Double row stud type track roller bearing NUKRE52 1.Raw material: O.R.16NiCr4, I.R. 18NiCr4, thrust washer 18NiCrMo5, Rollers 100Cr6. 2.Tolerance: DIN620, 3.Precession: P0, Stud type track roller of this series are full complement cylindrical roller bearings made according to DIN620. The thick walled outer ring in high quality and casehardened steel is of the same type as the one used for the LIBE yoke type track rollers of series ''TR'' and therefore offers the same high reliability and technology.