一種均質球體,由一系列球體構成,構成軸承中的滾動元件,即球(經過改良)。此部件主要用於減輕摩擦。它也可能用於其他用途,例如球式止回閥中的止回部件。不含:止回球;附孔球閥。
hardness shall be rb 54 to 72 with readings taken on parallel flats,per astm e 18 special features, qq-a-225/5 fed spec single material response overall material document and classification, aluminum alloy 2017 overall material, ball style designator, 0.0620 inches nominal rolling element diameter