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
1,399 Accredited labs
17 Countries

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ENAC LE1870 Rinconada, ES
ISO 2808 ISO 48-4 UNE-EN ISO 2808 ISO 2409 UNE-EN ISO 2360 + 3 more
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ENAC LC10.201 Alacant, ES
(0,15 ± 0,02) · 10-2 mol/mol (0,50 ± 0,0 (6,0 ± 1,0) · 10-2 mol/mol (11,5 ± 2,0) (10 ± 2) · 10-6 mol/mol (50 ± 8) · 10-6 (0,15 ± 0,02) · 10-2 mol/mol (0,30 ± 0,0 1,000 ± 0,100 + 3 more
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ENAC LC10.234 Bollullos de la Mitación, ES
EURAMET cg-18 EURAMET cg-17 CEM Edición
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ENAC LE1385 Beasain, ES
DIN EN 13260 DIN EN 13261 DIN EN 13262 Railway end stop systems (EN 14752) Railway vehicle body structural requirem + 3 more
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ENAC LE149 Móstoles, ES
UNE-EN 60567 IEC 60814 UNE-EN 61198 IEC 60247 UNE-EN 61619 + 3 more
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CIEMAT

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ENAC LE471 Madrid, ES
OM H-3 based on ISO 9698:2019 ISO 13164-4 SM 3111 UNE-EN ISO 13160 ISO 10704 + 3 more
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ENAC LE2543 Santa Cruz de Tenerife, ES
UNE-EN ISO 5667-19 UNE-EN ISO 16665 UNE-EN 19493
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ENAC LE1355 Carreño, ES
SM 2510 B SM 4500 H+ UNE 7027-1 UNE 7887 SM 4500-NO B 2 + 3 more
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INSST

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ENAC LE2151 Sevilla, ES
UNE-EN 136 UNE-EN 148-1 UNE-EN 140 UNE-EN 149 UNE-EN 13274-7 + 3 more
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ENAC LE2532 Viladecavalls, ES
UNE-EN 61000-4-2 UNE EN 61000-4-5 UNE-EN 55016-2-1 UNE-EN 61000-4-11 UNE-EN 61000-4-8 + 3 more
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ENAC LE2384 Leganés, ES
ISO/IEC 15408-3 ISO/IEC 15408-1 ISO/IEC 15408-2 ISO/IEC 15408-4 ISO/IEC 15408-5 + 1 more
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ENAC LC10.255 Torrejón de Ardoz, ES
CEM EL-020 EURAMET cg-17 CEM EL CEM ME-004 EURAMET cg-11 + 3 more
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ENAC LE1009 Talayuela, ES
UNE 118019 UNE 118012 ISO 22980 UNE 118020 UNE 118021-2
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ENAC LE2170 Olot, ES
SM 3111 B SM 3500-K B SM 3500-Na B SM 2330 B SM 3113 B UNE-EN ISO 8467 + 3 more
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ENAC LE147 Campanillas, ES
IEC 61730-2 IEC 61215-1-2 IEC 61215-2 IEC 61215-1-3 IEC 61215-1-4 + 3 more
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ENAC LC10.204 Fuenlabrada, ES
0 mV  U < 330 mV 330 mV  U < 3,3 V 3,3 0 mV  U < 120 mV 120 mV  U < 1,2 V 1,2 0 A  I  330 A 330 A < I  3,3 mA 3, 20 A  I  1025 A 20 A  I  1025 A F = 50 Hz + 3 more
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ENAC LE776 Madrid, ES
SM 5210 D UNE-EN ISO 27888 SM 5220 D SM 2130 B UNE-EN ISO 11885 + 3 more
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DRACE GEOCISA

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ENAC LE334 San Fernando de Henares, ES
EPA 9056 ISO 13167 SM 3120 B ISO 13166 UNE 73350-1
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ENAC LC10.254 Sevilla, ES
50 ∙ 10-9 mol/mol ≤ C ≤ 237 · 10-9 mol/m 30∙ 10-9 mol/mol ≤ C ≤ 500 ∙ 10-9 mol/mo 50 ∙ 10-9 mol/mol ≤ C ≤ 1000 · 10-9 mol/ 50 ∙ 10-9 mol/mol ≤ C ≤ 237∙ 10-9 mol/mo 0,5 ∙ 10-9 mol/mol ≤ C ≤ 15 ∙ 10-9 mol/m + 1 more
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ENAC LC10.206 Sant Cugat del Vallès, ES
200 kg/h ≤ m ≤ 60000 kg/h 200 l/h ≤ Q ≤ 60000 l/h 200 kg/h ≤ m ≤ 30000 kg/h 200 l/h ≤ Q ≤ 30000 l/h 700 Pa ≤ P ≤ 2 MPa + 3 more
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ENAC LE1853 Maliaño, ES
UNE-EN ISO 6892-1 DIN EN 10002-1 ASTM E 8 ASTM E 208 ASTM E208-06 + 3 more
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ENAC LE2182 Coslada, ES
UNE 64106 BS ISO 6731:2010 UNE-EN ISO 712 UNE-EN ISO 5534 ISO 13580 + 3 more
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ENAC LE486 Llanera, ES
UNE-EN ISO 10304-3 UNE-EN ISO 10304-1 UNE-EN ISO 6878 UNE-EN 1484 SM 10200 H + 3 more
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ENAC LE268 Castellón de la Plana, ES
UNE 77061 UNE-EN ISO 15681-2 SM 4500-NH3 F UNE-EN ISO 8467 UNE-EN ISO 6878 + 3 more
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ENAC LE236 Loeches, ES
UNE-EN ISO 20884 UNE-EN ISO 12185 UNE-EN ISO 12156-1 ASTM D 93 ASTM D 2622 + 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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