What is the purpose of dynamic balancing in rotating machinery?

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The main idea is to keep the rotor from vibrating while it spins by making the mass distribution even during operation. When a rotor has any off-axis mass, centrifugal forces push on it as speeds increase, causing vibration, noise, and extra wear. Dynamic balancing fixes this by placing corrective weights or adjusting components so the mass is balanced through the entire rotation, not just when the machine is at rest. This reduces vibration at operating speeds, protecting bearings, seals, and foundations. Static balancing, which only ensures balance at rest, won’t guarantee smooth running once the rotor is spinning, so dynamic balancing is necessary for rotating equipment.