Model G0505 (Mfg. since 4/04)
-17-
Planing Tips
• Use the full width of the planer. Alternate
between the left, the right and the middle
when feeding lumber into the planer. Your
knives will remain sharp much longer.
• Scrape all glue off of joined boards before
planing.
• Plane ONLY natural wood fiber. DO NOT
plane wood composites.
• Surface the workpiece with the grain. NEVER
feed end-cut or end-grained lumber into your
planer.
• Keep your work area clear.
• Always true any cupped or warped stock on
a jointer before planing.
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 planer depth of cut to be taken for
good results.
Note: The Janka Hardness Rating is expressed
in the 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.
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