Question

Which of the following can be used to ensure smoothness of gear operation?

(a) By limiting the minimum permissible deviation in base circle

(b) By limiting the maximum permissible deviation in base circle

(c) By limiting the maximum permissible deviation in basic pitch

(d) By limiting the minimum permissible deviation in basic pitch

This question was addressed to me by my college director while I was bunking the class.

Asked question is from Sources of Errors in Manufacturing Gears in division Measurement and Testing of Gears of Engineering Metrology

Answer 1

Correct answer is (c) By limiting the maximum permissible deviation in basic pitch

Explanation: Smoothness of gear operation is important to provide for noiseless engagement and longer service life of gearing. The smoothness of gear operation can be ensured by limiting the maximum permissible deviations in basic pitch.