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 addendum circle diameter of the pinion.
(a) 59.2mm
(b) 72.7mm
(c) 65.4mm
(d) None of the listed
I received this question in an internship interview.
This practical question is from the Helical Gears in section Rolling Contact Bearings, Spur Gears and Helical Gears of Machine Design