... grese lubrictionFairGoodExcellentDustproofFairGoodExcellentWaterproofPoorFairgood SeriesBore Diameter(mm)Variant Structure600010~260Z,2Z,RZ,2RZ,RS1,2RS1,N,RN,ZN,RZN6000240~1000Z,2Z ... ,ZN,RZN640010~100N,NR6400110~1200N,NR1600010~26016000280~1000Z,2Z,RZ,2RZ,RS1,2RS1,N,RN,ZN,RZN6180010~320Z,2Z ... ,RZ,2RZ61800340~1200Z,2Z,RZ6190010~280Z,2Z,RZ,N,NR,ZN,61900300~1000Z,2Z, ...