A rotating shaft is a mechanical component used to transmit rotary motion between two or more parts of a machine. Constructed typically from durable materials like steel or aluminum, it features a cylindrical shape and precision machining to ensure smooth operation. Rotating shafts vary in size and design based on their intended application, from small drive shafts in motors to larger shafts in industrial machinery. Lubrication is essential to reduce friction and wear, maintaining efficiency and prolonging the lifespan of the shaft. Additionally, some shafts may incorporate features such as keyways or splines to securely connect with other components.