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。
steel comp e52100 overall material, ball style designator, 0.2495 inches nominal rolling element diameter, 66,aisi/sae e52100 fed std single material response overall material document and classification, afbma std tolerance for balls, grade 25 standard tolerance designation