I had having tear out problems with my box joint jig and decided to blame it
on the craftsman 1/2" straight bit that came free with my router table.
I bought a MLCS 1/2" spiral bit. It worked great, giving me no tear out on
the same wood that was a problem before. But when I went to assemble the
box, it wouldn't go together, the cuts were too small. In desperation I
recut it with the old bit and it went together fine. I was very surprised
at that, figuring that the spacing would be off and I would just have a pile
of scrap, but sometimes you get lucky.
Anyhow, I measured the cuts from the craftsman at 0.504" and the MLCS as
0.496". Presumably my router has no run out at all. <g> (the spacing on
the jig is 0.490").
I can accept that the craftsman is oversized, a bit extra for sharpening
maybe; but is 4 thousanths undersized acceptable for the MLCS. Okay, it was
real expensive, but it wasn't exactly cheap either.
Is this something to complain about, or an acceptable tolerance?