If the centre distance of a mating gear having involute teeth is varied within limits, the velocity ratio

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WBPSC JE Mechanical 2018 Official Paper
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  1. increases
  2. decreases
  3. remain unchanged
  4. None of the above

Answer (Detailed Solution Below)

Option 3 : remain unchanged
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Detailed Solution

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Explanation:

For an involute profile gears:

  • During the action the pressure angle remains constant.
  • No fluctuating load on support as well as no fluctuating torque output.
  • With the change in the center distance, the law of gearing is still satisfied, however, the operation becomes noisy.
  • The center distance for a pair of mating gears can be varied within limits without altering the velocity ratio.
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