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）
K20X26X13 20 26 13 14.4 17.9 0.011 Universal K-series needle roller assembly
K20X26X14 20 26 14 13.7 16.4 0.012 Universal K-series needle roller assembly
K20X26X17 20 26 17 19.2 26 0.0142 Universal K-series needle roller assembly
K20X26X20 20 26 20 21.1 29 0.016 Universal K-series needle roller assembly
K20X26X24 20 26 24 22.5 30.9 0.019 Universal K-series needle roller assembly
K20X26X27 20 26 27 26 37.3 0.024 Universal K-series needle roller assembly
K20X28X14 20 28 14 15.7 16.1 0.0265 Universal K-series needle roller assembly
K20X28X16 20 28 16 19.8 22.4 0.02 Universal K-series needle roller assembly
K20X28X20 20 28 20 23.9 28.5 0.02 Universal K-series needle roller assembly
K20X28X25 20 28 25 30.5 39 0.027 Universal K-series needle roller assembly
K20X30X30 20 30 30 35.5 41.5 0.032 Universal K-series needle roller assembly
K20X32X25 20 32 25 30.8 30.5 0.049 Universal K-series needle roller assembly
K21X25X13 21 25 13 10.1 15.1 0.0495 Universal K-series needle roller assembly
K21X25X17 21 25 17 13.3 21.5 0.009 Universal K-series needle roller assembly
K21X26X10 21 26 10 9.09 11 0.01 Universal K-series needle roller assembly
K21X26X11 21 26 11 9.39 11.5 0.0085 Universal K-series needle roller assembly
K22X26X10 22 26 10 9.1 13.4 0.0096 Universal K-series needle roller assembly
K22X26X11 22 26 11 10.1 14.9 0.0075 Universal K-series needle roller assembly
K22X26X13 22 26 13 10.4 15.9 0.0079 Universal K-series needle roller assembly
K22X26X17 22 26 17 13.7 22.7 0.0095 Universal K-series needle roller assembly