N type, NU type, NN type and NNU type Cylindrical roller bearings are suitable for the free side bearing.
NF, NJ, NUH Cylindrical roller bearings have the capacity to bear the axial load.
The NUH type bearing structure is NU type bearing added with retainer rings ( L ring ).
NH type, NP type and NUP type bearing with the ability to bear two-way axial load.
Cone hole NN30 series cylindrical roller bearings are mainly used as radial bearing in machine tool spindle.