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H337844/H337816XD GG6-7/8 Railway train bearings
H337844/H337816XD is imperial TDO integral double‑cup double‑row tapered roller bearing from Boyuan, assembled with two cone assemblies H337844 and one one‑piece double cup H337816XD with stamped‑steel cage. It is AAR‑GG class heavy‑haul railway axle‑box bearing for high‑tonnage freight wagons. Back‑to‑back configuration withstands extra heavy radial load plus bidirectional axial loads. Widely used for heavy‑haul railway wheelset axle‑boxes, heavy metallurgical & mining machinery, large heavy‑duty gearboxes and travel unitsTimken.
| 项目 Item | 公制 Metric | 英制 Imperial |
|---|---|---|
| 内径 d Bore | 174.612 mm | 6.8745 in |
| 外径 D Outer Diameter | 301.701 mm | 11.8780 in |
| 单内圈宽度 B Cone width | 87.313 mm | 3.4375 in |
| 双外圈总宽 C Double cup width | 196.850 mm | 7.7500 in |
| 装配总宽 T Assembly width | 190.543 mm | 7.5017 in |
| 重量 Weight | 54.14 kg | 119.35 lb |
| 参数 Rating | 公制 Metric | 英制 Imperial |
|---|---|---|
| C1 双列动载荷 (10⁶转) | 1 750 000 N | 394 000 lbf |
| C90 单列动载荷 (9000 万转) | 261 000 N | 58 700 lbf |
| C90 (2) 双列动载荷 (9000 万转) | 454 000 N | 102 000 lbf |
| Ca90 轴向动载荷 (9000 万转) | 132 000 N | 29 700 lbf |
DO one‑piece double‑cup back‑to‑back double‑row construction, AAR‑GG high‑tonnage heavy‑haul railway bearing, much higher load capacity than Class‑F, excellent shock resistance, withstands extra‑heavy radial and bidirectional axial loads for heavy‑haul freight rolling stock.
Power‑dense internal geometry with large roller cross‑section delivers extreme load‑capacity and extended fatigue service life.
Optimized roller‑raceway contact reduces friction and operating temperature, extends grease service interval.
Stamped‑steel cage for heavy shock & vibration resistance; 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.
Same double cup fits H337844 and H337846 cones. Two cones must be used as matched set, cross‑mix forbidden.
