Pitch circle

Pitch circle

In mechanical engineering, a pitch circle (operating) is the curve of intersection of a pitch surface of revolution and a plane of rotation. It is the imaginary circle that rolls without slipping with a pitch circle of a mating gear.1

Notes

1. "ANSI/AGMA 1012-G05", "Gear Nomenclature, Definition of Terms with Symbols".


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  • Pitch circle — Pitch Pitch, n. 1. A throw; a toss; a cast, as of something from the hand; as, a good pitch in quoits. [1913 Webster] {Pitch and toss}, a game played by tossing up a coin, and calling Heads or tails; hence: {To play pitch and toss with… …   The Collaborative International Dictionary of English

  • Pitch circle — Circle Cir cle (s[ e]r k l), n. [OE. cercle, F. cercle, fr. L. circulus (Whence also AS. circul), dim. of circus circle, akin to Gr. kri kos, ki rkos, circle, ring. Cf. {Circus}, {Circum }.] [1913 Webster] 1. A plane figure, bounded by a single… …   The Collaborative International Dictionary of English

  • pitch circle — n. an imaginary circle that intersects the teeth of a gear at the actual points where the teeth mesh with another gear: the pitch circles of two enmeshed gears are tangent …   English World dictionary

  • pitch circle diameter — (PCD) The diameter of the stud holes/bolt holes for fixing the wheel to the hub. The pitch circle (PC) is usually shown as a double number, e.g., 5 5.5. The first number indicates the number of holes, and the second, the diameter of the PC …   Dictionary of automotive terms

  • pitch circle — Mach. an imaginary circle within the profiles of the teeth of a gear, such that it rotates against a similar circle rotating at the same rate on a meshing gear. Also called pitch line. [1810 20] * * * …   Universalium

  • pitch circle — noun Etymology: pitch (IV) : a pitch line in a circular gear that forms a circle concentric with the axis of the gear …   Useful english dictionary

  • pitch circle — noun Mechanics an imaginary circle concentric to a toothed wheel, along which the pitch of the teeth is measured …   English new terms dictionary

  • pitch circle — /ˈpɪtʃ sɜkəl/ (say pich serkuhl) noun an imaginary circle concentric with the axis of a toothed wheel, at such a distance from the base of the teeth that it is in contact with and rolls upon a similar circle of another toothed wheel engaging with …  

  • pitch circle — (PC) the circumference on which the centers of the wheel bolt holes are located …   Dictionary of automotive terms

  • Pitch — Pitch, n. 1. A throw; a toss; a cast, as of something from the hand; as, a good pitch in quoits. [1913 Webster] {Pitch and toss}, a game played by tossing up a coin, and calling Heads or tails; hence: {To play pitch and toss with (anything)}, to… …   The Collaborative International Dictionary of English

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