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）
K35X43X18 35 43 18 28.5 42 0.106 Universal K-series needle roller assembly
K35X45X20 35 45 20 37 50 0.038 Universal K-series needle roller assembly
K35X45X30 35 45 30 53 79 0.056 Universal K-series needle roller assembly
K35X45X49 35 45 49 82 139 0.08 Universal K-series needle roller assembly
K36X42X16 36 42 16 24.6 42.5 0.138 Universal K-series needle roller assembly
K36X42X46ZW 36 42 46 51 106 0.029 Universal K-series needle roller assembly
K37X42X13 37 42 13 15.9 27.1 0.086 Universal K-series needle roller assembly
K37X42X17 37 42 17 22.4 43 0.021 Universal K-series needle roller assembly
K37X42X27 37 42 27 32 68 0.022 Universal K-series needle roller assembly
K37X44X18 37 44 18 26.3 41 0.041 Universal K-series needle roller assembly
K37X45X26 37 45 26 44 74 0.042 Universal K-series needle roller assembly
K38X43X17 38 43 17 20.5 38.5 0.061 Universal K-series needle roller assembly
K38X43X27 38 43 27 31.5 68 0.029 Universal K-series needle roller assembly
K38X44X17 38 44 17 23.8 40.4 0.043 Universal K-series needle roller assembly
K38X46X20 38 46 20 35.5 57 0.0305 Universal K-series needle roller assembly
K38X46X32 38 46 32 55 99 0.047 Universal K-series needle roller assembly
K39X44X24 39 44 24 28.5 59 0.076 Universal K-series needle roller assembly
K39X44X26ZW 39 44 26 27.5 56 0.03 Universal K-series needle roller assembly
K40X44X13 40 44 13 14 28.5 0.045 Universal K-series needle roller assembly
K40X45X13 40 45 13 17.6 32.5 0.018 Universal K-series needle roller assembly