Which term refers to the distance across the gear?

Which term refers to the distance across the gear?

• A. Teeth
• B. Pitch
• C. Diameter
• D. Axle or Shaft

Answer: (C)

The distance across a gear is its diameter—the straight-line span from one outer edge to the opposite outer edge that passes through the center. In gears this term can refer to the overall outside diameter, which is the full width across the gear, or to the pitch diameter in contexts about how teeth mesh. The other terms relate to different concepts: teeth are the individual gear teeth themselves, pitch describes the spacing of teeth (and the pitch circle where engagement happens), and the axle or shaft is the rotating component the gear mounts on. So when you’re talking about how wide the gear is across, diameter is the correct term.

The distance across a gear is its diameter—the straight-line span from one outer edge to the opposite outer edge that passes through the center. In gears this term can refer to the overall outside diameter, which is the full width across the gear, or to the pitch diameter in contexts about how teeth mesh. The other terms relate to different concepts: teeth are the individual gear teeth themselves, pitch describes the spacing of teeth (and the pitch circle where engagement happens), and the axle or shaft is the rotating component the gear mounts on. So when you’re talking about how wide the gear is across, diameter is the correct term.