Cutting Crown Molding - Craftsman 315.212040 Operator's Manual

CUTTING CROWN MOLDING
Your compound miter saw does an excellent job of cutting
crown molding. In general, compound miter saws do a
better job of cutting crown molding than any other tool
made.
In order to fit properly, crown molding must be compound
mitered with extreme accuracy.
The two contact surfaces on a piece of crown molding
that fit flat against the ceiling and the wall of a room are at
angles that, when added together, equal exactly 90. Most
crown molding has a top rear angle (the section that fits
flat against the ceiling) of 52 and a bottom rear angle (the
section that fits flat against the wall) of 38 °.
LAYING MOLDING FLAT ON THE
MITER TABLE
See Figure 32.
To use this method for accurately cutting crown molding
for a 90 inside or outside corner, lay the molding with its
broad back surface flat on the miter table and against the
fence.
52° CEILING
38_WL
L FENCE
TOPEDGEAGAINSTFENCE=
LEFTSIDE, INSIDECORNER
RIGHT SIDE, OUTSIDECORNER
MITER TABLE
0 0
When setting the bevel and miter angles for compound
miters, remember that the settings are interdependent;
changing one angle changes the other angle as well.
Keep in mind that the angles for crown moldings are very
precise and difficult to set. Since it is very easy for these
angles to shift, all settings should first be tested on scrap
molding. Also most walls do not have angles of exactly
90, therefore, you will need to fine tune your settings.
When cutting crown molding by this method the bevel
angle should be set at 33.85 The miter angle should be
set at 31.62 either right or left, depending on the desired
cut for the application. See the chart below for correct
angle settings and correct positioning of crown molding
on miter table.
The settings in the chart below can be used for cutting All
Standard (U.S.) crown molding with 52 ° and 38 angles.
The crown molding is placed flat on the miter table using
the compound features of your miter saw.
INSIDE
CORNER
OUTSIDE
FENCE CORNER
BOTTOMEDGEAGAINSTFENCE=
• RIGHT SIDE, INSIDE CORNER
• LEFTSIDE, OUTSIDECORNER
MITERTABLE
CROWNMOLDINGFLATONMITER TABLE
Fig. 32
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