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）
K55X61X30 55 61 30 48 113 0.052 Universal K-series needle roller assembly
K55X62X18 55 62 18 35.5 70 0.081 Universal K-series needle roller assembly
K55X63X15 55 63 15 25 41 0.052 Universal K-series needle roller assembly
K55X63X20 55 63 20 40 74 0.053 Universal K-series needle roller assembly
K55X63X25 55 63 25 50 100 0.067 Universal K-series needle roller assembly
K55X63X32 55 63 32 62 130 0.08 Universal K-series needle roller assembly
K56X61X20 56 61 20 27.5 65 0.102 Universal K-series needle roller assembly
K58X63X17 58 63 17 27 64 0.045 Universal K-series needle roller assembly
K58X63X20 58 63 20 29.3 69.4 0.043 Universal K-series needle roller assembly
K58X64X19 58 64 19 35 78 0.0445 Universal K-series needle roller assembly
K58X64X20 58 64 20 33.6 72.5 0.046 Universal K-series needle roller assembly
K58X65X18 58 65 18 35 70 0.0545 Universal K-series needle roller assembly
K58X65X36ZW 58 65 36 49 107 0.052 Universal K-series needle roller assembly
K60X65X20 60 65 20 29.5 72 0.127 Universal K-series needle roller assembly
K60X65X30 60 65 30 42.5 116 0.052 Universal K-series needle roller assembly
K60X66X19 60 66 19 33.5 73.5 0.077 Universal K-series needle roller assembly
K60X66X20 60 66 20 33.5 73.5 0.053 Universal K-series needle roller assembly
K60X66X30 60 66 30 49 45.5 0.056 Universal K-series needle roller assembly
K60X66X33ZW 60 66 33 46 112 0.058 Universal K-series needle roller assembly
K60X66X40ZW 60 66 40 58 151 0.104 Universal K-series needle roller assembly