Cutting Crown Molding - Bosch PROFACTOR GCM18V-10SDN14 Operating/Safety Instructions Manual

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.
See the "Miter and Bevel Settings for Standard Crown Mold-
ing Cuts (When Workpiece Angled Against Fence)" table be-
low for helpful hints on cutting crown molding for corners that
have 90° angles.
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 molding flat on the table and make precise cuts
for 90° corners.
NOTE: These detents cannot be used with 45° crown mold-
ing. These detents are only for use with crown molding that
has a 38° "spring angle."
Also see "Crown Molding Lying Flat on Table" on page 46
for miter and bevel angles for cutting crown molding that has
38° and 45° spring angles. The table "Miter and Bevel Settings
Any Crown Molding Up To 6" (152mm)
NOTE: Always place
bottom edge against fence
Inside Corner
Left end (Fig. 52, A)
Use the left end of the cut
Right end (Fig. 52, B)
Use the right end of the cut
Outside Corner
Left end (Fig. 52, C)
Use the left end of the cut
Right end (Fig. 52, D)
Use the right end of the cut
Saw Operations
Miter and Bevel Settings for Standard Crown Molding Cuts
(When Workpiece Angled Against Fence)
Miter (Table) Bevel (Tilt)
Setting Setting
45° Right 0° Left
45° Left 0° Right
45° Left 0° Right
45° Right 0° Left
-44-
for Standard Crown Molding Cuts (When Workpiece Angled
Against Fence)" below 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.
Assumptions: Molding is milled consistently. Cor-
ner is 90°. For other corner angles, divide actual
measurement by 2.
Fig. 52
Inside
Corner
Fence
Outside
Corner
Top of
molding
against
fence
Table