Tutorial - Creating Herring bone gear in SolidWorks?
Here is the tutorial.
We will use the helical gear body created in previous tutorial of creating helical gear. Here is the tutorial http://grabcad.com/questions/tutorial-creating-helical-gear-in-solidworks
Select the mirror tool in features tab.
Select top plane as mirror plane and the gear body as body to mirror. Click OK.
We have the Herring bone gear.