Deep groove ball bearings are a type of rolling-element bearing that consists of an inner and outer ring, a set of steel balls, and a cage. They are one of the most commonly used types of bearings due to their versatility and ability to accommodate radial and axial loads in both directions. Deep groove ball bearings are designed to operate at high speeds and are suitable for a wide range of applications, including automotive, industrial machinery, and household appliances. They are known for their simple design, low friction, and high reliability, making them essential components in various mechanical systems.