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The calculation of the force transmitted in a gear train is important when it is geometrically related to the number of teeth of the gears or the diameter of action. The speed ratio that is established between the two elements, is related to the speed, the torque developed, and even the acceleration. When a mechanical element is modeled parametrically, it is of greater advantage, because with a change of one mathematical parameter, the model has been adjusted in the equation and parameters table, with this single design the designer has the ability to create a toolbox useful for their own design purposes. This paper shows the performance of a parametric design of a spur gear with SolidWorks CAD tool. With the support of this design, it shows the construction of a simple gear train, the calculation of the speed ratio, as well as its impact on the calculation of the power and torque and how the gear is involved.

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In mechanical project development, there are two kind of knowledge, theoretical, taught according on syllabus at universities, and in the other hand, practical, usually learned in the working environment. For graduated recently engineers, it means a disadvantage once they are trying to get a job. Seeking to achieve better results on student performance from a real design plane, learning strategy is presented to enhance both knowledges applying them to an educational project completed, learning topics that normally is not covered on syllabus and generating all information required about design and manufacturing project. This paper shows a case of study about a telescopic crane design, analyzing all information generated from conceptual to detail engineering. Finally, preliminary results about all information generated through the different project stages is presented, helping in this way the decision-making process of the students and the information management when developing project from the beginning to the end.