A mechanical bearing is a machine element designed to support relative motion between two moving components while minimizing the friction and wear generated at the interface. By reducing the coefficient of friction, bearings facilitate the efficient transmission of mechanical power, enabling the operation of various machines ranging from simple rotational axes to complex gear trains. Different structural types, such as ball bearings, roller bearings, and fluid journal bearings, are employed based on the required load capacity, operational speed, and the specific dynamics of the applied force. These devices typically function in conjunction with a lubricating medium, which separates the surfaces, dissipates heat, and ensures the longevity and reliable performance of the mechanical system.