noun, Masonry. 1. a broad-edged chisel for cutting plane surfaces on stones.
noun, Machinery. 1. an imaginary circle within the profiles of the teeth of a gear, such that it rotates against a similar circle rotating at the same rate on a meshing gear. noun 1. an imaginary circle passing through the teeth of a gearwheel, concentric with the gearwheel, and having a radius that would enable […]
noun, Machinery. 1. See under . 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.
- Pitch-cone angle
noun 1. (in a bevel gear) the apex angle of the truncated cone (pitch cone) which forms the reference surface on which the teeth of a bevel gear are cut