Slowest rotating manmade object

According to Official Guinness Records,

The last sprocket in a set of reducing gear wheels in a demonstration apparatus designed by TJ Bivins of Wellsville, Kansas, USA, rotates so slowly that it would take 3,800,007,600 years for it to complete one revolution. The assembly is driven by a motor turning at 1,550 rpm.

For a complete list of 2004 records, please visit 2004 Guinness Records in United States.

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