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）
K75X81X30 75 81 30 52 143 0.079 Universal K-series needle roller assembly
K75X82X21 75 82 21 46 106 0.114 Universal K-series needle roller assembly
K75X83X20 75 83 20 43.8 90.2 0.088 Universal K-series needle roller assembly
K75X83X23 75 83 23 50 109 0.0945 Universal K-series needle roller assembly
K75X83X25 75 83 25 54.8 120 0.124 Universal K-series needle roller assembly
K75X83X30 75 83 30 62 143 0.116 Universal K-series needle roller assembly
K75X83X35ZW 75 83 35 63 147 0.147 Universal K-series needle roller assembly
K75X83X40ZW 75 83 40 73 177 0.182 Universal K-series needle roller assembly
K80X86X20 80 86 20 38.5 98 0.211 Universal K-series needle roller assembly
K80X86X30 80 86 30 56 159 0.06 Universal K-series needle roller assembly
K80X88X22 80 88 22 49.7 108 0.079 Universal K-series needle roller assembly
K80X88X23 80 88 23 53 118 0.11 Universal K-series needle roller assembly
K80X88X25 80 88 25 56.4 127 0.125 Universal K-series needle roller assembly
K80X88X26 80 88 26 61 142 0.123 Universal K-series needle roller assembly
K80X88X30 80 88 30 71 176 0.131 Universal K-series needle roller assembly
K80X88X40ZW 80 88 40 76 192 0.138 Universal K-series needle roller assembly
K80X88X46ZW 80 88 46 88 231 0.227 Universal K-series needle roller assembly
K85X91X12 85 91 12 25.2 56.7 0.26 Universal K-series needle roller assembly
K85X92X20 85 92 20 44.5 108 0.0445 Universal K-series needle roller assembly
K85X92X30 85 92 30 66 176 0.102 Universal K-series needle roller assembly