Types NU, N, NNU, and NN are suitable as free-end bearings. Table 1 Standard Cages for Cylindrical Roller Bearings NU, NJ, NUP, NH, and NNU & Fw.
Bearings, units and housings Cylindrical roller bearings, double row, super-precision Designation bearing: d, D, B, C, C0, Pu . NNU 4920 BK/SPW33 .. For additional information about the meaning and limitations of the product data,