Grizzly G0689 - Manual (Page 22)

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g0689 13" 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. a greater
shear strength indicates a harder wood. a shal-
lower cut should be used with harder woods.
Commonly used hardwoods and their associated
shear strengths are illustrated in
figure 19.
Wood Types
figure 19. 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
d
ifficulty
Similarly, common softwood shear strengths are
displayed in
figure 20.
figure 20. 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
d
ifficulty