Grizzly G0453, G0454 owner manual Wood Hardness Feed Rate, Species Hardness

Wood Hardness Feed Rate

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 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.

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.

	Janka
Species	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.

G0453/G0454 (Mfg. Since 3/08)

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.

Generally, low feed rates are used for dimension- ing passes, while higher feed rates are used for finishing passes.

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 G0453, and 20 FPM for Model G0454).

•Pull the know 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.

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.

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