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When two spur gears having involute profiles on...

When two spur gears having involute profiles on their teeth engage, the line of action is tangential to the

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asked Sep 25, 2022 in Machine Kinematics by Leo (38.0k points)

When two spur gears having involute profiles on their teeth engage, the line of action is tangential to the

(a) pitch circles

(b) dedendum circles

(c) addendum circles

(d) base circles

The question was posed to me in a national level competition.

This intriguing question comes from Law of Gearing in division Toothed Gearing & Gear Trains of Machine Kinematics

machine kinematics
toothed gearing & gear trains
law of gearing

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answered Oct 19, 2022 by Greg (106k points)

Right choice is (a) pitch circles

Easiest explanation: None.

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