"toller" wrote in message
...
I have a shop-made box joint router jig. I have used it about 10 times and
it gives perfect joints.

Today I made two identical boxes at the same time; one out of quilted
maple and one of bubinga.

The bubinga is fine, just like the others. The maple is too tight. I ran
it again, but it is still too tight.
I ran them the same time on the same jig and same router bit. All four
bubinga are fine; all four maple are too tight.

I can't make any sense out of this, except that there is something weird
about quilted maple, but I can't imagine what that could even be. The
maple is air-dried, but it was dry when I bought it, and has been in my
shop for about 4 months.

Anyone make sense out of this?

This is not unusual. Even Leigh suggests that dove tails and box joints
made on their jigs will fit differently depending on the type wood that you
are using. Typically the harder woods will fit a bit tighter as they will
not compress as much as the softer woods.