Question

Tooth interference in an external involute spur gear pair can be reduced by

• A. decreasing center distance between gear pair
• B. decreasing module
• C. decreasing pressure angle
• D. increasing number of gear teeth

Answer 1

The correct option is D increasing number of gear teeth

Methods to prevent interference in gears are :

1. Stubbing the teeth decreases the path of contact and contact ratio, thereby decreasing interference.
2. Undercutting of gear eliminates interference however gear becomes weaker.
3. Increasing pressure angle decreases interference.
4. Increasing the number of teeth decreases interference.
5. Addendum of gear can be modified.
6. Circular pitch can be increased.
7. Decreasing the addendum of gear and by increasing the same for pinion.