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

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COFRAC 1-1364 Saint-Quentin-Fallavier, FR
DIN EN 14902 DIN ISO 16000-3 DIN EN ISO 16017-1 DIN EN ISO 16017-2 DIN ISO 16000-4 + 3 more
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ALS France – Site de Paris

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COFRAC 1-5578 Villebon-Sur-Yvette, FR
NF T 90-412 0.95) based on BS ISO 21527-2:2008 DIN EN ISO 6888-2 DIN EN ISO 16649-3 DIN EN ISO 6888-3 + 3 more
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ALS Germany

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DAkkS D-PL-14162-01-03 Altenberge, DE
DIN EN ISO 15587-1 DIN EN ISO 15587-2 DIN EN ISO 14403-2 DIN 38405-4 DIN 38405-8 + 3 more
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ALS Laboratories (UK)

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UKAS 1282 Templeborough, GB
on BS 4401:Part 3:1970(1986) ISO 12966-2 AM/C/108 based on BS EN ISO BS 684 2.14:2001 BS EN 288-Part 9 :1999 + 3 more
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ALSTOM Ferroviaria S.p.a. - Laboratorio di prova Area Esperienze

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ACCREDIA 01195 Savigliano, IT
DIN EN 50215 ISO 15302
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ALSTOM Transport VPF

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COFRAC 1-5603 Petite-Foret, FR
DIN EN ISO 11546-1 prEN 16185-2 EN 15595 (hors essais au
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ALSTOM Transportation Germany GmbH Prüfstelle für eisenbahntypische Prüfungen an Schienenfahrzeugen

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DAkkS D-PL-11003-07-00 Görlitz, DE
DIN 27201-5 DIN 25043-1 DIN 25043-2 DIN EN 13272 DIN EN 13272-1 + 3 more
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ALTER TECHNOLOGY TÜV NORD, S.A. (Unipersonal)

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ENAC LE808 Tres Cantos, ES
IEC 60068-2-1 IEC 60068-2-2 UNE-EN 60068-2-14 UNE-EN 60068-2-78 IEC 60068-2-6 + 3 more
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AMETEK GmbH Geschäftsbereich Taylor Hobson

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DAkkS D-K-15032-02-00 Weiterstadt, DE
Railway brake — magnetic track brakes (U auch als Vor-Ort-Kalibrierung Rillentiefe Pt auf 0,2 µm Tiefeneinstellnormalen Rauheit auf Raunormalen + 3 more
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AN DIAG

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COFRAC 1-7298 Saint Etienne Du Rouvray, FR
NF X 43-269 NF X 43-269 - Annexe K NF X43-050 (parties utiles de ISO 22262-1 NF X 43-050 + 1 more
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ANALYSIS A.C. di Alessandra Caratelli

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ACCREDIA 01245 Colleferro, IT
DIN EN ISO 10272-1 ISO 17604 ISO 18593 DIN EN ISO 6888-1 DIN EN ISO 6579-1 + 3 more
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APAVE EXPLOITATION FRANCE

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COFRAC 1-7202 Courbevoie, 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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APEC Environmental

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UKAS 2136 Hebburn, GB
QOP03 based on HSG 248 QOP01 based on HSG 248 (HSG 248) – 2021 (PCM) based on HSG 248
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APEC Environmental

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UKAS 0347 Hebburn, GB
(HSG 264, 2012)
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APPLUS METROLOGY, S.L. (Unipersonal)

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ENAC LC10.017 Leganés, ES
CEM DI-002 EURAMET CG-2 CEM DI-014 CEM DI-006 CEM DI-016 + 3 more
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APPLUS NORCONTROL, S.L.(Unipersonal) (APPLUS)

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ENAC LE201 Sada, ES
ISO 6059 ASTM D 1209 UNE-EN ISO 8467 SM 4500-NH D 3 UNE 77048 + 3 more
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AQCLAB SOFTWARE QUALITY, S.L. (AQCLAB)

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ENAC LE2307 Puertollano, ES
ISO/IEC 25010 ISO/IEC 25040 ISO/IEC 25012 ISO/IEC 5259-2
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AQRAT

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DAkkS D-K-15060-01-00 Dettingen unter Teck, DE
Messschieber für 0 mm Außen-, Innen- und > 500 mm > 1000 mm Tiefenmessschieber * 0 mm Sondermessschieber 0 mm + 3 more
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AQUABIO

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COFRAC 1-7428 Saint Germain Du Puch, FR
DIN ISO 17289 NF T 90-395 NF T 90-354 NF T 90-393 NF T 90-328 + 3 more
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AQUANALYSE Laboratoire

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COFRAC 1-2194 Plancy L'Abbaye, FR
NF T 90-412 DIN EN ISO 7899-1 DIN EN ISO 10304-1 DIN EN 12880 ISO 5815-1 + 3 more
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ARAL - ASSOCIAZIONE REGIONALE ALLEVATORI DELLA LOMBARDIA - LABORATORIO LATTE AGROALIMENTARE

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ACCREDIA 00456 Crema, IT
DIN EN ISO 6888-2 DIN EN ISO 10272-1 DIN EN ISO 11290-1 DIN EN ISO 4833-1 ISO 21527-1 + 3 more
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ARMOUR Analytical Services

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UKAS 20835 Warmley, GB
(HSG 264, 2012)
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AS International Corporation

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UKAS 9924 Netherton, GB
ISO 10469:2006) (Based on ISO 10258:2018)
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AS International Corporation

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UKAS 4352 Liverpool, GB
ISO 5983-1:2005/Cor.1:2008, ISO20483:201 07L.1.07 based on ISO 6865:2001 ISO 712 07L.1.02 based on ISO 6496:1999, ISO 12966-2 + 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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