H337844/H337816XD GG6-7/8 Railway train bearings

The H337844 / H337816XD is a high-specification imperial-size TDO tapered roller bearing belonging to the premium H337800 series, specially engineered for extreme heavy-haul railway wheel set applications. Differing from standard railway bearings, this unit features a unique non-standard shoulder design, delivering customized structural adaptability for high-load rail vehicle fixed-end mounting. The assembly consists of two independent H337844 inner cones and a one-piece rigid H337816XD double outer cup, paired with a precision-matched internal spacer to achieve ultra-stable integrated operation under harsh dynamic load conditions.

Manufactured with high-grade vacuum-degassed bearing steel and undergoing precise overall heat treatment, this bearing achieves exceptional hardness, structural toughness and anti-fatigue performance. Its optimized roller and raceway contact geometry effectively disperses concentrated stress, greatly resisting severe vibration, alternating impact loads and long-duration continuous high-load operation. Capable of bearing massive radial loads and stable bidirectional axial thrust simultaneously, it solves the structural stability challenges of ultra-heavy railway transportation, ensuring consistent and reliable wheel set operation in complex and variable working environments.

Boasting extra-large dimensional specifications and exclusive structural optimization, this bearing is a dedicated core component for heavy-duty rail transit equipment. Its non-standard shoulder design requires precise matching with mating components, providing targeted and high-reliability support for ultra-heavy haul freight railway vehicles and large-tonnage rail transport systems, with outstanding durability and low failure rate in long-cycle service scenarios.

Complete Technical Parameters

Inner Diameter (d): 174.612 mm

Outer Diameter (D): 301.701 mm

Double Cup Total Width (C): 196.850 mm

Bearing Weight: 56.04 kg

Unique Product Advantages

1. Custom non-standard shoulder structure adapts to special installation requirements of heavy-haul wheel sets, realizing higher assembly fit accuracy than standard bearings;

2. Super-large load capacity and rigid integral double outer cup structure, effectively preventing structural deformation under extreme heavy loads and improving overall wheel set stability;

3. Premium material and precision machining endow excellent vibration resistance and fatigue resistance, suitable for long-term high-intensity railway operation;

4. Professional series customization for ultra-heavy rail transit scenarios, with stable lubrication performance and extended service life under continuous heavy-load working conditions.

Application Scope

Primarily used for fixed-end wheel set bearing systems of ultra-heavy haul railway freight vehicles and large-tonnage rail transport equipment. It is applicable to high-load, high-vibration and long-cycle heavy-duty railway transportation working conditions, serving as a key load-bearing component for high-spec rail vehicle chassis systems.