Diametral Pitch
Diametral pitch, abbreviated as DP, is the ratio of the number of teeth to the pitch circle diameter.
Diametral Pitch formula |
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\(\large{ DP = \frac{n}{PD} }\) | ||
Symbol | English | Metric |
\(\large{ DP }\) = dimetrical pitch | \(\large{dimensionless}\) | |
\(\large{ PD }\) = pitch diameter | \(\large{in}\) | \(\large{mm}\) |
\(\large{ n }\) = number of teeth | \(\large{dimensionless}\) |
Diametral Pitch formula |
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\(\large{ DP = \frac{\pi}{CP} }\) | ||
Symbol | English | Metric |
\(\large{ DP }\) = dimetrical pitch | \(\large{dimensionless}\) | |
\(\large{ CP }\) = circular pitch | \(\large{in}\) | \(\large{mm}\) |
\(\large{ \pi }\) = Pi | \(\large{3.141 592 653 ...}\) |
Diametral Pitch formula |
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\(\large{ DP = \frac{n_p \; \left( GR \;+\;1 \right) }{2 \; CD} }\) | ||
Symbol | English | Metric |
\(\large{ DP }\) = dimetrical pitch | \(\large{dimensionless}\) | |
\(\large{ CD }\) = center distance | \(\large{in}\) | \(\large{mm}\) |
\(\large{ GR }\) = gear ratio | \(\large{dimensionless}\) | |
\(\large{ n_p }\) = number of teeth on the pinion | \(\large{dimensionless}\) |
Tags: Gear Equations