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gear ratio

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noun Machinery.
the ratio of the rotational speeds of the first and final gears in a train of gears or of any two meshing gears.
the ratio of the diameters of the pitch surfaces of any two meshing gears or of the numbers of their teeth.
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Origin of gear ratio

First recorded in 1905–10
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022

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