The outside diameter of a spur gear having a pitch diameter of 1.500 and 48 teeth is 1.68.

Question

Quizplus · Accepted Answer

The outside diameter of a spur gear is calculated by adding 2 times the module to the pitch diameter. The module is equal to the pitch diameter divided by the number of teeth. For a gear with a pitch diameter of 1.500 inches and 48 teeth, the module is 1.500 / 48 = 0.03125. Therefore, the outside diameter would be 1.500 + 2*(0.03125) = 1.5625 inches, not 1.68 inches.

The Outside Diameter of a Spur Gear Having a Pitch