単列または複数列の硬化円筒ころとリテーナー(内輪または外輪の有無を問わず)で構成される非調整式ころ軸受。軸受、ころ、機体は除く。
roller, rxr part name assigned by controlling agency, steel comp 316 roller material, 3.530 inches nominal overall length, steel comp w5 ball material, 2.000 inches nominal overall width