353130B CTBU150X250X160 Railway train bearings
353130B (also known as CTBU150), compact cartridge double‑row tapered roller bearing for Chinese 25‑ton axle‑load freight wagons, designed for RE2B shortened journal axle, complying with GB/T 25770‑2024. Suffix B stands for compact construction, without external seal seat. Glass‑fiber reinforced plastic‑steel cage, built‑in LL low‑friction composite oil seal. Factory pre‑filled with railway grade No.4 grease, maintenance‑free cartridge unit. It bears heavy radial load and bidirectional axial loads, max operating speed 120 km/h, widely used on K5 / K6 bogies.
| 项目 Item | 公制 Metric |
|---|---|
| 内径 d Bore | 150 mm |
| 外径 D Outer Diameter | 250 mm |
| 外圈宽度 C | 160 mm |
| 装配总高 T（安装高度） | 180.6 mm |
| 重量 Weight | 35.6 kg |
| 参数 Rating | 公制 Metric |
|---|---|
| Cr 动态额定载荷 | 968 000 N（968 kN） |
| Cor 静态额定载荷 | 1 800 000 N（1800 kN） |
| 自由轴向游隙 Ga | 0.60～0.70 mm |
| 设计寿命 L10s | ≥2 000 000 km |
Compact design without separate seal seat, matches RE2B shortened journal, reduces axle deflection and fretting corrosion.
Glass‑fiber reinforced plastic‑steel cage, low operating temperature, pocket design for visual inspection.
LL composite double‑lip oil seal with low friction torque, prevents dust ingress and grease leakage.
Built‑in plastic‑steel spacer eliminates fretting wear between cone and back‑stop.
ESR G20CrNi2MoA carburized steel, logarithmic crowned roller profile, factory pre‑greased for direct press‑fit mounting
