This book presents a method for calculating the accuracy of kinematic chains in metal-cutting machines, including gear and thread processing equipment, and examines how these calculations influence the precision of the finished products—such as gear and worm wheels. It is designed for students across all forms of study and degree levels—bachelor’s, specialist’s, and master’s—in programs like 151000, 151900 "Design and Technological Support of Mechanical Engineering Production," 150900 "Technology, Equipment, and Automation of Mechanical Engineering," and 150700 "Mechanical Engineering." The book is particularly useful for those studying courses such as "Metal-Cutting Machines," "Calculation, Modeling, and Design of Computer-Controlled Equipment," "Mathematical Modeling in Mechanical Engineering," as well as for students working on diploma projects, coursework, or master's theses related to these disciplines.