352226X2-2RZ 197726 Railway train bearings
352226X2‑2RZ (old designation:197726), sealed double‑row tapered roller bearing for Chinese railway freight wagons, manufactured according to GB/T 25770‑2024. Equipped with 2RZ double‑lip rubber seals, pre‑greased maintenance‑free cartridge axle‑box bearing. It bears heavy radial load and bidirectional axial loads, widely applied on speed‑increased freight wagon wheelsets. Carburized bearing steel with phosphating anti‑rust treatment, ready‑to‑mount for railway service.
| 项目 Item | 公制 Metric |
|---|---|
| 内径 d Bore | 130 mm |
| 外径 D Outer Diameter | 230 mm |
| 装配总宽 T Overall width | 150 mm |
| 重量 Weight | 28.8 kg |
| 参数 Rating | 公制 Metric | ||
|---|---|---|---|
| Cr 动态额定载荷 | 882 000 N (882 kN) | ||
| Cor 静态额定载荷 | 1 590 000 N (1590 kN) | ||
| e | 0.43 | ||
| Y1 | 1.6；Y2 | 2.3；Y0 | 1.6 |
Cartridge integrated design with 2RZ double‑lip contact seals, dust‑proof & water‑proof, retain internal grease for long‑term maintenance‑free railway operation.
G20CrNi2MoA carburized steel, logarithmic crowned roller‑raceway profile, reduces edge stress, excellent shock‑fatigue performance for heavy‑haul wagon service.
Full phosphating anti‑rust treatment, factory pre‑filled railway‑grade grease, ready‑for‑installation without on‑site greasing.
Dimensionally interchangeable with old code 197726; precision class P0/P6/P5 optional.
