PitchDiameter
Pitch diameter is the diameter of the pitch circle, an imaginary cylinder on which gear teeth are designed to mesh or, in threading, the cylinder on which mating threads engage. It is a key reference dimension that determines how parts fit and interact.
In gears, the pitch diameter is central to geometry and mating compatibility. If N is the number
In screw threads, the pitch diameter (often called the mean diameter) is the Effective diameter where the
Overall, the pitch diameter serves as the reference dimension for determining mating geometry, center distances, and