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Mechanical Engineering QUESTION #2459
Question 1
Gear interference occurs when:
  • The pressure angle exceeds 25°
  • The addendum circle of one gear extends beyond the tangent points (interference points) on the line of action✔️
  • The contact ratio exceeds 2.0
  • The module is less than 1 mm
Correct Answer Explanation
Interference occurs when the dedendum of one gear extends below its base circle. The maximum addendum radius without interference is \(r_{a,max}=\sqrt{r_b^2+c^2\sin^2\phi}\).