Number of Teeth

on . Posted in Gear

gear depth 1Number of teeth, abbreviated as \(n_t\), is the number of teeth contained in a gear.

 

Number of Teeth formula

\(\large{ n_t = DP \; PD  }\) 
Symbol English Metric
\(\large{ n_t }\) = number of teeth \(\large{dimensionless}\)
\(\large{ DP }\) = dimetrical pitch \(\large{in}\) \(\large{mm}\)
\(\large{ PD }\) = pitch diameter \(\large{in}\) \(\large{mm}\)

 

Number of Teeth formula

\(\large{ n_t = \frac{ \pi \; PD }{ CP }  }\) 
Symbol English Metric
\(\large{ n_t }\) = number of teeth \(\large{dimensionless}\)
\(\large{ CP }\) = circular pitch \(\large{in}\) \(\large{mm}\)
\(\large{ PD }\) = pitch diameter \(\large{in}\) \(\large{mm}\)
\(\large{ \pi }\) = Pi \(\large{3.141 592 653 ...}\)

 

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Tags: Gear Equations