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Stesso

Calculate Bevel Angle for 38-Degree Crown

0:33
1:17
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At 0:33 in

Angles for cutting crown flat

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What happens here

Following the miter angle, the presenter demonstrates the calculation for the bevel angle using the formula: `asin(sin(complementary angle) × sin(half angle))`. Again, for a 38-degree spring angle crown, the complementary angle is 52 degrees, and for a 90-degree corner, the half angle is 45 degrees. Inputting these into the calculator: `asin(sin(52) × sin(45))` yields approximately 33.86 degrees, which is then rounded up to 33.9 degrees. This is the bevel setting for the miter saw.

Goal: Determine the correct bevel saw setting for a 38-degree spring angle crown molding

Tools and materials

  • Miter Saw Ridgid — To set the calculated bevel angle

What they say

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phone. Arc tangent cosine 52 / tangent 45, and that gives you your 31.6 miter. And for the bevel, arc sign sign 52 * sign 45, and you get 33.8, rounded up to 33.9. But, what if you're not using 38° crown? Let's cut and calculate for 45°. Spring angle is 45°. Using our equation,

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