Miter Cuts - Bosch GCM18V-12SD Operating/Safety Instructions Manual

Miter Cuts

What's a Miter Cut?
• A "miter cut" is a cross-cut made with the
blade perpendicular to the horizontal table
(Fig. 44, 22). The blade is not tilted and the
bevel pointers are both on the 0° lines.
• Miter cuts can be made at any angle across
a workpiece within this saw's range, from
52° left to 60° right.
• The miter scale (19) shows the angle of
the blade relative to the saw's fence (12).
The miter pointer is attached to the table
(22) and indicates the saw's miter position
before the cut is made.
• Ten positive detents (18) are provided for
fast and accurate preset miter angles – lo-
cations are at 45°, 31.6°, 22.5°, 15° left and
right, and center at 0°. The right side has an
additional detent of 60°.
• The crown molding detents on the left and
right are at 31.6° for compound cutting 38°
"spring angle" crown molding lying flat on
the table. See "Cutting Crown Molding" on
page 45.
Fig. 46
16099221PH GCM18V-12SD OSI 20220506.indd 39
Saw Operations
• For precision settings at miter angles very
• A miter cut can be made either as a chop
Reading the Miter Scale
The miter scale (Fig. 44, 19 and Fig. 46) used
on this saw includes several scales of informa-
tion to help the user accurately preset this saw
before making the cuts.
Pitch angle information – The top section of
the miter scale (Fig. 46) shows angle settings
required to cut roof rafters to the "Pitch Angle"
system. 2/2, 4/12, 6/12, etc., are all pitch an-
gles. This system is based on using the English
"inches." A 6/12 pitch angle roof equals a ratio
of 6" "rise" for every 12" "run" (Fig. 47).
Crown molding information – There are miter
position settings for compound-cutting crown
molding flat on the table. Crown molding with
38° "spring angle" uses the 31.6 setting (with
detent) and crown molding with 45° "spring
angle" uses the 35.3 setting.
Miter scale information
Calibration information
Pitch angles for roofs
1 of 10
Detent Symbols
"31.6" detent position for cutting 38°
"spring angle" crown molding flat on table
"35.3" detent position for cutting 45°
"spring angle" crown molding flat on table
-39-
close to the miter detents, use the miter
detent override to prevent the detent from
automatically engaging the detent slot. See
"Miter Detent Override" on page 36.
cut or slide cut, depending on the width of
the workpiece.
5/6/22 12:16 PM