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。
0.3020 inches minimum and 0.3120 inches maximum overall width, steel overall material, 0.5000 inches nominal overall outside diameter, rigid alignment type, 0.3125 inches nominal bore diameter