The present edition is thoroughly revised and enlarged in the sense that many new topics are included making this book almost complete for the undergraduate students mainly. Some existing chapters such as on Casting has been recast. Some additional figures have been placed replacing old ones and more explanations provided making it easily palatable for the readers. In the chapter of Lather machine Turret lathe, Capstan Lathe, Automatic Lathe, Screw cutting Lathe etc. are included. A chapter on Thread manufacturing which has types of threads, thread nomenclature, various thread manufacturing technology, including thread rolling method. Gear cutting, Gear finishing, gear defects, gear nomenclatures, as aslo added.