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。
steel overall material, 19.75 millimeters minimum and 20.00 millimeters maximum overall width, rigid alignment type, 7.991 millimeters minimum and 8.000 millimeters maximum bore diameter, 13.977 millimeters minimum and 13.995 millimeters maximum overall outside diameter