JIS B 1509:2020规定了尺寸系列18和19以及直径系列0、2、3和4中径向轴承的卡环槽尺寸和公差值、外圈卡环槽侧的倒角尺寸、定位卡环（以下简称卡环）的尺寸和公差值（直径系列0、2、3和4除外） 尺寸系列00、82和83），符合JIS B 1512-1的规定。

JIS B 1509:2020 specifies the snap ring groove dimensions and tolerance values, chamfer dimensions on the snap ring groove side of the outer ring, and the dimensions of locating snap ring (hereafter referred to as snap rings) and tolerance values for radial bearings in the dimension series 18 and 19 and the diameter series 0, 2, 3, and 4 (except dimension series 00, 82, and 83), as specified in JIS B 1512-1.