Rotating machinery refers to equipment that has parts that move in a circular motion. Common examples include electric motors, turbines, and pumps. These machines are essential in various industries, as they convert energy into mechanical work, enabling processes like generating electricity or moving fluids. The design and operation of rotating machinery involve principles of mechanical engineering and dynamics. Proper maintenance is crucial to ensure efficiency and prevent failures, as issues like imbalance or misalignment can lead to significant operational problems. Understanding the fundamentals of rotating machinery is vital for engineers and technicians in many fields.