A pitch circle (operating) is the curve of intersection of a pitch surface of revolution and a plane of rotation. It is the imaginary circle that rolls without slipping with a pitch circle of a mating gear. These are the outlines off the imaginary smooth roller or friction discs in every pair of mating gears. Many important measurements are taken on and from this circle.
Read more about this topic: List Of Gear Nomenclature
Famous quotes containing the words pitch and/or circle:
“People do not know the natural infirmity of their mind: it does nothing but ferret and quest, and keeps incessantly whirling around, building up and becoming entangled in its own work, like our silkworms, and is suffocated in it: a mouse in a pitch barrel.”
—Michel de Montaigne (1533–1592)
“It was my heaven’s extremest sphere,
The pale which held that lovely deer;
My joy, my grief, my hope, my love,
Did all within this circle move!”
—Edmund Waller (1606–1687)