A hydrodynamic bearing is a type of bearing that supports a rotating shaft using a thin film of lubricant, typically oil. This lubricant creates a wedge-shaped gap between the bearing surfaces, allowing the shaft to float and reducing friction. As the shaft rotates, it generates pressure in the lubricant, which helps maintain the separation between the surfaces, minimizing wear and extending the bearing's lifespan. These bearings are commonly used in various applications, including electric motors, turbines, and compressors. Their design allows for smooth operation at high speeds and loads, making them essential in industries where reliability and efficiency are crucial.