Super-precision axial-radial cylindrical roller bearings in the NRT series
SKF super-precision axial-radial cylindrical roller bearings (NRT series) are suitable for arrangements that have simultaneously acting (radial and axial) loads as well as moment loads.
These bearings are an excellent solution for applications such as rotary tables and indexing heads of milling or drilling machines. Their internal design, together with close tolerance manufacturing processes, enable these bearings to attain radial run-out better than, and axial run-out close to, P4 tolerance class.
The SKF super-precision axial-radial cylindrical roller bearings consist of two roller and cage thrust assemblies and a full complement radial roller set; an inner ring which has an L-shaped cross section and two raceways; a loose flange; an outer ring.
The standard bearing does not contain lubricant (no designation suffix) and must be adequately lubricated with either grease or oil through the lubrication holes provided in the bearing rings.
Bearings that are pre-greased at the factory (suffix G) contain a grease that provides proper lubrication at high or slow speeds.
The range of NRT bearings series accommodates shaft diameters from 80 to 850 mm.
More information are provided in the relevant product section: