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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Circ Min Trasp n 18911 02/08/2018
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ISO 4833-2 based on ISO 13366-2:2006 ISO 14675 UNI 10935 UNI 10934 + 3 more
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ATP ECE/TRANS/347
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DIN EN ISO 5983-2 ISO 18787 ISO 21527-1 DIN EN ISO 4833-1 DIN EN ISO 6888-2 + 3 more
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based on ISO 13366-2:2006 ISO 9622 ISO 13366-2 AOAC DSM Delvotest SP-NT Visual n 011102
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ISO 4832 DIN EN ISO 6888-2 ISO 6222 ISO 7899-2 ISO 9308-1 + 3 more
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BS EN 15662 UNI EN 15662 COI/T.20/Doc n 35/rev 1 2017 COI/T.20/Doc n 34/rev 1 2017 COI/T.20/Doc n 19/rev 5 2019 + 1 more
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ISO 6222 ISO 7899-2 ISO 9308-1 BS EN ISO 17294-2 Rapporti ISTISAN 2007/31 pag 55 Met + 1 more
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ACCREDIA 02100 Catania, IT
Circ Min Trasp n 18911 02/08/2018
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DIN EN 13126-19 DIN EN ISO 15587-2 DIN EN ISO 10304-1 DIN EN ISO 12846 DIN EN ISO 9377-2 + 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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