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
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COFRAC 1-0002 Elancourt, FR
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COFRAC 1-7433 Saint-Julien-Les-Metz, FR
DIN EN 14385 ETSI EN 301 489-1 V2.2.3 2019-11 NF X43-551 IS EN 1948-1:2006 2006 DIN EN 14789 + 3 more
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GRAND EST ANALYSES

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COFRAC 1-6977 Wintzenheim, FR
NF X 43-269 – Annexe K NF X 43-050 NF X43-050 (parties utiles de la
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COFRAC 1-6221 Strasbourg, FR
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COFRAC 1-6209 Poitiers, FR
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COFRAC 1-0847 Foulayronnes, FR
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COFRAC 1-6747 Atton, FR
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COFRAC 1-6558 Bron, FR
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COFRAC 1-6559 Aix-En-Provence, FR
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INSTITUT MECASEM

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(BS EN ISO 6892-1: 2019) ASTM E8/E 8M DIN EN 10002-1 ASTM E8 et E8M DIN EN 2002-001 + 3 more
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INTERTEK FRANCE

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COFRAC 1-7401 Heudebouville, FR
DIN EN 12469 NF S 90-351 BS EN ISO 14644-1:2015 ISO 14644-3
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INTERTEK France

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COFRAC 1-1296 Heudebouville, FR
DIN EN ISO 1833-6 DIN EN ISO 1833-2 DIN EN ISO 1833-7 DIN EN ISO 1833-1 DIN EN ISO 1833-20 + 3 more
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ITGA NORMANDIE

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COFRAC 1-6304 Petit Couronne, FR
NF X43-050 (parties utiles de ISO 22262-1 NF X 43-050 NF X 43-269 - Annexe K
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Institut Technique des Gaz et de l'Air - ITGA - Site St Grégoire K

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COFRAC 1-5970 Saint-Gregoire, FR
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COFRAC 1-1029 Meyreuil, FR
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COFRAC 1-5968 Merignac, 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 — 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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