Question

What is the standard value of clearance? (Where, m is module)

(a) 0.572 x m

(b) 0.182 x m

(c) 0.157 x m

(d) 0.821 x m

The question was posed to me during an interview.

My question is taken from Terminology of Gear Tooth topic in division Measurement and Testing of Gears of Engineering Metrology

Answer 1

Correct choice is (c) 0.157 x m

The best I can explain: Term clearance used in terminology of gear tooth is the radial distance from the tooth top to the bottom of a mating tooth space when the teeth are engaged symmetrically. Standard value of clearance is 0.157 m where m is module.