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。
rigid alignment type, 0.8750 inches nominal outer ring width, 1.4990 inches minimum and 1.5000 inches maximum overall outside diameter, 0.4371 inches minimum and 0.4375 inches maximum bore diameter, 0.9375 inches minimum and 0.9380 inches maximum inner ring width