pitch surface

noun

1. (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.

Word History and Origins

Origin of pitch surface¹

First recorded in 1885–90

Example Sentences

They confidently handled the artificial pitch surface and a temperature that dipped to around -10 with added wind chill, to be expected at a stadium from which the town’s illuminated ski slopes were visible just over the lake covered by its deep snowy blanket.

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And that’s before you’ve considered the variations in temperature, altitude and pitch surface.

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Pitch Circle.—A section of the pitch surface of a toothed wheel by a plane perpendicular to its axis is a circle, and is called a pitch circle.

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We may also say that the pitch circle is the edge of the pitch surface.

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This is done by dividing the pitch surface by V-shaped grooves, the sides of the grooves being radii of the circular surface, so that the central parts of the mirror get most of the polishing action.

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