A pair of parallel helical gears consist of 15 teeth pinion meshing with a 40 teeth gear. The helix angle is 22⁰ and normal pressure angle 19⁰. The normal module is taken as 4mm. Calculate the pitch circle diameter of pinion.
(a) 64.7mm
(b) 52.6mm
(c) 56.6mm
(d) 68.8mm
I was asked this question while doing exercises.
This question was presented in the Helical Gears unit in part Rolling Contact Bearings, Spur Gears and Helical Gears of Machine Design