Craftsman 137.212521 Operator's Manual page 23

CUTTING BASEMOLDING (FIG.HH)
Basemoldings a ndmany othermoldings c anbecuton
a compound m itersaw.Thesetupofthesawdepends
on molding characteristics andapplication, asshown.
Perform practice cutson scrapmaterial toachieve best
results:
1. Always makesuremoldings r estfirmlyagainst f ence
andtable.Usehold-down, crownmolding viseor
C-clamps, whenever p ossible andplace tapeonthe
areabeingclamped to avoid marks.
2. Reduce splintering b ytaping thecutareapriorto
making thecut.Mark thecutlinedirectly onthetape.
3. Splintering t ypically happens d uetoanincorrect
bladeapplication a ndthinness ofthe material.
Fig.HH
Miter sawtable
Miter a t45°,bevel at0°
m
F
e
n
o
e _
Miter sawtable _
Miter at 0°, bevel at 45 o
NOTE: Always perform a dry run cut so you can
determine if the operation being attempted is possible
before power is applied to the saw.
CUTTING CROWN MOLDING (FIG. II, JJ)
Your compound miter saw is suited for the difficult task
of cutting crown molding. To fit properly, crown molding
must be compound-mitered with extreme accuracy. The
two surfaces on a piece of crown molding that fit flat
against the ceiling and wall 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 °.
In order to accurately cut crown molding for a 90 ° inside
or outside corner, lay the molding with its broad back
surface flat on the saw table.
When setting the bevel and miter angles for compound
miters, remember that the settings are interdependent;
changing one changes the other, as well.
Fig. II
FI
el
nl
Ol
Miter saw table
Bevel/Miter Settings
Fig. JJ
Settings for standard crown molding lying flat on
compound miter saw table
Inside Corner
\
\
\
Outside Corner
Compound Cut Crown Moldings
NOTE: The chart below references a compound
cut for crown molding ONLY WHEN THE ANGLE
BETWEEN THE WALLS EQUALS 90 °.
KEY] BEVEL MITER SETT NG[SETT NG l TYPE OF CUT
Inside corner=Left side
L J 3-9° 131.6°
].Right
R J33"9° .[Left 131"6°
OL P 3"9° [LeftJ318 °
0 339o 131 80
[Right
111 Position top of moldillg against fence
L
Miter table set at RIGHT 31 6'.
LEFT side is finished piece.
inside corner=Right side
111 Position bottom of molding against fence.
L
Miter table set at LEFT 31 6°
LEFT side is finished piece.
Outside corner=Left aide
111 Position bottom of molding against fence.
L
Miter table set at LEFT 81 6°
RIGHT side is finished piece.
Outside corner=Right side
111 Position top of molding against fence
L
Miter table set at RIGHT 31 6°.
RIGHT side is finished piece.