47
EnGLIsH
– EXAMPLES –
NUMBER OF SIDES
MITRE OR BEVEL ANGLE
4
45°
5
36°
6
30°
7
25.7°
8
22.5°
9
20°
10
18°
The chart assumes that all sides are of equal length. For a shape that is not
shown in the chart, use the following formula: 180º divided by the number
of sides equals the mitre (if the material is cut vertically) or bevel angle (if
the material is cut laying flat).
Cutting Compound Mitres (Fig. R)
A compound mitre is a cut made using a mitre angle and a bevel angle at
the same time. This is the type of cut used to make frames or boxes with
slanting sides like the one shown in Figure R.
nOTE:
If the cutting angle varies from cut to cut, check that the bevel lock
knob and the mitre lock handle are securely locked. These must be locked
after making any changes in bevel or mitre.
The table below will assist you in selecting the proper bevel and mitre
settings for common compound mitre cuts. To use the chart, select
the desired angle A (Fig. R) of your project and locate that angle on the
appropriate arc in the chart. From that point follow the chart straight
down to find the correct bevel angle and straight across to find the correct
mitre angle.
Set your saw to the prescribed angles and make a few trial cuts. Practice
fitting the cut pieces together until you develop a feel for this procedure
and feel comfortable with it.
Example: To make a 4-sided box with 26º exterior angles (Angle A, Fig. R),
use the upper right arc. Find 26° on the arc scale. Follow the horizontal
intersecting line to either side to get mitre angle setting on saw (42°).
Likewise, follow the vertical intersecting line to the top or bottom to get the
bevel angle setting on the saw (18°). Always try cuts on a few scrap pieces
of wood to verify the settings on the saw.
SET THIS BEVEL ANGLE ON SAW
SET THIS MITER ANGLE ON SAW
ANGLE OF SIDE OF BOX (ANGLE "A")
SQUARE BOX
6 SIDED BOX
8 SIDED BOX
Cutting Base Molding (Fig. S)
Straight 90º cuts:
Position the wood against the fence and hold it in place as shown in
Figure S. Turn on the saw, allow the blade to reach full speed and lower the
arm smoothly through the cut.
Cutting Base Molding Up to 89 mm High Vertically Against
the Fence
Position material as shown in Figure S.
All cuts should be made with the back of the molding against the fence and
with the bottom of the molding against the table.
INSIDE CORNER
OUTSIDE CORNER
Left side
Mitre left 45°
Save left side of cut
Mitre right 45°
Save left side of cut
Right side
Mitre right 45°
Save right side of cut
Mitre left 45°
Save right side of cut
Material up to 89 mm can be cut as described above. The width of the material cannot exceed
19 mm.
Cutting Crown Molding (Fig. T, U)
In order to fit properly, crown molding must be compound mitred with
extreme accuracy.
The two flat surfaces on a given piece of crown molding are at angles that,
when added together, equal exactly 90°. Most, but not all, crown molding
has a top rear angle (the section that fits flat against the ceiling) of 52° and a
bottom rear angle (the part that fits flat against the wall) of 38°.
Your mitre saw has special pre-set mitre detent points at 31.6° left and right
for cutting crown molding at the proper angle. There is also a mark on the
bevel scale at 33.8°.
The
Bevel Setting/Type of Cut
chart gives the proper settings for cutting
crown molding. (The numbers for the mitre and bevel settings are very
precise and are not easy to accurately set on your saw.) Since most
rooms do not have angles of precisely 90°, you will have to fine tune your
settings anyway.
PRETESTING WITH SCRAP MATERIAL IS EXTREMELY IMPORTANT!
Instructions for Cutting Crown Molding Laying Flat and
Using the Compound Features
1. Lay the molding with broad back surface down flat on saw table (Fig. T).
2. The settings below are for all Standard (U.S.) crown molding with 52°
and 38° angles.
BEVEL SETTING
TYPE OF CUT
33.8°
LEFT SIDE, INSIDE CORNER:
Top of molding against fence
Mitre table set right 31.62°
Save left end of cut
33.8°
RIGHT SIDE, INSIDE CORNER:
Bottom of molding against fence
Mitre table set left 31.62°
Save left end of cut
33.8°
LEFT SIDE, OUTSIDE CORNER:
Bottom of molding against fence
Mitre table set left 31.62°
Save right end of cut
33.8°
RIGHT SIDE, OUTSIDE CORNER:
Top of molding against fence
Mitre table set right 31.62°
Save right end of cut
nOTE:
When setting bevel and mitre angles for all compound mitres,
remember that the angles presented for crown moldings are very precise
and difficult to set exactly. Since they can easily shift slightly and very few
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Страница 6: ...4 Fig J Fig L1 Fig K Fig L2 Fig M Fig N Fig O Fig P 9 9 9 8 7 5 12 42 41 39 40 45º 48º 12 38 21 25 ...
Страница 7: ...5 Fig Q Fig R angle A A B Fig S Fig T Fig U Fig V 11 43 11 43 Fig W Fig X ...