53
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" (171mm), flat on table is 13-1/2"
(343mm).
• Follow the table for helpful hints on cut-
ting 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.
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 bevel detents at 33.9°. These de-
tents allow you to easily position most
crown molding flat on the table and make
precise cuts for 90° corners. NOTE: These
detents cannot be used with 45° crown
molding. These detents are only for use
with crown molding that has a 38° “spring
angle.”
See also page 56 for miter and bevel angle
charts for cutting crown molding that has
38° and 45° spring angles. Each chart lists
the exact miter and bevel settings required
for a wide range of corner angles.
Even though these angles are standards,
most rooms do not have angles of exactly
90°; therefore, you will need to fine-tune
your settings.
The optional Bosch GAM 220 MF and GAM
270 MFL Digital Anglefinder/Protractors
measure spring angles and corner angles,
then automatically determine the exact
miter and bevel settings necessary to make
each crown molding cut fit perfectly.
BASE MOLDING CUTTING INSTRUCTIONS
LOCATION OF
MOLDING ON SAW
Molding in Vertical Position:
Back of molding is against
the fence
Molding in Horizontal
Position: Back of molding
is flat on the table
Bevel Angle Bevel = 0º Bevel = 45º
Molding piece being cut
To left of
corner
To right of
corner
To left of
corner
To right of
corner
Inside
corner of wall
Miter Angle Left at 45º Right at 45º 0º 0º
Position
of molding
on saw
Bottom
against table
Bottom
against table
Top against
fence
Bottom
against fence
Finished side
Keep left
side of cut
Keep right
side of cut
Keep left
side of cut
Keep left
side of cut
Outside
corner of wall
Miter Angle Right at 45º Left at 45º 0º 0º
Position
of molding
on saw
Bottom
against table
Bottom
against table
Bottom
against fence
Top against
fence
Finished side
Keep left
side of cut
Keep right
side of cut
Keep right
side of cut
Keep right
side of cut
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