Frequent Employs: to supply a concrete mass, for base-mounted centrifugal pumps, that prevents differential movement between driving and pushed members, related by a flex drive; to lessen the huge vibration amplitude (unbalanced forces) located in air compressors and vacuum pumps; to decrease the middle of gravity of tall, slim units; https://holdennjeyr.pointblog.net/the-vibration-isolation-inertia-base-diaries-89454582