Rotaion animation question

I am trying to animate 3 gears rotating. The problem is they are at an angle. When I rotate a gear on z local axis it spins how I want it to. However I cant figure out which keyframe to use because they all seem to make it spin out of control.

I suppose you mean “which type of keyframe”… and that should simply be Rotation on the 3 axes.

Of course, I’m only guessing. Without a little image or a simplified version of your blend file to see, all that anybody can do is to shoot darts in the dark… :no: