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