... 2000 5.brand:NSK,NTN,NACHI,KOYO 1.NSK/NTN/NACHI/KOYO BEARINGS2.detail sort : 1) deep groove ball bearings(6000 series) ... 2) tapered roller bearings(30000 ... NSK,NTN,NACHI,KOYO4.material:bearing steel Gr15 AISL52100,DIN100CR65.accuracy class : P0,P6,P5,P4,P2NSK BEARINGSNACHI BEARINGS NSK/NTN/NACHI/KOYO BEARINGS ...