The GATE Grind

GATE 2019 ME (ME2) – Question 17

Theory of Machines · Gears and gear trains · 1 mark · Multiple choice

A spur gear has pitch-circle diameter D and T teeth. Find its circular pitch.

  1. $\pi D/T$
  2. $T/D$
  3. $D/T$
  4. $2\pi D/T$

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Show answer and explanation

Correct answer: (A) $\pi D/T$

Explanation

Circular pitch is pitch-circle circumference divided by tooth count: $p_c=\pi D/T$. **A**. The quantity D/T is the module.