pitch cylinder


noun Machinery.

See under pitch surface.

Definition for pitch cylinder (2 of 2)

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.

Origin of pitch surface

First recorded in 1885–90

British Dictionary definitions for pitch cylinder

pitch cylinder

noun

an imaginary cylinder passing through, and coaxial with, the threads of a screw so that its intersection with opposite flanks of any groove is equal to half the thread pitch