Previous
Next
H337846/H337816XD GG7 Railway train bearings
The H337846 / H337816XD is a high-capacity inch-series TDO tapered roller bearing engineered for extreme heavy-haul railway wheel set fixed-end applications. Belonging to the premium H337800 series, this bearing assembly adopts a mature two-cone and single integral double-cup structure, composed of two independent H337846 inner cones and one robust H337816XD one-piece outer cup. Equipped with a precision internal spacer, it delivers precise axial positioning and outstanding structural rigidity, specially optimized for large-tonnage rail vehicles that endure continuous heavy radial and alternating axial loads.
Produced from ultra-pure vacuum-degassed AISI 52100 bearing steel and processed through strict quenching and tempering treatment, this bearing achieves superior surface hardness, core toughness and exceptional anti-fatigue performance. Its finely optimized roller-to-raceway contact profile minimizes stress concentration and friction loss, enabling stable operation under intense vibration, frequent impact loads and long-duration continuous running. With ultra-high comprehensive load capacity, it effectively copes with the complex and harsh working conditions of heavy-haul railway lines, maintaining stable wheel set rotation accuracy and long-term operational reliability.
Featuring enlarged bore size and upgraded load rating compared with conventional railway bearings of the same series, this model is a high-performance core component for modern heavy-duty rail transit equipment. It adopts a reliable open-type structure and standard high-precision manufacturing tolerance, compatible with professional railway lubrication and maintenance systems. Designed for ultra-heavy freight transportation scenarios, it provides stable, durable and low-failure load-bearing support for large-capacity rail vehicle wheel set systems.
Complete Technical Parameters
Inner Diameter (d): 177.787 mm
Outer Diameter (D): 301.701 mm
Assembled Total Width (T): 190.543 mm
Double Cup Total Width (C): 196.850 mm
Inner Cone Width (B): 87.313 mm
Bearing Weight: 56.80 kg
Product Core Strengths
1. Industry-leading ultra-large dynamic load capacity, perfectly adapted to ultra-heavy haul railway high-tonnage transportation demands, far exceeding the load limit of ordinary railway bearings;
2. Integrated one-piece double outer cup structure enhances overall structural integrity, effectively resists deformation and vibration under extreme loads, ensuring wheel set running stability;
3. High-purity bearing steel and precision grinding process greatly improve wear resistance and contact fatigue life, reducing long-term operation failure risks;
4. Optimized internal geometric design lowers operating friction and temperature rise, adapting to long-cycle and high-frequency continuous railway operation.
Application Coverage
Specially applied to fixed-end wheel set bearing systems for super heavy-duty railway freight wagons and large-tonnage rail transport vehicles. It is widely used in high-load, high-vibration and long-service-cycle heavy-haul rail transit scenarios, serving as a critical safety load-bearing component for high-grade railway vehicle chassis systems.
