A cylindrical item in which the inner or outer ring turns upon row(s) of hardened roller, bearing which roll on a raceway, thus minimizing friction. These items are characterized by their noncorrosive qualities, lightness of weight, inch dimensions rather than metric, inner rings generally projecting beyond the faces of the outer ring, or a very narrow width inner ring having an outside diameter slightly larger than the bore diameter. Designed primarily for use in aircraft assemblies, such as control systems and surfaces of aircraft. Excludes:bearing,roller,cylindrical.
c18a acft end item identification, 1.1820 inches minimum and 1.1870 inches maximum inner ring width, 0.3745 inches minimum and 0.3750 inches maximum bore diameter, 1.5620 inches minimum and 1.5625 inches maximum overall outside diameter, 0.8390 inches minimum and 0.8440 inches maximum outer ring width
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