Bosch Power Tools CM12 manual Saw Operations, Cutting Base Molding, Cutting Crown Molding

BM 2610021316 10-11 E:BM 2610021316 10-11 E.qxp 10/17/11 11:02 AM Page 26

Saw Operations

Cutting Base Molding

Base molding can be cut vertical against fence or flat on the table. The maximum size that can be vertical on the fence is 6-3/4.

Follow the table for helpful hints on cutting base molding for corners that have 90° angles.

	BASE MOlDING CUTTING INSTRUCTIONS
LOCATION OF		Molding in Vertical Position:		Molding in Horizontal Position:
	MOLDING	Back of molding is		Back of molding is flat
	ON SAW	against the fence		on the table
Bevel Angle		Bevel = 0°		Bevel = 45°
Molding Piece Being Cut		To left of	To right of	To left of	To right of
		corner	corner	corner	corner
Inside	Miter Angle	Left at 45°	Right at 45°	0°	0°

corner of wall

Right

Outside

corner of wall

Left Right

	Position of	Bottom	Bottom	Top against	Bottom
molding on Saw		against table	against table	fence	against fence
	Finished	Keep left	Keep right	Keep left	Keep left
	side	side of cut	side of cut	side of cut	side of cut
	Miter Angle	Right at 45°	Left at 45°	0°	0°
	Position of	Bottom	Bottom	Bottom against	Top against
molding on Saw		against table	against table	fence	fence
	Finished	Keep left	Keep right	Keep right	Keep right
	side	side of cut	side of cut	side of cut	side of cut

Cutting Crown Molding

Crown molding cuts must be positioned properly to fit exactly.

There are two ways to cut crown molding: flat on table or angled to table and fence.

Crown molding’s “spring angle” is the angle between the back of the molding and the bottom flat surface that fits against the wall.

This miter saw has special miter detents at 31.6° and a bevel detent at 33.9°. These detents allow you to easily position most crown moldings flat on the table and make precise cuts for 90° corners. (These detents are only for use with crown moldings that have a 38° “spring angle”.) NOTE: These detents cannot be used with 45° crown mold- ing.

See also pages 29 for miter and bevel angle charts for cutting crown moldings that have 38° and 45° spring angles and the material is laid flat on the miter saw base. Each chart lists the exact miter and bevel settings required for a wide range of cor- ner angles.

Even though these angles are standards, most rooms do not have angles of exactly 90°, there- fore, you will need to fine tune your settings.

The optional Bosch DAF220K MiterFinder Digital Anglefinder/Protractor measures spring angles and corner angles, then automatically de- termines the exact miter and bevel settings necessary to make each crown molding cut fit perfectly.

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