Craftsman 137.21241 operating instructions Cutting Base Molding FIG. AA, Bevel/Miter Settings

CUTTING BASE MOLDING (FIG. AA)

Base moldings and many other moldings can be cut on a compound miter saw. The setup of the saw depends on molding characteristics and application, as shown.

Perform practice cuts on scrap material to achieve best results:

1.Always make sure moldings rest firmly against fence and table. Use hold-down or C-clamps, whenever possible, and place tape on the area being clamped to avoid marks.

2.Reduce splintering by taping the cut area prior to making cut. Mark cut line directly on the tape.

3.Splintering typically happens due to wrong blade application and thinness of the material.

Fig. AA

Fig. BB

F e n c e

Miter Saw Table

Bevel/Miter Settings

Fig. CC

Settings for standard crown molding lying flat on compound miter saw table

F	Workpiece
e
n
c
e

Miter Saw Table miter at 450, bevel at 00

F	Workpiece
e
n
c
e

Miter Saw Table

miter at 00, bevel at 450

Inside Cornor

OL OR

IL IR

Outside Cornor

NOTE: Always perform a dry run cut so you can determine if the operation being attempted is possible before power is applied to the saw.

CUTTING CROWN MOLDING (FIG. BB, CC)

Your compound miter saw is suited for the difficult task of cutting crown molding. To fit properly, crown molding must be compound- miterd with extreme accuracy.

The two surfaces on a piece of crown molding that fit flat against the ceiling and wall are at angles that, when added together equal exactly 90°.

Most crown molding has a top rear angle (the section that fits flat against the ceiling) of 52° and a bottom rear angle (the section that fits flat against the wall) of 38°.

In order to accurately cut crown molding for a 90° inside or outside corner, lay the molding with its broad back surface flat on the saw table.

When setting the bevel and miter angles for compound miters, remember that the settings are interdependent; changing one changes the other, as well.

NOTE: The chart below references a compound cut for crown molding ONLY WHEN THE ANGLE BETWEEN THE WALLS EQUALS EXACTLY 90°.

KEY	BEVEL	MITER	TYPE OF CUT
	SETTING	SETTING
		Inside corner-Left side
IL	33.9°	31.6° Right	1. Position top of molding against
			fence.

2.Miter table set at RIGHT 31.6°.

3.LEFT side is finished piece.

Inside corner-Right side

IR	33.9°	31.6° Left	1. Position bottom of molding
				against fence.
			2.	Miter table set at LEFT 31.6°.
			3.	LEFT side is finished piece.
		Outside corner-Left side
OL	33.9°	31.6° Left	1. Position bottom of molding
				against fence.
			2.	Miter table set at LEFT 31.6°.
			3.	RIGHT side is finished piece.
		Outside corner-Right side
OR	33.9°	31.6° Right	1. Position top of molding against
				fence.
			2.	Miter table set at RIGHT 31.6°.
			3.	RIGHT side is finished piece.

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