The angle between two holes on the curved face of a cylinder

Calculate the angle between two holes on the curved face of a cylinder. For this equation to work, the center of the holes must be co-planar and perpendicular to the curved face. The value x is the shortest distance between two holes, which can be measured with a caliper using the external jaws.

• Find Angle (θ)

• Find x

Diameter of the Cylinder (D):

Hole 1 Diameter (H1_d):

Hole 2 Diameter (H2_d):

Hole Chamfer* (Ch × 45°):

Measured Distance (x):

Angle

Radian:

Degree:

Diameter of the Cylinder (D):

Hole 1 Diameter (H1_d):

Hole 2 Diameter (H2_d):

Hole Chamfer* (Ch × 45°):

Given Angle in Degrees (θ):

The value of x

x:

–

*If chamfers are around the holes, this equation will fail on angles above 90°. You can measure up to 180° with no chamfers as long as the cylinder fits inside the caliper jaws.