Ball Bearings

A ball bearing is a clever mechanical part that helps things spin smoothly with very little effort. Its main job is to reduce friction by changing rubbing (sliding friction) into rolling (rolling friction).
Here is the simple breakdown:
• Rolls, Not Rubs: The main idea is that things roll much more easily than they slide. A ball bearing uses small, hard, metal (or ceramic) balls that roll along a smooth track.
• Keeps Parts Separate: The balls fit between two metal rings (called "races"). One ring usually stays still, and the other spins. The balls keep the spinning part from grinding directly against the still part.
• Carries the Weight: It supports weight, or "loads," that push down on a spinning shaft (like a car's weight on its axle).
• Found Everywhere: You can find them in everyday items like skateboards, bicycles, ceiling fans, car wheels, and washing machines—anywhere a part needs to spin easily and quietly.
In short, a ball bearing is an essential component that uses rolling balls to make rotation effortless, efficient, and long-lasting.