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
🇧🇪 NBN EN 13262 🇩🇪 DIN EN 13262 🇬🇧 BS EN 13262 🇫🇷 NF EN 13262 🇮🇹 UNI EN 13262 🇪🇸 UNE EN 13262 🇳🇱 NEN EN 13262
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COFRAC 1-5950 Vannes, FR
NF X 43-050 ISO 16000-7 FD T 90-522 FD X 46-033
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AB DIAG EXPERT

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COFRAC 1-6467 Limoges, FR
NF X 43-050 NF X 43-269 ISO 16000-7 FD X 46-033
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AC Environnement

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COFRAC 1-6001 Riorges, FR
DIN ISO 16000-4 DIN EN ISO 16017-2 NF X 43-262 NF X 43-257 NF X 43-267 + 3 more
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ACEPE

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COFRAC 1-6133 Cherbourg-En-Cotentin, FR
NF X 43-050 NF X 43-269 NF ISO 22262-1 (parties utiles NF X 43-269 – ISO 16000-7 + 1 more
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ACM PHARMA

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COFRAC 1-7464 Bellegarde, FR
DIN EN ISO 16212 DIN EN ISO 18416 DIN EN ISO 21149 DIN EN ISO 11930 DIN EN ISO 11737-2 + 3 more
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ACONEX

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COFRAC 1-6332 Mont-Saint-Aignan, FR
NF X 43-050 NF X 43-269 ISO 16000-7 FD X 46-033
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ACTALIA SENSORIEL - BOURG-EN-BRESSE

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COFRAC 1-5574 Bourg-En-Bresse, FR
ISO 13299 ISO 4120 NF V 09-500
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ACTINIUM

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COFRAC 1-6347 Sevres-Anxaumont, FR
NF X 43-262 NF X 43-257 NF X 43-298 NF X 43-267 NF X 43-269 + 3 more
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AD-LAB - Brussieu

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COFRAC 1-5606 Brussieu, FR
DIN 51750-3 DIN EN 15002 ISO 22262-1 NF X 43-050 NF X 43-269 + 3 more
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ADC

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COFRAC 1-6862 Mont-De-Marsan, FR
NF X 43-050 NF X 43-269 ISO 16000-7 FD X 46-033
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ADOUR BIO CONSEIL - A.BIO.C.

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COFRAC 1-0905 Arzacq-Arraziguet, FR
ISO 15214 DIN ISO 16649-2 DIN EN ISO 6579-1 DIN EN ISO 6888-2 DIN EN ISO 6888-3 + 3 more
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ADRIA

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COFRAC 1-0144 Quimper Cedex, FR
ISO 4832 ISO 15214 ISO 21527-1 ISO 21527-2 DIN ISO 16649-2 + 3 more
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ADX Groupe

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COFRAC 1-6048 Chateau-Gontier, FR
NF X 43-050 NF X 43-269 ISO 16000-7 FD X 46-033
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AGENCE POUR LE BON DEVELOPPEMENT DE L'ENVIRONNEMENT

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COFRAC 1-6342 Marseille, FR
NF X 43-050 NF X 43-269 ISO 16000-7 FD X 46-033
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AGEXIAL - Unité de BALZAC

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COFRAC 1-7407 Balzac, FR
NF X 43-050 NF X 43-269 ISO 16000-7 FD X 46-033
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AGEXIAL - Unité de Villeneuve Loubet

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COFRAC 1-7059 Villeuneuve Loubet, FR
NF X 43-050 NF X 43-269 ISO 16000-7 FD X 46-033
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AIR CONTROLE

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COFRAC 1-6250 Decize, FR
NF X 43-050 NF X 43-269 ISO 16000-7 FD X 46-033
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AIRALYZ

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COFRAC 1-6339 Croissy-Sur-Seine, FR
NF X 43-050 NF X 43-269 ISO 16000-7 FD X 46-033
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AIRMETRIE - Agence Nord

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COFRAC 1-1617 Dechy, FR
DIN EN 13126-19 ISO 10780 DIN EN ISO 16911-1 DIN EN 13284-1 DIN EN 14790 + 3 more
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AIRTHEMIS SUD EST

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COFRAC 1-7447 Venelles, FR
ISO NF X 43-257 NF X 43-050 NF X 43-269 ISO 16000-7 + 1 more
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ALDARIM

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COFRAC 1-6043 Sainte Helene Du Lac, FR
NF X 43-050 NF X 43-269 NF X43-050 (parties utiles de ISO 16000-7 FD X 46-033
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ALFADIR - ARIA

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COFRAC 1-6425 Bagnols Sur Ceze, FR
NF X 43-257 NF X 43-050 NF X 43-269 ISO 16000-7 FD X 46-033
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ALIANIS

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COFRAC 1-6842 Beynes, FR
NF X 43-050 NF X 43-269 ISO 16000-7 FD X 46-033
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ALS

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COFRAC 1-5853 Saint-Pierre-De-Chandieu, FR
ISO 22262-1 NF X 43-257 NF X 43-050 NF X 43-269 NF X43-050 (parties utiles de + 2 more
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ALS France

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COFRAC 1-1364 Saint-Quentin-Fallavier, FR
DIN EN 27888 DIN ISO 16000-3 DIN ISO 16000-6 DIN EN ISO 16000-9 DIN EN ISO 11885 + 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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