Mechanical design of machine components requires performing calculations using formulas, which is usually a sophisticated and time-consuming procedure. This book aims to provide students, engineers, practicing engineers, technicians and manufacturers, and machine builders with an easy-to-use reference; which is based on using graphs instead of complicated formulas for designing common machine elements. Using this book, you can easily perform the most complicated calculations of machine elements in a few minutes and quickly. In this book, all graphs are drawn based on the latest formulas and experimental and laboratory data that cannot be found in any book. A special characteristic of this book is, proposing a simple, rapid, and novel method for a rough design of some of the elements based on the shaft size. We refer to this method as the M.Y method. The method is very useful for maintenance and repair engineers. They can quickly find solutions for replacing parts by applying the method.