Friction is a common physical phenomenon that occurs when two surfaces move against each other. It plays an important role in machines, vehicles, manufacturing systems, and daily life. Friction can be useful for walking, braking, and gripping, but excessive friction causes wear, heat generation, and energy loss. This paper presents a simple review of friction, its types, influencing factors, lubrication methods, and engineering applications. It also explains the importance of controlling friction for improved machine efficiency and longer service life.

Friction is an essential engineering phenomenon. It can be both useful and harmful depending on application. Proper understanding of friction, wear, and lubrication helps in improving efficiency, reducing maintenance cost, and increasing machine life. Future developments in tribology will support energy-saving and sustainable technologies.

1.Bowden, F.P., Tabor, D., The Friction and Lubrication of Solids. 2.Hsu, S., Ying, C., Zhao, F., Review on Friction Mechanisms. 3.Bhushan, B., Introduction to Tribology. 4.Blau, P.J., Friction Science and Technology. 5.Hutchings, I., Tribology and Wear Engineering.

© 2025 International Journal of Engineering and Techniques (IJET).

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