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HM124646/ HM124618XD BT2-8735BB TAROL5X9 Railway train bearings
HM124646/HM124618XD is imperial TDO integral double‑cup double‑row tapered roller bearing from Boyuan, assembled with two cone assemblies HM124646 and one one‑piece double cup HM124618XD with stamped‑steel cage. It is AAR Class‑C 5×9 railway axle‑box bearing, interchangeable with BT2‑8545AD cartridge bearingThe Timken.... Back‑to‑back configuration withstands heavy radial load plus bidirectional axial loads, widely used for freight wagon wheelset axle‑boxes, mining machinery, metallurgical rolling‑mill equipment and heavy‑duty gearboxes.
| 项目 Item | 公制 Metric | 英制 Imperial |
|---|---|---|
| 内径 d Bore | 119.062 mm | 4.6875 in |
| 外径 D Outer Diameter | 195.263 mm | 7.6875 in |
| 单内圈宽度 B Cone width | 57.150 mm | 2.2500 in |
| 双外圈总宽 C Double cup width | 142.875 mm | 5.6250 in |
| 装配总宽 T Assembly width | 136.779 mm | 5.3850 in |
| 重量 Weight | 15.20 kg | 33.52 lbTimken |
| 参数 Rating | 公制 Metric | 英制 Imperial |
|---|---|---|
| C1 双列动载荷 (10⁶转) | 662 000 N | 149 000 lbf |
| C90 单列动载荷 (9000 万转) | 98 600 N | 22 200 lbf |
| C90 (2) 双列动载荷 (9000 万转) | 172 000 N | 38 700 lbf |
| Ca90 轴向动载荷 (9000 万转) | 44 600 N | 10 000 lbf |
TDO 一体式双外圈背对背双列结构，抗冲击，同时承受径向 + 双向轴向重载；AAR‑C 级 5×9 铁路货车轴箱轴承，可替代 BT2‑8545AD 单元轴承The Timken...。
功率密集内部几何，紧凑外形实现高承载，提升疲劳寿命。
优化滚子‑滚道接触，降低摩擦与运转温升，延长润滑脂服役周期。
冲压钢保持架，抗震动冲击；可做发黑、磷化表面处理。
精度 P0/P6/P5 可选；游隙 C0/C2/C3/C4 可选；开式结构，铁路工况需配套外部密封组件。
