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）
K60X68X15 60 68 15 27.2 119 0.116 Universal K-series needle roller assembly
K60X68X20 60 68 20 43.5 85 0.084 Universal K-series needle roller assembly
K60X68X23 60 68 23 49.5 101 0.071 Universal K-series needle roller assembly
K60X68X25 60 68 25 53 111 0.094 Universal K-series needle roller assembly
K60X68X27 60 68 27 49.5 100 0.089 Universal K-series needle roller assembly
K60X68X30ZW 60 68 30 44.5 88 0.114 Universal K-series needle roller assembly
K60X68X34ZW 60 68 34 48 96 0.129 Universal K-series needle roller assembly
K60X72X36 60 72 36 86.7 152 0.14 Universal K-series needle roller assembly
K60X75X42 60 75 42 118 199 0.205 Universal K-series needle roller assembly
K61X66X20 61 66 20 29.7 71.5 0.24 Universal K-series needle roller assembly
K61X66X30 61 66 30 43.5 116 0.054 Universal K-series needle roller assembly
K62X70X40ZW 62 70 40 66 146 0.073 Universal K-series needle roller assembly
K63X70X21 63 70 21 45.5 101 0.174 Universal K-series needle roller assembly
K63X71X20 63 71 20 39.5 74.4 0.066 Universal K-series needle roller assembly
K64X70X16 64 70 16 28 60 0.0795 Universal K-series needle roller assembly
K65X70X20 65 70 20 30.5 77 0.053 Universal K-series needle roller assembly
K65X70X30 65 70 30 44 124 0.056 Universal K-series needle roller assembly
K65X73X20 65 73 20 41.2 79.6 0.083 Universal K-series needle roller assembly
K65X73X23 65 73 23 46 94 0.0835 Universal K-series needle roller assembly
K65X73X30 65 73 30 57 123 0.108 Universal K-series needle roller assembly