The book systematically illuminates the fundamentals of die forging and presents the various processes, applications, and their calculations. It covers different materials, work processes, heat treatments, tools, and machines (with a special focus on spindle presses). The numerous manufacturing examples include tips for practical design of die-forged parts. Die forging is a hot bulk forming process. According to DIN 8583, it belongs to the pressure forming processes with mutually moving forming tools, where the material is pressed in a specific direction and takes on the shape of the engravings present in the die. The raw part is heated to approximately 1200 °C and is reshaped through several intermediate forms into the finished workpiece. The workflow consists of mass distribution and cross-section preforming.