WordReference Random House Unabridged Dictionary of American English © 2025
pitch′ sur′face,
- Mechanical Engineering(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.
- 1885–90
'pitch surface' also found in these entries (note: many are not synonyms or translations):