Question

In helical gears, the distance between similar faces of adjacent teeth along a helix on the pitch cylinders normal to the teeth, is called

(a) normal pitch

(b) axial pitch

(c) diametral pitch

(d) module

The question was posed to me during an interview.

I want to ask this question from Standard Proportions of Gear Systems topic in portion Toothed Gearing & Gear Trains of Machine Kinematics

Answer 1

The correct choice is (a) normal pitch

For explanation I would say: Normal pitch is the distance between similar faces of adjacent teeth along a helix on the pitch cylinders normal to the teeth.

             Axial pitch is the distance, parallel to the axis, between similar faces of adjacent teeth.