NK series

The NK series is a single row light series needle roller bearing without an inner ring and a dual gear edge solid ring. The core unit is composed of a dual gear edge solid outer ring and a needle roller holder assembly. The design without an inner ring makes the radial section extremely compact. It relies on a quenched and finely ground journal as the inner raceway and only bears pure radial loads. It is suitable for general industrial scenarios with medium low speed, medium heavy load, and limited radial installation space. It is a mainstream radial support accessory for motors, transmissions, automation equipment, light industrial machinery, etc.

Model Basic Dimensions Basic rated dynamic load Weight Type
Inner diameter Outer diameter Thickness Dynamic load Static load
[mm] [mm] [mm] (kN) (kN) （kg）
NK165/42 165 190 42 160 400 1.66 NK series
NKI5/12 5 15 12 5.1 4.7 0.012 NK series
NKI5/16 5 15 16 7.1 7.3 0.016 NK series
NKI6/12 6 16 12 5.5 5.3 0.013 NK series
NKI6/16 6 16 16 7.6 8.2 0.017 NK series
NKI7/12 7 17 12 5.9 6 0.014 NK series
NKI7/16 7 17 16 8.2 9.2 0.018 NK series
NKI9/12 9 19 12 6.6 7.3 0.018 NK series
NKI9/16 9 19 16 9.2 11.2 0.022 NK series
NKI10/16 10 22 16 11.8 13.7 0.03 NK series
NKI10/20 10 22 20 14.8 18.5 0.038 NK series
NKI12/16 12 24 16 12.3 15.1 0.033 NK series
NKI12/20 12 24 20 15.6 20.4 0.042 NK series
NKI15/16 15 27 16 14 18.7 0.039 NK series
NKI15/20 15 27 20 17.7 25.3 0.045 NK series
NKI17/16 17 29 16 14.4 20 0.042 NK series
NKI17/20 17 29 20 18.2 27.1 0.053 NK series
NKI20/16 20 32 16 15.3 22.6 0.049 NK series
NKI20/20 20 32 20 19.4 30.5 0.061 NK series
NKI22/16 22 34 16 16.3 24.9 0.046 NK series