Chap. 5.1 Introduction Chap. 5.2 The fundamental law of gearing Chap. 5.3 Gear tooth nomenclature Chap.5.4 Condition for Correct Meshing Chap. 5.5 Contact Ratio Chap. 5.6 Interference and undercutting Chap. 5.7 Gear types and Application Chap. 5.8 Ordinary gear trains Chap.5.9 Epicyclic or planetary gear trains Chap. 5.10 Applications of gear train