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10 most extreme places on Earth. Pitch diameter is a term used to take measurements of the diameter of a gear or a screw using pitch points. Pitch points on a gear could be found if a straight line were drawn up from two of the gear's teeth located side by side and the two lines were connected by a curve.
CIRCULAR PITCH (p) is the distance along the pitch circle or. pitch line between corresponding profiles of adjacent teeth. CIRCULAR THICKNESS (t) is the length of arc between the. two sides of a gear tooth on the pitch circle, unless otherwise. specified. CLEARANCE-OPERATING (c) is the amount by which the. dedendum in a given gear exceeds the addendum of its mat-. ing gear.