+1 vote
in Machine Kinematics by (38.0k points)
A helical gear has the active face width equal to b pitch p and helix angle α. What should be the minimum value of b in order that contact is maintained across the entire active face of the gear?

(a) p cosα

(b) p secα

(c) p tanα

(d) p cotα

The question was posed to me by my school principal while I was bunking the class.

Origin of the question is Standard Spur Gears in division Toothed Gearing & Gear Trains of Machine Kinematics

1 Answer

0 votes
by (106k points)
Correct option is (d) p cotα

The explanation is: b > p/tanα

             b > p cotα.

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