Thread: Nub Woodwork question . . .

Hi R,

There are lots of references on the net, here are a couple http://liutaiomottola.com/myth/quartersawn.htm http://www.taunton.com/finewoodworki....aspx?id=28324 and http://www.mimf.com/archives/quartersawn.htm

Sebastiaan

Originally Posted by Sebastiaan56

Hi R,

There are lots of references on the net, here are a couple http://liutaiomottola.com/myth/quartersawn.htm http://www.taunton.com/finewoodworki....aspx?id=28324 and http://www.mimf.com/archives/quartersawn.htm

Sebastiaan

Cheers,

Thanks Sebastiaan. I checked here first so I would get correct references from someone who knows, rather than madly start googling and ending up with anything.

Cheers,

R

hi Sabastiaan and raksasa, I just had a quick look at those links- except the video, can't get it down so maybe it makes this point- I didn't see any reference to medullary rays ( not sure of correct spelling of medullary ) and I was under the impression that quarter sawing is all about the alignment of the rays. They go sideways through the tree from the centre out to the edge, so if a board is quarter sawn, that is sawn with the long edge following the radial line of the log, then the medullay rays run right across the with of the board. They stiffen the board across the grain considerable and resist movement due to changes in moisture.
I don't know that it had much effect on the stiffnes and stability along the grain, only across it.
Knowing where the rays are in a piece can help predict how it will move when the weather changes. A common example would be a slab sawn board where the anular rings go in a cresent shape on the endgrain. That would mean that the board is perfectly flat sawn in the centre and the rays will be at 90 degrees to the face. Towards the edges of the board the rays will start to lay over ( staying 90 degrees to the anular rings) The effect being that the movement across the grain is not resisted at all in the centre of the board, but towards the edge of the board where the rays are strting to go across the grain, the movement is resisited gradualy as it get closer to the edge. The result it that the board shrinks much more in the middle than the edges and cups up in the familiar way.
I fear I'm being way too verbal as usual, just couldn't help pointing that out
Cheers!
jack

Hi Jack,

I made the mistake of making a board for carving the mando out of a piece of slabsawn pine. That was November, it is now gracefully curved as you describe.

I didnt know about the rays, thx

Sebastiaan