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G0663 12½" Planer
The species of wood, as well as its condition, has
a dramatic effect on the depth of cut the planer
can effectively take with each pass. The harder
the wood (as illustrated by its shear strength), the
shallower the depth of cut should be.
Commonly used hardwoods and their associated
shear strengths are illustrated in
Figure 12.
Wood Types
Figure 12. Common hardwood shear strengths.
Type Shear (PSI)
Black Locust 2,480
Sugar Maple 2,330
Pecan Hickory 2,080
White Oak 2,000
White Ash 1,950
Black Cherry 1,700
American Elm 1,510
Black Walnut 1,370
Red Alder 1,080
Basswood 980
Cottonwood 930
Increasing
Difficulty
Similarly, common softwood shear strengths are
displayed in
Figure 13.
Figure 13. Common softwood shear strengths.
Type Shear (PSI)
Western Larch 1,410
Tamarack 1,280
Douglas Fir 1,160
Alaska Cedar 1,130
Sitka Spruce 1,150
Sugar Pine 1,050
Cypress 1,000
Redwood (OG) 940
Red Cedar 860
White Pine 850
Balsam Fir 710
Increasing
Difficulty