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How to Specify the Gearmotor That Will Run the Quietest

How quiet is quiet enough? Where the end-use equipment will be situated often determines the tolerable amount of noise and vibration in a gearmotor application. Office machines and medical devices, for example, require quiet, vibration-free operation, while machine tools and ice dispensers may not. Finding the cure for noise and vibration starts with understanding the cause. Excitation at the gear mesh is a primary source. It can result from gear handling damage such as nicks or burrs, meshing errors, shaft deflection or dynamic bearing loads. Harmonic resonance with gear housings and driven machinery can amplify it. Sheet-metal housings enclosing overall equipment can act as multipliers and are notorious culprits.

As an engineer myself, I’ve insisted that the manufacturing processing for Bison Gearmotors immunize them — and our customers — from any flaws that might create unacceptable noise and vibration — and that our application engineering staff be sensitive to the techniques and materials that muffle sound and minimize noise vibration. As a final quality check, each Bison Gearmotor is sound tested at full load torque after final assembly.

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