Need help - Is this excessive moisture?

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Forum topic by CTW posted 06-04-2015 09:56 PM 748 views 0 times favorited 4 replies Add to Favorites Watch
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48 posts in 1336 days

06-04-2015 09:56 PM

Topic tags/keywords: maple milling

I purchased a small piece of hard maple a few days ago to make jig runners. I was ready to run it over the jointer, but I noticed the color variation marked in the photo and I am wondering if this is excessive moisture and if I should wait. As you probably guess, I do not have a moisture meter and I am very much a novice. Thanks for your opinions.

4 replies so far

View Kazooman's profile


1030 posts in 1978 days

#1 posted 06-04-2015 10:32 PM

I think it is just the result of where the piece came from in the log. My guess is that if you have the board sitting like that and then lift it up and look at the end grain it will be curving downward. The color you see is the difference between heartwood and sapwood or sapwood and cambium. The grain on the face also suggests that this is not a piece from the heart of the tree or quartersawn.

If you are making jig runners, you should choose the stock very carefully. Something with very straight grain. Movement in the wood from pieces with curving grain can lead to either binding of the runner or having it loosen up in the matching groove. You might want to look into one of the numerous metal runners that are available. They offer adjustments to fit them exactly to your needs. I made many jigs with my own hardwood runners for years, and they served me well. However, I think the commercial runners are a much better way to go.

View bobasaurus's profile


3485 posts in 3210 days

#2 posted 06-04-2015 10:33 PM

That just looks like weathering before it has been planed/jointed off. Every rough maple board I’ve used is that same color before surfacing.

-- Allen, Colorado (Instagram @bobasaurus_woodworking)

View CTW's profile


48 posts in 1336 days

#3 posted 06-04-2015 10:43 PM

Thank you, I am going to try running it and see what I get.

View Ghidrah's profile


667 posts in 1248 days

#4 posted 06-05-2015 02:01 AM

I have a slab of quilted maple and it has 3 different colors in it, one side has a reddish tinge the opposite bubble back and forth from yellow to white

-- I meant to do that!

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