How to make a gear component(involute profile) including pressure angle.

how we should draw a profile sketch with relation in the parameters, which options are useful. provide me a tutorial

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In Catia you can only define an involute by using a mathematical expression.
Otherway you have to copy the involute from other 2D files like DXF, DWG etc.
In common way you use macros or external software to import the gear profile.

 
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