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）
NK45/30 45 55 30 44.5 95.7 0.138 NK series
NK47/20 47 57 20 31.5 62.3 0.095 NK series
NK47/30 47 57 30 45.2 99 0.144 NK series
NK50/25 50 62 25 43 85.2 0.159 NK series
NK50/35 50 62 35 58.1 125.5 0.225 NK series
NK55/25 55 68 25 45.4 94.1 0.193 NK series
NK55/35 55 68 35 61.3 138.3 0.255 NK series
NK60/25 60 72 25 47.5 103 0.187 NK series
NK60/35 60 72 35 64.1 151 0.26 NK series
NK65/25 65 78 25 49.6 111.8 0.225 NK series
NK65/35 65 78 35 67 164.8 0.315 NK series
NK68/25 68 82 25 54.8 116.7 0.25 NK series
NK68/35 68 82 35 72.1 165.7 0.35 NK series
NK70/25 70 85 25 55.5 120.6 0.28 NK series
NK70/35 70 85 35 73 170.6 0.395 NK series
NK73/25 73 90 25 61.1 126.5 0.335 NK series
NK73/35 73 90 35 80.4 180.4 0.475 NK series
NK75/25 75 92 25 62.2 130.4 0.345 NK series
NK75/35 75 92 35 82.7 186.3 0.485 NK series
NK80/25 80 95 25 59.4 137.3 0.315 NK series