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Chapter 12: Problem 60
A pinion having 20 teeth and a diametral pitch of 8 (in-1) is in mesh with a rack. If the pinion rotates one revolution, how far will the rack move?
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Design a two-stage compound spur gear train for an overall ratio of approximately 53:1. Specify tooth numbers for each gear in the train.
A gearset with full-depth teeth is designed to have a pinion with 24 teeth, a gear with 54 teeth, and a diametral pitch of 6. Compare the contact ratio for this set for pressure angles of \(14.5,20\), and \(25^{\circ}\).
A \(20^{\circ}\)-pressure-angle, 27-tooth spur gear has a diametral pitch \(p_{d}=5\). Find the pitch dia. addendum, dedendum, outside dia, and circular pitch.
A 39-tooth spur gear is in mesh with an 18-tooth pinion. The \(p_{d}=8\) and \(\phi=25^{\circ}\). Find the contact ratio.
The pinion of an external gearset has pitch radius \(r_{p}=40 \mathrm{~mm}\) and the gear has pitch radius \(r_{g}=160 \mathrm{~mm}\). If the pinion is the input member of the set, determine the velocity ratio, the torque ratio, and the gear ratio of the set.
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