Introduction To Industrial Maintenance Practice Test

Diametral pitch relates to which characteristic of gear teeth?

Tooth Size Lubricant Viscosity Shaft Diameter Bearing Clearance

Correct Answer:

Tooth Size

Explanation:

Diametral pitch describes how large or small the gear teeth are by counting how many teeth fit in one inch of the gear’s pitch diameter. In other words, it specifies tooth size and spacing at the pitch circle. Gears that mesh must share the same diametral pitch, or they won’t engage properly. The other options aren’t about tooth size: lubricant viscosity affects lubrication, shaft diameter concerns overall size, and bearing clearance deals with gaps and fits.

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