Grizzly G0453PX - Manual (Page 30)

-24- Model g0453z/g0454z (Mfg. 1/09+)
Wood Hardness
the species of wood, as well as its condition,
greatly affects the depth of cut the planer can
effectively take with each pass.
the chart in figure 15 shows the Janka hardness
rating for a number of commonly used species.
the larger the number, the harder the workpiece,
and the less material to be removed in any one
pass for good results.
Note: The Janka Hardness Rating is expressed in
pounds of force required to embed a 0.444" steel
ball into the surface of the wood to a depth equal
to half the ball's diameter.
Species
Janka
Hardness
Ebony 3220
red Mahogany 2697
rosewood 1780
red pine 1630
sugar Maple 1450
White oak 1360
White Ash 1320
American Beech 1300
red oak 1290
Black Walnut 1010
teak 1000
Black Cherry 950
Cedar 900
sycamore 770
douglas Fir 660
Chestnut 540
hemlock 500
White pin 420
Basswood 410
Eastern White pine 380
Balsa 100
figure 15. Janka hardness rating for some
common wood species.
feed Rate
NOTICE
Only change the feed rate when the planer
is running, but DO NOT attempt to change
the feed rate during any cutting operations
or damage to the gearbox will result.
the infeed and outfeed rollers move the workpiece
through the planer while keeping it flat and provid-
ing a consistent rate of movement.
use the two feed rates as stated below:
Low Feed rate .......................... dimension pass
high Feed rate ............................Finishing pass
figure 16 illustrates the three different positions
of the feed rate control knob:
• push the knob in to use the high feed rate
(30 FpM for Model g0453z, and 20 FpM for
Model g0454z).
• pull the knob out to use the low feed rate of
16 FpM.
• Move the knob to the center position to place
the gearbox in neutral.
High
Low
Neutral
figure 16. Feed rate control knob positions.