If you know the gear ratio of a pair of mating gears, you also know the diametrical pitch.

Question

Quizplus · Accepted Answer

The gear ratio is the ratio of the number of teeth on the driving gear to the number of teeth on the driven gear. The diametrical pitch, on the other hand, is the number of teeth per unit length of a gear's pitch diameter. Knowing the gear ratio alone does not provide enough information to determine the diametrical pitch.

If You Know the Gear Ratio of a Pair of Mating