The ratio of face width to transverse pitch of a helical gear with α as the helix angle is normally
(a) more than 1.15/tan α
(b) more than 1.05/tan α
(c) more than 1/tan α
(d) none of the mentioned
This question was addressed to me in exam.
This is a very interesting question from Toothed Gearing in portion Toothed Gearing & Gear Trains of Machine Kinematics