The Swelling Pin hole Conundrum

Don Mannino dmannino@kawaius.com
Wed, 19 Nov 1997 07:50:22 -0800


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Tom,

The simplest explanation is this: A hole in a piece of wood reacts to 
moisture in the same way as the "plug" of wood that used to be in the 
hole.

The exception to this is with the surface fibers, which can swell with 
added moisture and make the hole slightly smaller. Whether the hole 
actually gets smaller or larger depends on the type of wood, the grain 
orientation, and the presence of compression forces on the wood fibers 
(as with tuning pins holes).

Don Mannino RPT


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