Wood Types

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.

 

 

Type

Shear (PSI)

 

 

Black Locust

 

2,480

 

 

Sugar Maple

 

2,330

Increasing

Difficulty

Pecan Hickory

2,080

American Elm

1,510

 

 

White Oak

 

2,000

 

 

White Ash

 

1,950

 

 

Black Cherry

 

1,700

 

 

Black Walnut

 

1,370

 

 

Red Alder

 

1,080

 

 

Basswood

 

980

 

 

Cottonwood

 

930

Figure 12. Common hardwood shear strengths.

Similarly, common softwood shear strengths are displayed in Figure 13.

 

 

Type

Shear (PSI)

 

 

Western Larch

1,410

 

 

Tamarack

 

1,280

Increasing

Difficulty

Douglas Fir

 

1,160

Cypress

 

1,000

 

 

Alaska Cedar

 

1,130

 

 

Sitka Spruce

 

1,150

 

 

Sugar Pine

 

1,050

 

 

Redwood (OG)

940

 

 

Red Cedar

 

860

 

 

White Pine

 

850

 

 

Balsam Fir

 

710

Figure 13. Common softwood shear strengths.

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G0663 12½" Planer

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Grizzly G0663 owner manual Wood Types