Base Circle

on . Posted in Gear

gear diameter 2Base circle, abbreviated as BC, is a circle from where involute portion of tooth profile will be produced.


Base Circle formula

\(\large{ BC = PD \; cos\; PA }\) 
Symbol English Metric
\(\large{ BC }\) = base circle \(\large{in}\) \(\large{mm}\)
\(\large{ PD }\) = pitch diameter \(\large{in}\) \(\large{mm}\)
\(\large{ PA }\) = pressure angle \(\large{deg}\) \(\large{rad}\)


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Tags: Gear Equations