pitch circle
noun Machinery.
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.
Origin of pitch circle
First recorded in 1810–20
Words nearby pitch circle
pitch,
pitch accent,
pitch and putt,
pitch chain,
pitch chisel,
pitch circle,
pitch cone,
pitch cylinder,
pitch in,
pitch into,
pitch lake
Example sentences from the Web for pitch circle
The distance, measured along the pitch-circle, from the face of one tooth to the face of the next, is called the pitch.
Let BB be part of the pitch-circle, and a the point where a tooth is to cross it.
British Dictionary definitions for pitch circle
pitch circle
noun
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