... ) 100Cr6---Germany 2.Precision level:ABEC-1,ABEC-3,ABEC-5 P0/ P6 /P5/P4 3.Fields Used in : Motorcycle , Motor , Pump , ... possoble to reach certain radial internal clearance or certain preload.3.Four Row Cylindrical Roller BearingFour Row Cylindrical Roller BearingS are ... 2.Optimizing design of bearings ribs9can bear higher axial load)3.Smaller tolerance of roller(average load is well distributed NU2203E ...