The Lewis form factor of gear tooth depends on

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BPSC Asstt. Prof. ME Held on Nov 2015 (Advt. 22/2014)
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  1. the elastic modulus of the tooth
  2. the module
  3. the number of teeth
  4. the pitch circle diameter

Answer (Detailed Solution Below)

Option 3 : the number of teeth

Detailed Solution

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Explanation:

Lewis form factor for 20° full depth involute system is given by:

where T = number of teeth.

Hence the Lewis form factor (y) is only depends upon the number of teeth.

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