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。
0.4990 inches minimum and 0.5010 inches maximum rolling element diameter, plastic overall material, delrin mfr ref single material response overall material document and classification, ball style designator, afbma standard tolerance for plastic balls,grade 1 special features