The task of making drawings of gears using 3D models in Autodesk Inventor package is dealt with. The methods to improve the execution of working drawings of parametric 3D models of gears with application of a parametric shell are developed. The use of basic geometric parameters of gear wheels as the initial parameters provided a general view of the 3D model «parametric shell». Performance of gear assembly «gear in the parametric shell» facilitates the creation of drawings in accordance with the requirements of USDD.