Bosch Power Tools GCM12SD manual Cutting Base Molding, Cutting Crown Molding

BM 2610007877 04-10:BM 2610007877 04-10.qxp 4/26/10 8:13 AM Page 45

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 6-1/2", flat on table is 13-1/2".

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

• Cutting base molding can be done either as a chop cut or a slide cut depending on the size of the workpiece.

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 corner	To right of corner	To left of corner	To right of corner
Inside	Miter Angle	Left at 45°	Right at 45°	0°	0°

corner of wall

ft	Right
Le

Outside

corner of wall

	t
	h
	ig
Left	R

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

See also pages 46 & 47 for miter and bevel angle

properly to fit exactly.

charts

for

cutting crown

molding

that has

There are two ways to cut crown molding: flat on

38° and 45° spring angles. Each chart lists the exact

miter and bevel settings required for a wide range of

table or angled to table and fence.

corner angles.

Crown molding’s “spring angle” is the angle between

Even though these angles are standards, most

the back of the molding and the bottom flat surface

rooms do not have angles of exactly 90°; therefore,

that fits against the wall.

you will need to fine-tune your settings.

This miter

saw has special

miter

detents at

The

optional

Bosch

DAF220K

MiterFinder

31.6°

and

bevel

detents

at

33.9°.

These

Digital

Anglefinder/Protractor

measures

spring

detents

allow you

to easily position

most

crown

angles and corner angles, then automatically

molding

flat

on the

table

and

make

precise cuts

determines

the

exact

miter

and bevel

settings

for 90° corners. NOTE: These detents cannot be

used with 45° crown molding. These detents are only	necessary to make each crown molding cut fit
	perfectly.
for use with crown molding that has a 38° “spring
angle.”
	45.