Answer to Question #308801 in Mechanical Engineering for EngineeringHelp

Question

Two equal 5-module, 20 degree gears mesh

together such that the addendum circle of each

gear passes through the interference point of the

other. If the contact ratio is 1.622, calculate the

number of teeth and the outside radius on each

gear.

Answer 1

A toothed gear must have an integral number of teeth. The circular pitch, therefore, equals the pitch circumference divided by the number of teeth. The diametral pitch is, by definition, the number of teeth divided by the pitch diameter.