Page 1
A Perfect Crown Molding
with your Starrett CP505A-12
1) Measure the corner angle near the ceiling. Note
the Miter Cut value from the dial (inner scale).
2) Measure the spring angle of your stock (see below
right) with the protractor on your CP505A-12.
3) Refer to the compound cut conversion table on your tool
(or the back of this page). Locate the row with the same
"Miter Cut" value as your corner measurement.
4) Note the "Miter Angle" and "Bevel Angle" from the row that
corresponds to the 38° or 45° spring angle, as determined in step 2.
5) Refer to the table below and set the miter angle and
bevel angle on your compound miter saw, position
your work piece with reference to the blade and fence,
as indicated. Then, cut your first work piece.
6) Reset the saw and position your second work piece as
indicated below. Then, cut your second work piece.
The two work pieces should align perfectly for your crown molding.
Settings and Layout to Cut Crown Molding with a Compound Miter Saw
Inside Corner
Left Piece Right Piece
Miter Swing: Right Miter Swing: Left
Bevel Swing: Left Bevel Swing: Left
Work Piece Location: Left of Blade Work Piece Location: Left of Blade
Molding Edge
Against Fence: Top Molding Edge Against Fence: Bottom
Outside Corner
Left Piece Right Piece
Miter Swing: Left Miter Swing: Right
Bevel Swing: Right Bevel Swing: Right
Work Piece Location: Right of Blade Work Piece Location: Right of Blade
Molding Edge Against Fence: Bottom Molding Edge Against Fence: To p
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Page 2
38° Crown 45° Crown
Compound Cut Conversion Table
Miter
Miter
Bevil
Cut
Angle
1 0.6 0.8 0.7 0.7
2 1.2 1.6 1.4 1.4
3 1.9 2.4 2.1 2.1
4 2.5 3.2 2.8 2.8
5 3.1 3.9 3.5 3.5
6 3.7 4.7 4.3 4.2
7 4.3 5.5 5.0 4.9
8 5.0 6.3 5.7 5.7
9 5.6 7.1 6.4 6.4
10 6.2 7.9 7.1 7.1
11 6.8 8.7 7.8 7.8
12 7.5 9.4 8.6 8.5
13 8.1 10.2 9.3 9.2
14 8.7 11.0 10.0 9.9
15 9.4 11.8 10.7 10.6
16 10.0 12.5 11.5 11.2
17 10.7 13.3 12.2 11.9
18 11.3 14.1 12.9 12.6
19 12.0 14.9 13.7 13.3
20 12.6 15.6 14.4 14.0
21 13.3 16.4 15.2 14.7
22 14.0 17.2 15.9 15.4
23 14.7 17.9 16.7 16.0
24 15.3 18.7 17.5 16.7
25 16.0 19.5 18.3 17.4
26 16.7 20.2 19.0 18.1
27 17.4 21.0 19.8 18.7
28 18.1 21.7 20.6 19.4
29 18.8 22.5 21.4 20.1
30 19.6 23.2 22.2 20.7
Angle
Miter
Angle
Bevil
Angle
38° Crown 45° Crown
Miter
Miter
Bevil
Cut
Angle
Angle
Miter
Angle
31 20.3 23.9 23.0 21.4
32 21.0 24.7 23.8 22.0
33 21.8 25.4 24.7 22.7
34 22.6 26.2 25.5 23.3
35 23.3 26.9 26.3 23.9
36 24.1 27.6 27.2 24.6
37 24.9 28.3 28.1 25.2
38 25.7 29.0 28.9 25.8
39 26.5 29.7 29.8 26.4
40 27.3 30.4 30.7 27.0
41 28.2 31.1 31.6 27.6
42 29.0 31.8 32.5 28.2
43 29.9 32.5 33.4 28.8
44 30.7 33.2 34.3 29.4
45 31.8 33.9 35.3 30.0
46 32.5 34.5 36.2 30.6
47 33.4 35.2 37.2 31.1
48 34.4 35.9 38.1 31.7
49 35.3 36.5 39.1 32.3
50 36.3 37.1 40.1 32.8
51 37.2 37.8 41.1 33.3
52 38.2 38.4 42.2 33.9
53 39.3 39.0 43.2 34.4
54 40.3 39.6 44.2 34.9
55 41.3 40.2 45.3 35.4
56 42.4 40.8 46.4 35.9
57 43.5 41.4 47.4 36.4
58 44.6 41.9 48.5 36.8
59 45.7 42.5 49.6 37.3
60 46.8 43.0 50.8 37.8
Bevil
Angle
Form 969 08/11 Specifications subject to change.
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