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pitch plane

noun, Machinery
See under pitch surface.

pitch surface

(in a gear or rack) an imaginary surface forming a plane (pitch plane) a cylinder (pitch cylinder) or a cone or frustrum (pitch cone) that moves tangentially to a similar surface in a meshing gear so that both surfaces travel at the same speed.
Origin of pitch surface
1885-90 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for pitch plane
  • In developing a computer simulation, a pitch plane model of the crane was developed.
  • All vehicle modeling reported herein used only three degrees of freedom without any attempt to verify trim in the pitch plane.

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