feather key


noun Machinery.

a rectangular key connecting the keyways of a shaft and a hub of a gear, pulley, etc., fastened in one keyway and free to slide in the other so that the hub can drive or be driven by the shaft at various positions along it.

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anchorite
Also called feather, spline.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020