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Shrinkage

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Forum topic by Paxton612 posted 10-27-2018 01:57 PM 405 views 0 times favorited 7 replies Add to Favorites Watch
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Paxton612

1 post in 266 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 2187 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

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splintergroup

2728 posts in 1642 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

1078 posts in 3237 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

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000

2859 posts in 1319 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

2321 posts in 2217 days


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

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

-- Aj

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Kazooman

1325 posts in 2372 days


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

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

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AlaskaGuy

5316 posts in 2728 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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