以下深沟球轴承的 外径 都不大于26mm内径3mm:623,内径4mm:618/4,619/4,604,624,634,内径5mm:618/5,619/5,625,635内径6mm:618/6,619/6,626内径7mm:618/7,619/7,607,627内径8mm:618/8,619/8, 608, 628内径9mm:618/9,619/9, 609, 629内径10mm:61800, 61900, 6000内径12mm:61801, 61901内径15mm:61802内径17mm:61803