The AAR Standard Railway Wheelset is a robust and highly engineered component specifically designed to meet the rigorous performance and safety standards of North American freight and passenger rail applications. Manufactured in full compliance with AAR M-107/M-208 (for wheels) and AAR M-101 (for axles), this wheelset ensures reliable long-term operation under high axle loads and continuous service conditions.
Manufacturing and Materials
Wheel Material: Forged steel, Class B, heat-treated for wear resistance and toughness
Axle Material: AAR Grade F or custom alloyed steel for enhanced fatigue performance
Heat Treatment: Precision-controlled quenching and tempering ensures uniform hardness and internal integrity
Machining: All components are CNC machined to tight tolerances, ensuring perfect press-fit assembly and long-term mechanical stability
Mechanical & Chemical Properties
Wheel Hardness: Brinell 321–363 HB
Axle Tensile Strength: ≥ 610 MPa | Elongation ≥ 22%
Certified Material Composition: All critical alloying elements (C, Mn, Si, Cr, Ni, Cu, etc.) conform to AAR’s chemical standards and are verified through spectral analysis
Testing Protocols:
Ultrasonic (UT) and Magnetic Particle Testing (MPI)
Dimensional and Surface Inspections
Axle and bore crack detection
Heat number traceability and lot certification
Standard Specifications
Wheel Diameter: Standard 920 mm (or as per customer specification)
Gauge Compatibility: 1435 mm standard gauge (other gauges available on request)
Load Rating: Supports axle loads up to 30 tons
Mounting Type: Interference fit or bolted assembly depending on application
Applications
This wheelset is ideal for:
Freight wagons
Heavy haul locomotives
Passenger railcars
Metro/subway and commuter trains
Track maintenance vehicles
Customization & Services
We offer full OEM and ODM customization options, including:
Custom logo or part number stamping
Specific axle or bore configurations
Tailored coatings, finishes, and corrosion protection
Packaging and delivery per client logistics requirements
Quality and Compliance
Certified under ISO 9001:2015, ISO 14001, and OHSAS 18001
Full documentation and inspection reports provided with every shipment
Export-ready: compliant with international rail standards (AAR, UIC, EN, GOST)
