... torqueGoodGoodFairHigh speedGoodGoodFairSealed grese lubrictionFairGoodExcellentDustproofFairGoodExcellentWaterproofPoorFairgood SeriesBore Diameter(mm)Variant Structure600010~260Z,2Z,RZ,2RZ,RS1,2RS1,N,RN,ZN,RZN6000240~1000Z ... ,ZN,RZN6180010~320Z,2Z,RZ,2RZ61800340~1200Z,2Z,RZ6190010~280Z,2Z,RZ,N,NR,ZN,61900300~1000Z,2Z,RZMini bearings1~10Z,2Z,RS,2RS,F60000 ...