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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19 Countries

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DPA Analyses pour le Bâtiment Toulouse

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COFRAC 1-10029 Colomiers, FR
NF X 43-050 NF X43-050 (parties
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COFRAC 1-10041 Villebon-Sur-Yvette, FR
NF X 46-032 NF X 43-050 NF X43-050 (parties
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EGIS INDUSTRIE ET PROCESS

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COFRAC 1-6388 Saint-Martin D'Heres, FR
DIN EN 12469 NF S 90-351 BS EN ISO 14644-1:2015 ISO 14644-3
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EICHROM AMIANTE

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COFRAC 1-6491 Bruz, FR
NF X 43-269 - Annexe K NF X 43-050 (parties utiles NF X 46-032 NF X 43-269 – Annexe K NF X 43-050 + 1 more
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EOLIA

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COFRAC 1-2416 La Ciotat, FR
DIN EN 12469 NF S 90-351 NF X 44-201 (Octobre 1984) pour PSM BS EN ISO 14644-1:2015 ISO 14644-3
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EUFOFINS LABORATOIRE DE MICROBIOLOGIE EST

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COFRAC 1-1147 Sainte-Croix-En-Plaine, FR
DIN EN ISO 6888-1 0.95) based on BS ISO 21527-2:2008 DIN EN ISO 6888-2 DIN ISO 16649-2 DIN EN ISO 19020 + 3 more
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EUROFINS ANALYSES POUR LE BATIMENT ILE DE FRANCE

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COFRAC 1-1592 Bagneux, FR
NF X 43-269 NF X 43-050 NF X43-050 (parties utiles de la NF X 46-032 NF X46-031
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EUROFINS ANALYSES POUR LE BATIMENT NORD

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COFRAC 1-1593 Henin-Beaumont, FR
NF X 43-269 – Annexe K NF X 43-050 NF X43-050 (parties utiles de la
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EUROFINS ANALYSES POUR LE BATIMENT OUEST

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COFRAC 1-5597 Nantes Cedex 03, FR
NF X43-050 (parties utiles de NF X 43-050 NF X 43-269 - Annexe K NF EN 14346 – NF X43-050 (parties utiles de la
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EUROFINS ANALYSES POUR LE BATIMENT SUD

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COFRAC 1-5922 Vergeze, FR
NF X 43-269 – Annexe K NF X 43-050 NF X 43-269 - Annexe K NF X43-050 (parties utiles de la
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EUROFINS ANALYSES POUR LE BATIMENT SUD-EST

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COFRAC 1-1591 Saint Etienne, FR
NF X 43-269 - Annexe K NF X 43-269 – Annexe K NF X 43-050 NF X43-050 (parties utiles de la NF X43-050 (parties + 1 more
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EUROFINS ANALYSES POUR LE BATIMENT SUD-OUEST

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COFRAC 1-5840 Gradignan, FR
NF X 43-269 - Annexe K NF X 43-269 – Annexe K NF X 43-050 NF X43-050 (parties utiles de la NF ISO 21363
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EUROFINS HYDROLOGIE NORD

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COFRAC 1-2202 Douai, FR
NF T90-111 DIN EN ISO 14403-2 NF T 90-412 DIN EN ISO 7899-1 NF-T 90-029 + 3 more
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EUROFINS LABORATOIRE CENTRE

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COFRAC 1-2243 Vennecy, FR
DIN EN ISO 21528-2 DIN EN ISO 6888-1 0.95) based on BS ISO 21527-2:2008 DIN EN ISO 6888-2 DIN ISO 16649-2 + 3 more
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EUROFINS LABORATOIRE DE MICROBIOLOGIE SUD

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COFRAC 1-6881 Les Milles, FR
DIN ISO 11665-4 DIN EN ISO 7932 DIN 53483-2 DIN EN ISO 15213-2 NF V08-050 + 3 more
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EUROFINS LABORATOIRE NORD

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COFRAC 1-2241 Douai Cedex, FR
DIN EN ISO 6888-1 DIN EN ISO 21528-2 DIN EN ISO 6888-2 DIN ISO 16649-2 NF V08-054 + 3 more
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EUROFINS LABORATOIRES DE MICROBIOLOGIE OUEST

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COFRAC 1-1830 Nantes, FR
DIN EN ISO 21528-1 NF V08-401 DIN ISO 16649-1 DIN EN ISO 6888-1 DIN EN ISO 21528-2 + 3 more
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EUROFINS PRELEVEMENT POUR LE BATIMENT OUEST

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COFRAC 1-5943 Nantes, FR
NF X 43-269 NF X 43-050 ISO ISO 16000-7
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EVALUATIONS CONSEILS ETUDES POUR L'ENVIRONNEMENT

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COFRAC 1-7268 Seichamps, FR
DIN ISO 17289 NF T 90-260 NF X 31-615 (Uniquement DIN EN ISO 10523 DIN EN 27888
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FCBA - Bordeaux

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COFRAC 1-0201 Bordeaux, FR
DIN EN 947 ISO 24339 DIN CEN TS 15119-2 DIN EN ISO 3741 NF P 20-501 + 3 more
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FIBRECOUNT France

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COFRAC 1-6017 Marseille, FR
DIN 51750-3 NF X 43-269 – NF X 43-050 NF X43-050 (parties utiles de la DIN EN 15002
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FLANDRES Analyses

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COFRAC 1-1185 Capelle-La-Grande, FR
NF T90-111 DIN EN ISO 17294-2 DIN EN ISO 14403-2 NF EN ISO 19340 DIN EN ISO 10304-1 + 3 more
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FLASHLAB - Site d'Illkirch

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COFRAC 1-5765 Illkirch-Graffenstaden, FR
NF X 43-269 NF X 43-050 NF X43-050 (parties utiles de
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COFRAC 1-5952 Longjumeau, FR
DIN EN 13001-1 NF X 43-269 NF X43-050 (parties utiles de NF X 43-275 NF X 43-257 + 3 more
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FLASHLAB NORD

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COFRAC 1-6979 Lezennes, FR
NF X 43-050 NF X 43-050 (parties utiles NF X 43-269 - Annexe
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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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