Tutorial to make bevel gear in Catia V5
Sketch an involute gear on xy plane
Sketch an inclined line on a plane perpendicular to xy plane
Sketch a vertical line may be in the same plane but in a different sketch
Revolute the line drawn earlier using the vertical line as axis.
Project the profile made in first step on the revolute surface.
Create a plane parallel to the xy plane
Invoke a sketch on the newly created plane
Make a sketch on a perpendicular plane
Create another revolute surface
Project the sketch made on plane1 on to the revolute surface.
Use multisection surface
Split out the unnecessary parts.