Re: I thought beech was used...
Larry Williams
>Hi Denis,
I've been following this thread with some interest but it could turn out being a real time sink for me.
First of all, the traditional woodworking definition of "stable" is that the ratio of tangential and radial shrinkage from green to dry is as close to one to one as possible. For woodworkers using dimensional lumber like 1X it can be a serious issue. The differential of the two is one of the main causes of defects or problems in woodworking.
For planes, especially bench planes, this isn't the wood movement issue. The issue lies in the differential in moisture content between the core and surface areas and the resulting surface distortions as they relate to critical surfaces of a plane like the sole or bed.
Beech, of all the woods mentioned in this thread has one of the lowest rates of movement along radially sawn (quarter sawn) face. That's very important because it's where the wedge is housed. Like any angled joints like miter joints in woodworking, angles change with moisture because of wood's anisotropic nature. All other features of a wooden plane don't mean much if the wedge doesn't properly fit and solidly secure the iron.
I find beech incredibly friendly to working with hand or power tools. Maple, cherry and other woods which make pretty good planes aren't as easy to work.
Another issue would be steaming or boiling of beech. Experience has led me to believe it was done to sterilize the wood. Beech is incredibly susceptible to fungal growth. It doesn't take more than one session of scrubbing each board of a big load of wood with bleach and a fungicide to teach you this one. We buy our wood green because there isn't an option. When our supplier gets the custom cut wood in, we have to be ready to go get it immediately. He may bring in a number of different woods at the same time and the beech will almost immediately start turning black from fungus while cherry, oak, walnut and others aren't effected. Simply sterilizing the surface of the wood with a fungicide eliminates the problem and steaming would do the same thing.
All in all, when you list all the properties of beech as it applies to plane making and compare them to the properties of other woods, beech will come out far superior.
Unless a plane is used on the arris of a corner, wear isn't an much of an issue in a wooden plane. I consider wear of the iron through sharpening to have a much quicker negative effect.
Time�s up and I need to get back to the shop.