This animation was my first flash animation. It took me a while to understand flash concept and this animation made me to love Flash. It was also that time when I was developing my Gear Draw program which is publicly accessible now. You may find two rotating gear not interesting, but this is the first accurate flash gear animation ever, so I am very proud of it.
Definition of Involute Gear:
A gear tooth which has a profile determined by an involute curve drawn outward from a base circle.