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HM129848/ HM129814XD BT2-8516BB TAROL6x11 Railway train bearings
HM129848/HM129814XD is imperial TDO integral double‑cup double‑row tapered roller bearing from Boyuan, assembled with two cone assemblies HM129848 and one one‑piece double cup HM129814XD, stamped‑steel cage. It is AAR Class‑E 6×11 railway axle‑box bearing, interchangeable with BT2‑8516BB railway cartridge bearing. Back‑to‑back arrangement supports heavy radial load plus bidirectional axial loads, widely used for heavy‑haul freight car wheelset axle‑boxes, heavy mining equipment, large gear reducers and rolling‑mill machinery.
| 项目 Item | 公制 Metric | 英制 Imperial |
|---|---|---|
| 内径 d Bore | 144.450 mm | 5.6870 inTimken |
| 外径 D Outer Diameter | 220.663 mm | 8.6875 inTimken |
| 单内圈宽度 B Cone width | 76.200 mm | 3.0000 in |
| 双外圈总宽 C Double cup width | 163.510 mm | 6.4374 inTimken |
| 装配总宽 T Assembly width | 155.839 mm | 6.1354 inTimken |
| 重量 Weight | 20.38 kg | 44.92 lbTimken |
| 参数 Rating | 公制 Metric | 英制 Imperial |
|---|---|---|
| C1 双列动载荷 (10⁶转) | 766 000 N | 172 000 lbfTimken |
| C90 单列动载荷 (9000 万转) | 114 000 N | 25 600 lbfTimken |
| C90 (2) 双列动载荷 (9000 万转) | 199 000 N | 44 600 lbfTimken |
| Ca90 轴向动载荷 (9000 万转) | 50 600 N | 11 400 lbf |
TDO one‑piece double‑cup back‑to‑back double‑row construction, good shock resistance, bears heavy radial and bidirectional axial loads; AAR Class‑E 6×11 main axle‑box bearing for freight wagons.
Power‑dense internal geometry delivers high load capacity within compact envelope, improves fatigue service life.
Optimized roller‑raceway contact reduces friction and operating temperature, extends grease service interval.
Stamped‑steel cage for anti‑shock & anti‑vibration; black‑oxide / phosphating surface treatment optional.
Precision grades P0/P6/P5 available; clearance C0/C2/C3/C4 optional; open‑type, external sealing unit required for railway service.
