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Mechanical Engineering QUESTION #2472
Question 1
The center distance \(c\) between two external meshing spur gears with pitch diameters \(d_p\) and \(d_g\) is:
  • \(c = d_p - d_g\)
  • \(c = \frac{d_p + d_g}{2}\)✔️
  • \(c = \frac{d_p \cdot d_g}{2}\)
  • \(c = d_p + d_g\)
Correct Answer Explanation
For external spur gears, the center distance equals the sum of the pitch circle radii: \(c = r_p + r_g = (d_p+d_g)/2\).