A Disk brake rotor play a critical role in modern automotive braking systems, providing the essential mechanism for converting kinetic energy into thermal energy, thereby facilitating vehicle deceleration. This abstract delves into the fundamental principles, design considerations, materials, and performance characteristics of disk brake rotors. Firstly, the abstract elucidates the operating principles of disk brake rotors within the context of automotive braking systems. It explores how the rotational motion of the wheel translates into frictional forces acting on the rotor surface, generating heat that dissipates through conduction and convection.Secondly, it discusses the key design considerations influencing the efficiency and reliability of disk brake rotors. Factors such as rotor diameter, thickness, ventilation, and surface geometry are analysed for their impact on heat dissipation, wear resistance, and braking performance. Furthermore, the abstract addresses the materials commonly employed in disk brake rotor construction. Traditional materials like cast iron are contrasted with newer alternatives such as carbon-ceramic composites, examining their respective advantages in terms of weight, thermal conductivity, durability, and cost. Moreover, the abstract explores the performance characteristics of disk brake rotors under various operating conditions. It discusses phenomena such as brake fade, hot spotting, and thermal deformation, elucidating the factors contributing to rotor wear and degradation over time