A Rising Whine in a Shopping Mall: Dry Motor Bearings That Almost Took the Whole Motor
Last updated: 2 Sep 2026 | 26 Views |
A Rising Whine in a Shopping Mall: Dry Motor Bearings That Almost Took the Whole Motor
Sound is information your machine gives you continuously. Of all warning signs, a change in sound is the easiest to notice and the most frequently ignored.
ULV foggers used in commercial buildings such as shopping malls work under fairly specific conditions: at night after closing, reasonably quietly, and continuously for several hours.
The heart of such a machine is a high-speed motor, turning on bearings that absorb speed, heat and vibration for as long as it runs.
When those bearings begin to fail, the first thing that changes is the sound. This is the true story of a mall team who heard that sound every night for two months before deciding to act.
