Crown gear

A crown gear (also known as a face gear or a contrate gear) is a gear which has teeth that project at right angles to the face of the wheel.

In particular, a crown gear is a type of bevel gear where the pitch cone angle is 90 degrees.

[1][2] A pitch cone of any other angle is simply called a bevel gear.

[3] Crown gears normally mesh with other bevel gears, or sometimes spur gears, a typical use being a crown gear and pinion system which allows a rotary motion to be shifted 90 degrees.

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