The new roller bearings are available in 164 sizes in design variants NU, NJ and NUP. The bearing cages are available in roller-guided and outer ring-guided versions and are made from brass and polyamide. In addition to radial clearance groups CN (C0) for as standard, C3 and C4 groups are also available. Special versions, for example traction motor bearings (SQ1), wheel set bearings (SQ2) and electrically insulated bearings (SQ77) are available at short lead times.
To maximise their lifespan, the new cylindrical roller bearings are made from clean bearing steel. The superior surface finish of the raceways further helps reducing friction as well as lowering the operating temperature. The optimised geometries of raceways and rolling elements increase the loading capacity, while a modified cage design improves the formation of lubricant film. Thanks to the improved design of bearing guiding flanges for NJ and NUP variants, the bearings can take up higher axial loads. Misalignments can be compensated by modified contact geometry and crowned inner raceways. Tighter tolerances for the roller sorting ensure a uniform load distribution.
In addition to these numerous technical benefits, the new cylindrical roller bearings feature optimum operational reliability and maximum cost effectiveness. All NKE bearings are subjected to stringent quality procedures and are tested using state-of-the-art procedures and equipment. The Steyr site is certified to ISO 9001:2000 (design, development, production and distribution of bearings) and ISO 14001. In recognition of the exceptional quality of NKE’s products, the company was awarded the prestigious Austria Quality Seal earlier this year.