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Which of the following gear ratio does not result in hunting tool

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+1 vote
in Machine Kinematics by (38.0k points)
Which of the following gear ratio does not result in hunting tool

(a) 77/20

(b) 76/21

(c) 75/22

(d) 71/25

The question was posed to me in examination.

This is a very interesting question from Standard Proportions of Gear Systems topic in chapter Toothed Gearing & Gear Trains of Machine Kinematics

1 Answer

0 votes
by (106k points)
Right option is (d) 71/25

To explain I would say: When several pairs of gears operating at the same centre distance are required to have hunting ratios, this can be accomplished by having the sum of the teeth in each pair equal to a prime number.

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