Circular Pitch

on . Posted in Gear

Circular pitch, abbreviated as CP, is the measured distance along the circumference of the pitch diameter from the point of one tooth to the corresponding point on an adjacent tooth.

Circular Pitch formula

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

Circular Pitch formula

$$\large{ CP = \frac{\pi}{DP} }$$
Symbol English Metric
$$\large{ CP }$$ = circular pitch $$\large{in}$$ $$\large{mm}$$
$$\large{ DP }$$ = dimetrical pitch $$\large{in}$$ $$\large{mm}$$
$$\large{ \pi }$$ = Pi $$\large{3.141 592 653 ...}$$

Tags: Gear Equations