"In the following pages are presented the detailing of the main parameters in some of the most commonly used gears (spur, helical, face-gears), the reason involute profiles are widely standardized for gear tooth profiles, the steps of constructing the involute profile of the tooth, as well as the different gear forming techniques used in the industry. The importance of standardized tooth systems is highlighted too. The generation by shaping of the tooth profile starting from the creator shape will then be tackled, by defining the coordinate transformation procedure coupled with an exemplary application. The types of gears that will be considered are spur gears, helical gears and face-gears.