Cylindrical roller bearings, double row, super-precision. Tolerances: SP, UP, SP and UP for 1:12 tapered bore, Chamfer NNU 4922 BK/SPW33. Dimensions
to be between 60-80% of the tightening value, depending on NNU, NN. Needle roller bearings. - NA. Spherical roller bearings. Tapered roller bearings.
There are different types designated as NU, NJ, NUP, N, NF (for single-row bearings), NNU, and NN (for double-row bearings depending on the design or
Deep groove ball bearings, single row. Tolerances: Normal (metric), Normal (inch) · Radial internal clearance: Single bearings, Matched bearing pairs