BTW - some other applications of a dynamic vibration absorber is when they suspend the AC units in a large skyscraper in a cradle held by a specific spring rate spring. The AC unit will rock back and forth at the same frequency the building wants to sway in heavy wind, thus damping the movement at its natural frequency.
Some high end bows(like bow and arrows) have these little flexible rods coming off them that vibrate like an MFer after you fire it, in effect countering the vibration of the bow frame itself.
I do think solid crank pulleys are a reason why the RB guys eat oil pumps for breakfast so often. They are now starting to learn that a crankshaft damper is a good thing, and are going for ATI stuff.
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