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Shrinkage

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Forum topic by Paxton612 posted 10-27-2018 01:57 PM 457 views 0 times favorited 7 replies Add to Favorites Watch
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Paxton612

1 post in 448 days


10-27-2018 01:57 PM

Topic tags/keywords: unstable shrinkage swelling cocobolo cherry

I’ve made some pieces out of Cherry, the pieces keep moving. Farm table and pub table. On the farm I put a small bread board on each end. A year later I’ve had to trim the bread board just to have it two weeks later be to small. What gives?


7 replies so far

View mahdee's profile

mahdee

4291 posts in 2369 days


#1 posted 10-27-2018 02:05 PM

I am not sure exactly what you mean about moving and getting too small. Can you take some picture of them?
If you glued the breadboard, that could have been the cause. If the tabletops buck and or split, it is more likely that they weren’t installed so the top could expand and shrink freely.

-- earthartandfoods.com

View splintergroup's profile

splintergroup

3194 posts in 1824 days


#2 posted 10-27-2018 02:19 PM

Your description sounds like wood expansion/contraction die to moisture content. Was it kiln dried?

Check out the shrinkulator to get an idea of what movement to expect.

View jdh122's profile

jdh122

1120 posts in 3419 days


#3 posted 10-27-2018 03:39 PM

Breadboards are great. But they are only the “right” size twice a year when the humidity is the same as when the piece was made. The table will expand and contract forever, while the breadboard will never get longer or shorter, leaving the table too wide or too narrow for the breadboard most of the time.

-- Jeremy, in the Acadian forests

View 000's profile

000

2859 posts in 1501 days


#4 posted 10-27-2018 03:51 PM

When wood expands and contracts and does it more across the width than it does on the length.
So your bread board ends, the length, won’t expand at the same rate as the width of all the planks.

View Aj2's profile

Aj2

2647 posts in 2399 days


#5 posted 10-27-2018 05:21 PM

That’s how Cherry is. Is the table still beautiful and usable.

-- Aj

View Kazooman's profile

Kazooman

1408 posts in 2554 days


#6 posted 10-27-2018 05:51 PM

Seinfeld fans would tell you to ask George Costanza about shrinkage. He is an expert.

View AlaskaGuy's profile

AlaskaGuy

5516 posts in 2911 days


#7 posted 10-27-2018 06:15 PM

Here’s a whole page of articles and videos on how/why this is happening to your table.

https://www.google.com/search?q=Wood+movement+in+woodworking&ie=utf-8&oe=utf-8&client=firefox-b-1

-- Alaskan's for Global warming!

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