一種單排或多排減摩軸承,帶或不帶內圈或外圈,其特點是滾輪尺寸相對較小,直徑通常不超過 0.250 英吋(6.35 毫米),長度通常比直徑長。
19.990 millimeters minimum and 20.000 millimeters maximum bore diameter, steel overall material, rigid alignment type, 25.880 millimeters minimum and 26.000 millimeters maximum overall width, 34.989 millimeters minimum and 35.000 millimeters maximum overall outside diameter