A bushing is a cylindrical lining or sleeve used to reduce friction and wear between moving parts in machinery. It is typically made from materials like bronze, plastic, or rubber and is designed to fit inside a hole or around a shaft. Bushings help support rotating or sliding components, ensuring smooth operation and extending the lifespan of the equipment. Bushings are commonly found in various applications, including automobiles, industrial machinery, and electrical devices. They can serve multiple purposes, such as providing insulation, reducing noise, or acting as a pivot point. Proper selection and maintenance of bushings are essential for optimal performance.