+1 vote
in Machine Kinematics by (38.0k points)
A speed reducer unit consists of a double-threaded worm of pitch = 11 mm and a worm wheel of pitch diameter = 84 mm. The ratio of the output torque to the input to rque is

(a) 7·6

(b) 12

(c) 24

(d) 42

The question was posed to me in a dream while sleeping

My question comes from Contact Ratio topic in division Toothed Gearing & Gear Trains of Machine Kinematics

1 Answer

0 votes
by (45.7k points)
Right choice is (a) 7·6

To explain: Output torque/Input torque = pitch diameter of worm wheel/ pitch of worm

                                        = 84/11

                                        = 7.6.

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