Grizzly Model G0550 instruction manual Anti-Kickback Wood Species, Type Shear PSI

Anti-Kickback Wood Species

The anti-kickback fingers hang from a rod sus- pended across the front of the cutterhead casting. Check the fingers to ensure that they swing freely and easily. See Figure 18.

DO NOT apply oil or other lubricants to the anti-kickback fingers. Oil or grease will attract dust and restrict movement of the fingers, which could result in damage to your workpiece, the planer, or possibly serious injury to the operator.

Anti-kickback Fingers

Figure 18. Anti-kickback fingers.

The species of wood, as well as its condition, have a dramatic effect on planing ability. The harder the wood (as illustrated by its shear strength), the more difficult it will be to plane. A brief listing of common hard and soft woods in relation to their shear strengths and planing diffi- culty is listed below.

		Type	Shear (PSI)
		Black Locust		2,480
		Sugar Maple		2,330
		Pecan Hickory		2,080
Increasing	Difficulty
		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
		Type	Shear (PSI)
		Western Larch		1,410
		Tamarack		1,280
		Douglas Fir		1,160
Increasing	Difficulty
		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

-22- G0550/G0551 15" Planer