Grizzly G0454 Manuale Utente
-25-
g0453/g0454 (Mfg. since 3/08)
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.
greatly affects the depth of cut the planer can
effectively take with each pass.
the chart in the figure below shows the Janka
hardness rating for a number of commonly
used species. the larger the number, the harder
the workpiece, and the less material should be
removed in any one pass for good results.
hardness rating for a number of commonly
used species. the larger the number, the harder
the workpiece, and the less material should 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.
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. the speed
that these rollers move the workpiece through the
planer is known as the feed rate.
through the planer while keeping it flat and provid-
ing a consistent rate of movement. the speed
that these rollers move the workpiece through the
planer is known as the feed rate.
generally, low feed rates are used for dimension-
ing passes, while higher feed rates are used for
finishing passes.
ing passes, while higher feed rates are used for
finishing passes.
figure 16 illustrates the three different positions
of the feed rate control knob:
of the feed rate control knob:
•
push the knob in to use the high feed rate (30
FpM for Model g0453, and 20 FpM for Model
g0454).
FpM for Model g0453, and 20 FpM for Model
g0454).
•
pull the know out to use the low feed rate of
16 FpM.
16 FpM.
•
Move the knob to the center position to place
the gearbox in neutral.
the gearbox in neutral.
High
Low
Neutral
figure 16. Feed rate control knob positions.