86459 - Powertrain Design and Manufacturing

Course Unit Page


This teaching activity contributes to the achievement of the Sustainable Development Goals of the UN 2030 Agenda.

Quality education Industry, innovation and infrastructure

Academic Year 2021/2022

Learning outcomes

The aims of the course are to provide the knowledge, the methods and the tools useful for the correct design and verification of the mechanical powertrain components, such as, the gear transmissions, the belt transmissions, the power connection elements and their materials. At the end of the course the students will be able, for example, to select the most appropriate type of mechanical connections or transmission system

Course contents

Introduction to the powertrain components. 

Driving belts: flat belts, trapezoidal belts and timing belts.

The rotating disk theory.

The shaft hub couplings: press-fit shrink-fit, taper-fit, tongue-fit and spline hole/shaft.

Gears transmissions and their design.


Robert C. Juvinall - Kurt M. Marshek “Machine Component Design”, 5th Edition Wiley

Shigley's Mechanical Engineering Design (McGraw-Hill Series in Mechanical Engineering)

Pahl G., Beitz W., Feldhusen J., Grote K.-H., [http://www.springer.com/it/book/9781846283185] - A Systematic Approach, 2007, Springer, ISBN 978-1-4471-6025-0

Ullman G.D.

“The Mechanical Design Process”

Mc Graw-Hill, 1992.

Teaching methods

The course includes theoretical and practical lectures given with the aid of multimedia systems. The didactic material is uploaded at the platform “Virtuale" (https://virtuale.unibo.it)

Assessment methods

The assessment of learning is performed through a written test and an oral test, both in presence.

The written test lasts three hours and consists of the solution of three numerical exercises, on the following topics.

  1. Calculation of a shaft-hub coupling.
  2. Selection and verification of gear transmission.
  3. Selection and verification of a belt transmission.

During the written test, any kind of books and tables can be consulted. You can use spreadsheets present on personal computers as long as you start from blank sheets. All the formulas, the steps for obtaining the results and the individual numerical results must, however, be reported in the examination files.

Each exercise is assigned the maximum score of 10 points out of 30.

The test is passed if the overall grade (given by the sum of the partial scores) is of at least 18/30.

The oral exam aims to verify the learning of the theoretical topics covered in class and must be carried out within the three sessions scheduled for the exam session in which the written exam was taken (summer or autumn period). Taking the first available oral exam is recommended in order to be able, if necessary, to repeat the written exam.

Teaching tools

The student acquires basic and advanced knowledge on the design and sizing of machine parts and their components dedicated to powertrain transmission

Links to further information


Office hours

See the website of Dario Croccolo

See the website of Francesco Robusto