This book introduces an innovative method for producing toothed parts through cold rotary forging, offering a cost-effective and energy-efficient alternative to traditional techniques like machining and casting. Designed for practical application, it presents a tool compatible with conventional lathes to form externally toothed parts in a single stroke. Through experiments using lead specimens, the book examines the influence of key process parameters-rotational speed, axial feed, and tool inclination-on the forming load. The results demonstrate near-complete material filling of the die...