Cutting Base Molding; Cutting Crown Molding - Bosch 4412 Operating/Safety Instructions Manual

— Base molding can be cut vertical against fence or
flat on the table. The maximum size that can be
vertical on the fence is 4-1/4", flat on table is
10-1/4".
— Follow the table for helpful hints on cutting base
molding for corners that have 90° angles.
LOCATION OF
MOLDING
ON SAW
Bevel Angle
Molding Piece Being Cut
Inside Miter Angle
corner of wall
Position of
molding on Saw
Finished
Outside Miter Angle
corner of wall
Position of
molding on Saw
Finished
— Crown molding must be 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
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 molding.
Saw Operations

Cutting Base Molding

BASE MOLDING CUTTING INSTRUCTIONS
Molding in Vertical Position:
Back of molding is
against the fence
Bevel = 0°
To left of corner To right of corner To left of corner To right of corner
Left at 45°
Bottom
against table
Keep left
side side of cut
Right at 45°
Bottom
against table
Keep left
side side of cut

Cutting Crown Molding

— Cutting base molding can be done either as a
chop cut or a slide cut depending on the size of
the workpiece.
Molding in Horizontal Position:
Right at 45°
Bottom Top against
against table
Keep right
side of cut side of cut
Left at 45°
Bottom Bottom against
against table
Keep right Keep right
side of cut side of cut
— See also pages 29 & 30 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 corner 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
Digital Anglefinder/Protractor measures spring
angles and corner angles, then automatically deter-
mines the exact
necessary to make each crown molding cut fit
perfectly.
28.
Back of molding is flat
on the table
Bevel = 45°
0° 0°
Bottom
fence against fence
Keep left Keep left
side of cut
0° 0°
Top against
fence fence
Keep right
side of cut
DWM40L MiterFinder
miter and bevel settings