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Mechanical power transmission


Part I - CAD

- best use of CAD software (organising the data; top-bottom modeling via skeletons)

- practice with 3DX


Part II - Gears

- planetary gears

- detailed geometry of involute gears

- gear sizing using ISO6336


Part III - Project work

Groups of 2 or 3 students

Using the following specifications:

. use context, geometrical constraints

. input and output data

. expected service life

Each team has to produce:

. a thorough sizing synthesis document (gears, bearings, shafts, clampings)

. a drawing of the mechanism

. a CAD model of the mechanism


At the end of this module, the student will be able to analyse technical requirements related to the design of a gear reducer, create a design with the associated sizing calculations, present their solution by means of both a draft and a CAD model.

Needed prerequisite

Fundamentals of mechanical design:

- basics of manufacturing (welding, machining)

- common clamping technology (key, splines, screws, etc.)

- pivot joints (rolling bearings joint design and sizing)

- basics of technical drawing

- calculating forces in a mechanical system (equilibrium laws)

- calculating stresses (torsion and bending of beams)

Form of assessment

The evaluation of outcome prior learning is made as a continuous training during the semester. According ot the teaching, the assessment will be different: as a written exam, an oral exam, a record, a written report, peers review...


. AUBLIN systèmes mécaniques Dunod

. CALLOCH-MARQUIS les systèmes de transmissions Lavoisier

. Dufailly calcul de la capacité des engrenages Ellipse

. Henriot Théories des engrenages Dunod