Track roller bearing LFR, R 1.Material:GCr15,100Cr6,52100 2.Retainer:nylon,steel cage 3.Reliable quality 4.Various structure Track roller bearing LFRDescription:Refined bearing steelPrecision gradeCompetitive price LFR Series track rollers bearings Bearing No. Dimension (mm) BallMassOur No.NIKOdwB.DO.Dnumbers(g)LFR50/4NPP 5413187LFR50/5-4KDDR50/5-4ZZ4516189LFR50/5-4NPPR50/5-4 2RS4516189LFR50/ ...