Circular Thickness

Circular thickness, abbreviated as CT, is the thickness of a tooth measure along the circumference of the pitch circle.

 

Circular Thickness formula
\(\large{ CT = \frac{\pi\;PD}{2\;n} }\)
Symbol	English	Metric
\(\large{ CT }\) = circular thickness	\(\large{in}\)	\(\large{mm}\)
\(\large{ n }\) = number of teeth on the diameter	\(\large{dimensionless}\)
\(\large{ PD }\) = pitch diameter	\(\large{in}\)	\(\large{mm}\)
\(\large{ \pi }\) = Pi	\(\large{3.141 592 653 ...}\)

 

Circular Thickness formula
\(\large{ CT = \frac{1.57}{DP} }\)
Symbol	English	Metric
\(\large{ CT }\) = circular thickness	\(\large{in}\)	\(\large{mm}\)
\(\large{ DP }\) = dimetrical pitch	\(\large{in}\)	\(\large{mm}\)