even thickness you can finish turn them in o e go and they will not warp.

-- Mike, an American living in Norway.

View Porchfish's profile


860 posts in 3140 days

#5 posted 07-30-2015 12:17 PM

Hi Joe, the movement is not unexpected i Gum ! Sweet, Sour, Black,Blue, makes no difference, It is the nature of the beast. In particular note the excessive movement in line with the heart running along the top side. It is especially prevalent in the pieces you have photographed rim-on-rim. The good thing is that you avoided cracking and breakage that might have been more likely to have appeared had the heart not been up high on those vessels. The wood is gorgeous and they of course are keepers ! Remember that if you eliminate the heart from your blank the end product will be more stable, no matter how green when turned. Keep working and bringing life to rare wood finds. goodon’ya Joe !

-- The pig caught under the fence is always the one doing all the squealing !

View WoodNSawdust's profile


1417 posts in 1784 days

#6 posted 07-30-2015 01:25 PM

Figure out how to mount them back on the lathe, cleanup the bottom so that they sit on a table well, and advertise them as hand turned oval bowls. Then sit back and watch everyone be amazed at your turning skills.

-- "I love it when a plan comes together" John "Hannibal" Smith

View doubleDD's profile


8972 posts in 2651 days

#7 posted 07-30-2015 07:01 PM

When they warp they become pieces of art. Yep, you have some major warp-page. How do you store them Joe before their final turning?

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

View JoeinGa's profile


7741 posts in 2615 days

#8 posted 07-30-2015 07:12 PM

Thanks folks. Yes I would have thought they would have split at a minimum, and I also thought the warp would have gone the other way. Surprisingly the bottoms are still fairly flat. I didn’t even consider re-mounting them on the lathe because they’re warped so bad I’d surely break thru at least one side, and maybe both sides.

Dave, I really didn’t so anything as far as prep for storage. I just set them on the shelf and waited to see what would happen.

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View doubleDD's profile


8972 posts in 2651 days

#9 posted 08-01-2015 03:52 AM

Joe, there was one time I wanted the bowl to warp as much as possible to get that oval look. I turned it down to about 90% and left it for 4 months to dry out before going back to it. Nothing ever happened. Dried up nicely, no cracks, almost perfect. Go figure. It was a piece of Oak.

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

View JoeinGa's profile


7741 posts in 2615 days

#10 posted 08-01-2015 01:40 PM

Sometimes we just cant get what we want, can we Dave? LOL

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

View helluvawreck's profile


32086 posts in 3474 days

#11 posted 08-01-2015 01:42 PM

That’s pretty amazing. Thanks for the interesting post, Joe.

helluvawreck aka Charles

-- helluvawreck aka Charles,

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