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BT2-8690BB Railway Tapered Roller Bearings
BT2-8690BB Railway Tapered Roller Bearings
Basic Dimensions & Load Ratings
Parameter | Value |
Bore d (mm) | 130 |
Outer Diameter D (mm) | 230 |
Width B (mm) | 160 |
Basic Dynamic Load Cr (kN) | |
Basic Static Load Cor (kN) | |
Weight (kg) |
Note: Standard catalogue dimensions and load data are not publicly available. Please refer to OEM drawings or factory test reports for exact technical parameters.
Product Introduction
BT2-8690BB is a heavy-duty pre-assembled sealed double-row tapered roller bearing unit designed exclusively for railway wheel set axle box systems, complying with strict EN12080 railway industry standards. Manufactured from high-purity vacuum-degassed carburized bearing steel with P5 high-precision machining and standardized heat treatment, this bearing delivers exceptional structural rigidity, outstanding wear resistance and long contact fatigue life for continuous heavy railway operation.
This integrated bearing unit is engineered to sustain heavy combined radial loads and stable bidirectional axial thrust loads. It effectively copes with complex operating conditions including track vibration, impact loads, vehicle curve negotiation and frequent variable-speed operation. Adopting optimized logarithmic roller crowning structure, it eliminates edge stress concentration, improves overall shock resistance and ensures stable running accuracy under harsh and alternating load environments.
Equipped with a high-efficiency multi-lip integrated sealing system, the bearing provides reliable protection against dust, sand, moisture and other external contaminants, preventing grease leakage and internal corrosion. The pre-assembled cartridge structure simplifies installation, inspection and daily overhaul procedures, greatly reducing vehicle maintenance downtime and operational costs for railway transit systems.
Key Features
Sealed double-row tapered roller structure, supports heavy composite radial and bidirectional axial loads
High-purity carburized steel material, superior rigidity and long fatigue service life
Optimized roller crowning design, excellent shock resistance and anti-vibration performance
Integrated multi-lip sealing system, reliable dustproof, waterproof and anti-pollution capacity
Pre-assembled unit structure, easy installation and low maintenance requirements
Manufactured in accordance with EN12080 railway standards, high safety and operational stability
Application
Mainly applied in axle box wheel set supporting assemblies for railway freight wagons, passenger coaches, locomotives and urban rail transit vehicles. It serves as the core load-bearing component of bogie systems, adapting to long-distance, high-speed and heavy-cycle railway transportation working conditions.
