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HM136948/HM136916XD G7X12/G7X14 Railway train bearings
HM136948/HM136916XD is imperial TDO integral double‑cup double‑row tapered roller bearing from Timken, assembled with two cone assemblies HM136948 and one‑piece double‑cup HM136916XD with stamped‑steel cage. It is AAR‑G class 7×12 railway axle‑box bearing, interchangeable with cartridge bearing BT2‑8609BB / TAROL7×12‑U‑JPAlibaba. The double cup HM136916XD fits three different cones HM136936 / HM136940 / HM136948 with different bore sizes. Back‑to‑back configuration withstands heavy radial plus bidirectional axial loads, widely used for heavy‑haul freight‑car wheelset axle‑boxes, mining, metallurgical rolling‑mill and heavy‑duty gearboxes.
HM136936/HM136916XD d=157.150 mm ‑ HM136940/HM136916XD d=165.087 mm ‑ HM136948/HM136916XD d=177.787 mm
| 项目 Item | 公制 Metric | 英制 Imperial |
|---|---|---|
| 内径 d Bore | 177.787 mm | 6.9995 in |
| 外径 D Outer Diameter | 276.225 mm | 10.8750 in |
| 单内圈宽度 B Cone width | 74.613 mm | 2.9375 in |
| 双外圈总宽 C Double cup width | 185.725 mm | 7.3120 in |
| 装配总宽 T Assembly width | 181.021 mm | 7.1268 in |
| 重量 Weight | 46.20 kg | 101.85 lb |
| 参数 Rating | 公制 Metric | 英制 Imperial |
|---|---|---|
| C1 双列动载荷 (10⁶转) | 1 580 000 N | 355 000 lbf |
| C90 单列动载荷 (9000 万转) | 205 000 N | 46 100 lbf |
| C90 (2) 双列动载荷 (9000 万转) | 357 000 N | 80 200 lbf |
| Ca90 轴向动载荷 (9000 万转) | 79 200 N | 17 800 lbf |
TDO 一体式双外圈背对背双列结构；AAR‑G 级 7×12 铁路轴箱轴承，外圈 HM136916XD 兼容三款不同内径内圈，本型号适配 177.787 mm 轴颈，可替代 BT2‑8609BB 单元轴承。
功率密集内部几何，滚子修形优化，抗冲击抗震动，承受重载径向与双向轴向复合载荷，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，耐受重载冲击；支持发黑、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，铁路工况必须配套外部密封组件。
⚠️HM136936 / HM136940 / HM136948 内圈内径互不相同，严禁交叉混用，必须成套装配。
