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）
K30X35X20 30 35 20 21.6 37.5 0.019 Universal K-series needle roller assembly
K30X35X24 30 35 24 24.9 45.1 0.025 Universal K-series needle roller assembly
K30X35X26ZW 30 35 26 24 44 0.0285 Universal K-series needle roller assembly
K30X35X27 30 35 27 30.5 59 0.036 Universal K-series needle roller assembly
K30X36X13 30 36 13 15.8 22.1 0.03 Universal K-series needle roller assembly
K30X36X14 30 36 14 18.6 27.4 0.0191 Universal K-series needle roller assembly
K30X36X20 30 36 20 23.3 36.5 0.022 Universal K-series needle roller assembly
K30X36X30 30 36 30 33.2 57.5 0.0295 Universal K-series needle roller assembly
K30X37X15 30 37 15 19.5 26 0.0415 Universal K-series needle roller assembly
K30X37X16 30 37 16 23.1 33.5 0.026 Universal K-series needle roller assembly
K30X37X18 30 37 18 26 38.5 0.027 Universal K-series needle roller assembly
K30X37X20 30 37 20 24.7 35.4 0.03 Universal K-series needle roller assembly
K30X37X23 30 37 23 28.5 42.5 0.035 Universal K-series needle roller assembly
K30X37X48ZW 30 37 48 40 65.5 0.0395 Universal K-series needle roller assembly
K30X38X18 30 38 18 26.2 34.8 0.075 Universal K-series needle roller assembly
K30X38X24 30 38 24 33.2 47.2 0.0365 Universal K-series needle roller assembly
K30X40X18 30 40 18 32 40 0.0485 Universal K-series needle roller assembly
K30X40X30 30 40 30 49 69 0.048 Universal K-series needle roller assembly
K30X42X32 30 42 32 54 68.1 0.073 Universal K-series needle roller assembly
K30X42X37ZW 30 42 37 55.9 71.3 0.093 Universal K-series needle roller assembly