Question:
In spur gears, the module is defined as ratio of:
In spur gears, the module is defined as ratio of:
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Module (m) = D T.
D = pitch circle diameter, T = number of teeth.
D = pitch circle diameter, T = number of teeth.
Updated On: Aug 18, 2026
- Number of teeth to pitch circle diameter
- Circular pitch to number of teeth
- Pitch circle diameter to circular pitch
- Pitch circle diameter to number of teeth
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The Correct Option is D
Solution and Explanation
Step 1: Understanding the Concept:
Module is a key parameter in gear design.
It relates gear dimensions to the number of teeth.
Step 2: Key Formula or Approach:
Module (m) = Pitch circle diameter Number of teeth.
Step 3: Detailed Explanation:
The module is defined as the ratio of the pitch circle diameter to the number of teeth.
It is a measure of gear tooth size.
Other options are incorrect.
Thus, the correct definition is pitch circle diameter to number of teeth.
Step 4: Final Answer:
Module = Pitch circle diameter Number of teeth.
Hence, the correct option is (D).
Module is a key parameter in gear design.
It relates gear dimensions to the number of teeth.
Step 2: Key Formula or Approach:
Module (m) = Pitch circle diameter Number of teeth.
Step 3: Detailed Explanation:
The module is defined as the ratio of the pitch circle diameter to the number of teeth.
It is a measure of gear tooth size.
Other options are incorrect.
Thus, the correct definition is pitch circle diameter to number of teeth.
Step 4: Final Answer:
Module = Pitch circle diameter Number of teeth.
Hence, the correct option is (D).
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