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 (ฮป)
  • Wheelset geometric parameters and deviation
  • Contact point position relative to wheel center
  • Stability characteristics and steering forces
๐Ÿ‡ง๐Ÿ‡ช NBN EN 13262 ๐Ÿ‡ฉ๐Ÿ‡ช DIN EN 13262 ๐Ÿ‡ฌ๐Ÿ‡ง BS EN 13262 ๐Ÿ‡ซ๐Ÿ‡ท NF EN 13262 ๐Ÿ‡ฎ๐Ÿ‡น UNI EN 13262 ๐Ÿ‡ช๐Ÿ‡ธ UNE EN 13262 ๐Ÿ‡ณ๐Ÿ‡ฑ NEN EN 13262
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COFRAC 1-6209 Poitiers, FR
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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 โ€” Running gear โ€” Wheels and wheelsets โ€” Part 2: Definitions and gauges
  • EN 13262 Railway applications โ€” Wheelsets and bogies โ€” Safety requirements for wheels
  • UIC 644 Railway โ€” behaviour of coach bogies โ€” Y25 bogie type

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