Creating a pair of geometrically correct mating gears is not exactly a trivial task. The sides of gear teeth are not curved arbitrarily. Most real-life gears use a mathematical curve, called “involute curve” to keep the pressure vector between the teeth constant. This tutorial will teach you how to crate a pair of perfectly meshing gears using Blender in just a few minutes. It will also teach you how to animate the gears using drivers.