cessive “land” on a knife. Land results
when knives in a planer are “jointed”
to get them in the same cutting circle.
Carbide knives often have too much
land as they cannot be sharpened as
keenly as HSS.
QWhat is the difference be- tween No. 1 Common and No. 2 Common hardwood
AThe main difference, within our woodworking in- dustry that does not make products that have knots, is
A second difference is the amount
of large clear area. No. 2 Common has
less clear area than No. 1 Common. But
if you took a saw and cut out the defects in No. 1 Common and compared
it to the amount of defects in No. 2, the
difference will be only a few percentage points.
That is, you will get nearly the same
yield, but the pieces will be smaller
on average with No. 2 Common. If
knots are not a defect, then yields will
be really close. Many cabinet shops
that use a lot of 20-inch length pieces
prefer No. 2 Common lumber with its
somewhat lower yield, but with its big
drop in price. ;
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“Many people do not appreciate that sandpaper
dulls, so it needs to be changed maybe 30 percent
sooner than what is presently done.”
“Grain raising is
basically due to fibers
that were crushed
or pushed into the
wood surface during