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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ACCREDIA 01679 Cortenova, IT
Tensile testing of metallic materials (I Charpy impact test (ISO 148-1) DIN EN ISO 6506-1 DIN EN ISO 6507-1 DIN EN ISO 6508-1 + 3 more
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ACCREDIA 02069 Campochiaro, IT
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ENAC LC10.116 Puerto de Santa María, ES
3 mV  U < 330 mV 0,33 V  U < 3,3 V 3,3 0 mV  U < 200 mV 200 mV  U < 2 V 2 V  0 mV  U  100 mV 0,1 V < U  1 V 1 V < 5 mV  U  30 V 10 mV  U < 33 mV 50 Hz  f  1 kHz 1 kH + 3 more
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ACCREDIA 00624 Calcinaia, IT
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COFRAC 1-5915 Sainte Genevieve Des Bois, FR
NF X 43-050 NF X 43-269 ISO 16000-7 FD X 46-033
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UKAS 26761 Hammersmith, GB
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ENAC LE2121 Llinars del Valles, ES
ISO 9994 ISO 22702 ASTM F400 ASTM F2201
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BELAC 386-TEST Herstal, BE
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ACCREDIA 01986 Adrara San Martino, IT
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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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