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)
NK16/20 16 24 20 15.6 20.4 0.029 NK series
NK17/16 17 25 16 12.8 16.3 0.0245 NK series
NK17/20 17 25 20 16.3 22.1 0.0305 NK series
NK18/16 18 26 16 13.4 17.5 0.0255 NK series
NK18/20 18 26 20 17 23.6 0.032 NK series
NK19/16 19 27 16 14 18.7 0.027 NK series
NK19/20 19 27 20 17.7 25.3 0.034 NK series
NK20/16 20 28 16 13.9 18.7 0.0275 NK series
NK20/20 20 28 20 17.6 25.4 0.0355 NK series
NK21/16 21 29 16 14.4 20 0.029 NK series
NK21/20 21 29 20 18.2 27.1 0.036 NK series
NK22/16 22 30 16 14.9 21.2 0.03 NK series
NK22/20 22 30 20 18.9 28.7 0.0375 NK series
NK24/16 24 32 16 15.3 22.6 0.032 NK series
NK24/20 24 32 20 19.4 30.5 0.0405 NK series
NK25/16 25 33 16 15.8 23.7 0.0335 NK series
NK25/20 25 33 20 20 32.2 0.042 NK series
NK26/16 26 34 16 16.3 24.9 0.0345 NK series
NK26/20 26 34 20 20.6 33.7 0.0435 NK series
NK28/20 28 37 20 21.7 37.1 0.0515 NK series