Designation Bore diameter Outside diameter Width Basic dynamic load rating Limiting speed
    [mm] [mm] [mm] [kN] [ r/min]
    W 638/4-2RS1 4 9 4 0.364 40000
    W 638/5-2RS1 5 11 5 0.403 34000
    W 639-2Z 9 30 10 4.36 30000
    WBB1-8705-2Z 5 10 4 0.247 67000