H337840/H337816XD GG6X1/2 Railway train bearings

H337840 / H337816XD Product Introduction

The H337840 / H337816XD is a high-performance imperial TDO tapered roller bearing tailored for rigorous heavy-haul railway wheel set fixed-end installations. As a specialized member of the H337800 series, this bearing unit adopts a classic double-cone single double-cup layout, consisting of two matched H337840 inner cones and one rigid integrated H337816XD outer cup. Fitted with a precision-calibrated internal spacer, it delivers consistent axial clearance and robust structural rigidity, perfectly adapting to the complex combined load conditions of large-tonnage rail vehicles under long-term continuous operation.

Distinguished by its professional non-standard shoulder structure, this bearing requires precise matching with adjacent mechanical components, effectively optimizing contact stress distribution between rollers and raceways. Manufactured from high-purity vacuum-degassed bearing steel and processed with rigorous heat treatment and ultra-precision grinding, it features outstanding surface hardness, excellent impact resistance and superior contact fatigue durability. The refined internal geometric design drastically lowers friction torque and heat accumulation, enabling stable and reliable operation under extreme working conditions including frequent load impact, intense vibration and long-cycle high-load railway transportation.

Boasting ultra-large outer diameter and industry-top load capacity, this bearing stands out among heavy-duty railway bearing products. It maintains excellent structural stability and low wear characteristics under ultra-heavy radial and bidirectional axial loads, with reliable adaptability to harsh heavy-haul line environments. It serves as a core safety load-bearing component for modern high-capacity rail transit equipment, effectively extending wheel set service cycle and reducing overall equipment maintenance costs.

Complete Technical Parameters

Inner Diameter (d): 177.787 mm

Outer Diameter (D): 301.701 mm

Double Cup Total Width (C): 196.850 mm

Bearing Weight: 44.10 kg

1. Custom non-standard shoulder structure realizes higher assembly fitting accuracy, avoiding positional deviation during wheel set operation and improving overall running stability;

2. Extreme high load-bearing performance meets the operation requirements of ultra-heavy haul railways, providing stable and durable load support for large-tonnage rail vehicles;

3. Optimized internal contact structure disperses dynamic stress efficiently, resisting long-term vibration and impact fatigue, with excellent long-duration operational reliability;

4. Lightweight structural optimization compared with similar high-load bearings reduces wheel set overall weight while ensuring rigidity, improving vehicle operating economy.

Application Scenarios

Exclusively designed for fixed-end wheel set bearing systems of ultra-heavy haul railway freight wagons. It is widely applicable to high-load, high-vibration and long-service-cycle heavy-haul rail transit scenarios, and can also be matched with large-scale special railway engineering equipment to provide high-reliability chassis load-bearing guarantee.