No, it is not normal for a residential ceiling fan to shake, sway, or wobble noticeably during operation, especially when running on low or medium speed settings. While a microscopic vibration can sometimes occur at maximum high speed due to slight aerodynamic wind resistance against blade edges, any noticeable shaking, swaying, or rattling of the blades, light kit, or ceiling canopy indicates an underlying mechanical problem such as accumulated dust, loose bracket screws, or an unbalanced blade assembly. You can troubleshoot mechanical stability easily by observing blade tracking. You can verify that your corrective action is successful when tightening loose mounting hardware, cleaning dust off the blades, and balancing weight distribution stops the shaking and allows the fan to spin in a steady, flat plane.
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