The book--Machine Design is intended as a bilingual teaching (Chinese and English) textbook for students who take the course- -Machine Design, including two volumes: Mechanisms Design (Vol. 1) and Design of Mechanical Elements (Vol. 2) . This book is the Volume 2 and consists of six chapters. Chapter 1 is general introduction of machine design and design of mechanical elements. Chapter 2 is the design of fastenings including screw fastenings, keys and pins, force fit joints, riveted joints, weld