Universal K-series needle roller assembly

The universal K series needle roller assembly is a centripetal needle roller unit (commonly known as "chicken cage bearing", complying with JB/T 7918 standard) consisting only of needle rollers and retaining frames without inner/outer rings. It relies on quenched and finely ground shaft necks and bearing seat holes as raceways, with extremely compact radial space and strong load-bearing capacity per unit area. It is suitable for pure radial heavy load and thin design, and is widely used in space sensitive transmission scenarios such as gearboxes, motors, and agricultural machinery.

Model Basic Dimensions Basic rated dynamic load Weight Type
Inner diameter Outer diameter Thickness Dynamic load Static load
[mm] [mm] [mm] (kN) (kN) （kg）
K18X25X17 18 25 17 16.7 18.6 0.015 Universal K-series needle roller assembly
K18X25X19 18 25 19 18.7 21.4 0.0188 Universal K-series needle roller assembly
K18X25X22 18 25 22 23.1 29 0.021 Universal K-series needle roller assembly
K18X26X14 18 26 14 14.6 14.4 0.023 Universal K-series needle roller assembly
K18X26X20 18 26 20 20 21.6 0.0181 Universal K-series needle roller assembly
K18X28X16 18 28 16 19.6 18.9 0.026 Universal K-series needle roller assembly
K19X23X13 19 23 13 9.5 13.5 0.024 Universal K-series needle roller assembly
K19X23X17 19 23 17 12.5 19.2 0.008 Universal K-series needle roller assembly
K20X24X10 20 24 10 8.9 12.6 0.011 Universal K-series needle roller assembly
K20X24X11 20 24 11 9.5 13.4 0.0065 Universal K-series needle roller assembly
K20X24X12 20 24 12 9.8 14.3 0.0072 Universal K-series needle roller assembly
K20X24X13 20 24 13 9.8 14.3 0.008 Universal K-series needle roller assembly
K20X24X17 20 24 17 12.9 20.4 0.009 Universal K-series needle roller assembly
K20X24X22ZW 20 24 22 13.7 21.3 0.012 Universal K-series needle roller assembly
K20X24X45ZW 20 24 45 16.4 27.1 0.0146 Universal K-series needle roller assembly
K20X25X25 20 25 25 19.9 29.8 0.028 Universal K-series needle roller assembly
K20X25X31.6ZW 20 25 31.6 21.7 33.2 0.0197 Universal K-series needle roller assembly
K20X25X40ZW 20 25 40 27.5 44.9 0.0265 Universal K-series needle roller assembly
K20X26X11 20 26 11 11.2 12.5 0.0325 Universal K-series needle roller assembly
K20X26X12 20 26 12 13.4 16.2 0.0111 Universal K-series needle roller assembly