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pitch surface
noun
- (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.
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Word History and Origins
Origin of pitch surface1
First recorded in 1885–90
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Example Sentences
We may also say that the pitch circle is the edge of the pitch surface.
From Project Gutenberg
The pitch-surface of a wheel lies intermediate between the points of the teeth and the bottoms of the hollows between them.
From Project Gutenberg
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