Book excerpt: This book presents select proceedings of the 8th International and 29th All India Manufacturing Technology, Design and Research Conference (AIMTDR 2021). It covers the recent developments in the areas of product design and development, computer-aided design, computer-aided manufacturing, computer-aided engineering, reverse engineering, modelling and simulation of manufacturing systems, simulation of manufacturing processes, vibration analysis, machine tool design and development, optimization techniques, etc. The contents of this book will be useful for students, researchers and as well as industry professionals in the various fields of mechanical engineering.