The present book Machine Design cater to the needs of wide cross-section of readers. The engineering, degree and diploma students, those preparing for membership examination of professional institutions and degree holders preparing for competitive examinations organized by UPSC, Public and Private Sectors can directly benefit from this book. The book provides a great deal of data on various aspects of machine elements, their manufacturing and materials used, so that the practicing engineers will also find it useful. The book includes a number of solved and unsolved examples. The solved examples are given in detail and students can feel the application of theory to the fullest extent and may appreciate how such theories are modified in practice. The short or multiple choice questions have been added to achieve the objective of removing doubts from mind regarding exactness of a solution.