Question

The angle between the tooth trace and an element of the pitch cone, corresponding to helix angle in helical gears is

(a) shaft angle

(b) pitch angle

(c) spiral angle

(d) none of the mentioned

The question was asked in quiz.

I'm obligated to ask this question of Bevel Gears in portion Toothed Gearing & Gear Trains of Machine Kinematics

Answer 1

Correct option is (c) spiral angle

Easy explanation: The angle between the tooth trace and an element of the pitch cone, corresponding to helix angle in helical gears is spiral angle.

The angle formed between an element of the pitch cone and the bevel gear axis is pitch angle.