Super-precision double row cylindrical roller bearings in the NN/NNK 30 series provide a unique balance between load carrying capacity, rigidity and speed. Having three flanges on the inner ring and no flanges on the outer ring, the bearings can accommodate axial displacement in both directions.
The use of high precision rolling bearings in machine tool industry makes great demands on the running accuracy of these bearings. Our high precision cylindrical roller bearings combine running accuracy characteristics with great stiffness and load carrying capacity while at the same time providing for a high speed capacity with a smaller cross section height. This smaller cross section height allows for lower centre distances for multi-spindle arrangements. High precision cylindrical roller bearings make for ideal floating bearings because they are able to compensate for heat-related changes in length that occur in adjacent parts.
Our high precision cylindrical roller bearings with cages are available in many different variations. They are manufactured as single row bearings in the 19 and 10 dimensional series, and as double row bearings in dimensional series 30 and 49. The bore diameter and outside diameter of both the single and double row cylindrical roller bearings are identical for the particular diameter series.
The high precision cylindrical roller bearings with the HN designation have an enhanced inner geometry that has been adapted to the high precision angular contact ball bearings and their rotational speed capacity. These bearings are the ideal complement to the performance range of the high precision cylindrical roller bearings.
NN/NNK : 3006 to 3016
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