Crown gear

A crown 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.

See also


  1. Maitra, Gitin (1994-06-01). Handbook of Gear Design (2 ed.). McGraw-Hill Professional. ISBN 978-0-07-460237-9.
  2. Jones, Franklin D (1984). Gear Design Simplified (3 ed.). p. 48. ISBN 978-0-8311-1159-5.
  3. Oberg, Erik (1920). Spur and bevel gearing (1 ed.). Industrial Press. p. 202.
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