Kingrail forged locomotive wheelsets — including their wheels, axles, bearings, as well as the strength characteristics and technical keys required for manufacturing and performance:

A locomotive wheelset is a critical assembly made up of two wheels mounted on a solid forged axle, with bearings fitted at both ends. This structure supports the locomotive’s weight, transmits tractive and braking forces, and guides the train along the rails. Forged wheelsets offer the highest level of durability and strength, making them essential for high-speed and heavy-haul locomotives

Key Components:

1. Forged Wheels:

   • Material: Typically forged from steel grades such as ER7/ER8 (EN13262) or AAR Class C.

   • Diameter: Often ranges from 840 mm to 1250 mm (varies by locomotive class).

   • Features: Heat-treated for rim hardness (240–270 HB), with precise tread and flange profile.

2. Forged Axle:

   • Material: 42CrMo, 40CrNiMoA, or similar high-toughness steels.

   • Manufacture: Hot forging followed by rough and finish machining.

   • Hardness & Strength:

     • Tensile strength: ≥ 800 MPa

     • Yield strength: ≥ 600 MPa

     • Impact resistance: > 40 J at -20°C

3. Bearings:

   • Type: Cylindrical or tapered roller bearings (Class F or G), with housing and seals.

   • Functions: Reduce rolling friction, support axial and radial loads, allow for higher speeds.

   • Features: Lubricated and sealed; monitored for temperature and vibration in modern locomotives.

   • Compliance Standards:

     • EN 13260 / EN 13261 / EN 13262 (Europe)

     • AAR M-101 / M-107 / M-208 (North America)

     • TB/T 2817 (China)

     • Applications:

       • Heavy-duty freight locomotives

       • Passenger locomotives (diesel & electric)

       • High-speed rail and urban transit traction units

       • Exported locomotive platforms (Africa, South America, Southeast Asia)