Pitch Diameter
Pitch diameter, abbreviated as PD, is the diameter of a gear pitch circle. The pitch diameter is used to generate the pitch circle.
Pitch Diameter formula |
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\(\large{ PD = \frac{n}{DP} }\) | ||
Symbol | English | Metric |
\(\large{ PD }\) = pitch diameter (diameter of pitch circle) | \(\large{in}\) | \(\large{mm}\) |
\(\large{ DP }\) = dimetrical pitch | \(\large{in}\) | \(\large{mm}\) |
\(\large{ n }\) = number of teeth on the diameter | \(\large{dimensionless}\) |
Pitch Diameter formula |
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\(\large{ PD = \frac{n \; CP }{\pi} }\) | ||
Symbol | English | Metric |
\(\large{ PD }\) = pitch diameter (diameter of pitch circle) | \(\large{in}\) | \(\large{mm}\) |
\(\large{ CP }\) = circular pitch | \(\large{in}\) | \(\large{mm}\) |
\(\large{ n }\) = number of teeth on the diameter | \(\large{dimensionless}\) | |
\(\large{ \pi }\) = Pi | \(\large{3.141 592 653 ...}\) |
Tags: Gear Equations