Question

During the design of a gear, if the higher-pressure angle is chosen, then the gear has:

• A. Weaker teeth
• B. Bigger size teeth
• C. Wider base and stronger teeth
• D. Narrow base and weaker teeth

Hint:

In gear design, a higher pressure angle typically results in stronger teeth with a wider base, as it helps handle higher forces transmitted between the gears.

Answer 1

The Correct Option is C

Step 1: Pressure Angle and Tooth Design
The pressure angle in gears is the angle between the line of action and the line perpendicular to the tooth surface. A higher pressure angle increases the strength of the teeth by allowing a larger contact area between the teeth, which helps distribute the forces more effectively.
Step 2: Impact of Higher Pressure Angle
With a higher pressure angle, the forces between the meshing gear teeth are applied at a steeper angle, which increases the contact stresses. To counteract these higher stresses, the base of the teeth needs to be made wider. This helps to prevent tooth breakage and strengthens the teeth.
Step 3: Conclusion
A higher pressure angle results in wider bases and stronger teeth, making option (3) the correct answer.