These are true involute gears that are guaranteed to mesh accurately with minimal vibration. There are 9 external gears with 16, 24, 32, 40, 48, 56, 64, 72, and 80 teeth; and 3 internal gears with 64, 80, and 96 teeth. All gears will mesh with each other. The gears were modeled on a grid and can be easily animated.

I have included both the original NURBS geometry for the gears and the converted polygonal geometry.

You may download the very high resolution renders of the gears to see for yourself that the gears mesh perfectly.