UIC 519

Railway Wheelset Equivalent Conicity Determination

This test method specifies procedures for determining the equivalent conicity of railway wheelsets, a critical parameter governing vehicle stability and steering behavior on curves. Conicity describes the geometric relationship between wheel profiles and rail geometry, affecting how vehicles negotiate curves and respond to track irregularities. The measurement is essential for wheelset manufacturers, vehicle designers, and track maintenance specialists to ensure stable, safe operation and minimize wear and derailment risk. Accredited testing provides objective verification that wheelsets meet design specifications and regulatory requirements for dynamic safety.

What it measures

  • Wheel profile geometry and taper angles
  • Equivalent conicity value (λ)
  • Wheelset geometric parameters and deviation
  • Contact point position relative to wheel center
  • Stability characteristics and steering forces
🇩🇪 DIN EN 13262 🇬🇧 BS EN 13262 🇫🇷 NF EN 13262 🇮🇹 UNI EN 13262 🇪🇸 UNE EN 13262 🇳🇱 NEN EN 13262
1,632 Accredited labs
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UNIMETRIK

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ENAC LC10.082 Legutiano, ES
CEM DI-007 CEM DI-021 CEM DI-004 CEM DI-018 CEM DI-002 + 3 more
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UNIVERSITAT DE GIRONA

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ENAC LE2485 Girona, ES
UNE-EN 25663 UNE-EN 872 UNE-EN ISO 6878 UNE EN 27888 UNE-EN ISO 10523 + 3 more
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URIKER

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ENAC LE775 Zamudio, ES
UNE 77061 SM 4500-NO-3 E UNE-EN ISO 7027-1 ISO 15923-1 UNE-EN ISO 7393-2 + 3 more
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UTILES Y MAQUINAS INDUSTRIALES, S.A. (UMI)

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ENAC LC10.024 Zamudio, ES
UNE-EN ISO 16859-2 (Método indirecto) UNE-EN ISO 6507-2 ASTM E 92 UNE-EN ISO 6508-2 (Método indirecto) UNE-EN ISO 6506-2 (Método indirecto) + 3 more
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VERIFICACIÓN Y CALIBRACIÓN

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ENAC LC10.251 Hospitalet de Llobregat, ES
CEM ME009
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VIRLAB

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ENAC LE131 Asteasu, ES
IEC 60068-2-6 UNE-EN 60068-2-6 UNE-EN 60068-2-27 IEC 60068-2-27 UNE-EN 60068-2-57 + 3 more
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Industries

Wheelset and bogie manufacturing Rolling stock design and engineering Track maintenance and infrastructure management Vehicle certification and type approval Railway research and development

Related Standards

  • UIC 510-2 Railway vehicles — Running gear — Wheels and wheelsets — Part 2: Definitions and gauges
  • EN 13262 Railway applications — Wheelsets and bogies — Safety requirements for wheels
  • UIC 644 Railway — behaviour of coach bogies — Y25 bogie type

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