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H337846/H337816XD GG7 Railway train bearings
H337846/H337816XD is imperial TDO integral double‑cup double‑row tapered roller bearing from Boyuan, two cone assemblies H337846 plus one‑piece double‑cup H337816XD with stamped‑steel cage, AAR‑GG heavy‑haul railway axle‑box bearing. It shares the same double cup H337816XD with H337844/H337816XD, only cone bore increased to 177.787 mm for larger journal axles. Back‑to‑back design withstands extra‑heavy radial and bidirectional axial loads, widely used for heavy‑haul freight wheelset axle‑boxes, heavy metallurgical‑mining equipment and large heavy‑duty gearboxes.
| 项目 Item | 公制 Metric | 英制 Imperial |
|---|---|---|
| 内径 d Bore | 177.787 mm | 7.0000 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 | 53.20 kg | 117.28 lb |
| 参数 Rating | 公制 Metric | 英制 Imperial |
|---|---|---|
| C1 双列动载荷 (10⁶转) | 1 680 000 N | 378 000 lbf |
| C90 单列动载荷 (9000 万转) | 250 000 N | 56 200 lbf |
| C90 (2) 双列动载荷 (9000 万转) | 434 000 N | 97 600 lbf |
| Ca90 轴向动载荷 (9000 万转) | 127 000 N | 28 600 lbf |
TDO one‑piece double‑cup back‑to‑back double‑row construction, AAR‑GG extra‑heavy‑haul railway bearing. Same double‑cup as H337844, larger cone bore for 177.787 mm journal.
Large roller cross‑section for extreme load‑capacity, excellent shock‑vibration resistance, withstands heavy radial plus bidirectional axial combined loads.
Power‑dense internal geometry improves fatigue life; optimized roller‑raceway contact reduces friction & operating temperature, extends grease service interval.
Stamped‑steel cage for heavy‑shock resistance; black‑oxide / phosphating treatment optional.
Precision grades P0/P6/P5 available; clearance C0/C2/C3/C4 optional; open‑type, external sealing unit required for railway service.
⚠️Never cross‑mix H337844 and H337846 cones, bore sizes differ; use matched‑set only.
