pitch circle

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pitch circle

n
(Mechanical Engineering) an imaginary circle passing through the teeth of a gearwheel, concentric with the gearwheel, and having a radius that would enable it to be in contact with a similar circle around a mating gearwheel
References in periodicals archive ?
Since there is no sliding of the planet gear on the fixed gear, that point c at which their pitch circles are in contact may be considered as having momentarily a linear velocity of zero.
If the follower is a gear, point p is taken to be the point of tangency between the pitch circles of the planet gear and the follower.
D3, D4, etc = diameters of pitch circles of planetary gears;