Scope
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
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NBN EN 13262
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DIN EN 13262
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BS EN 13262
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NF EN 13262
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UNI EN 13262
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UNE EN 13262
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NEN EN 13262
3,987
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EPPO PM 7/79 rev 2 2016/Cor 2017
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ISO 18743
Reg UE 1375/2015 10/08/2015 GU UE
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OIV-MA-AS313-02 R2015
OIV-MA-AS2-03B R2012
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OIV-MA-AS2-01 Met B R2021
OIV-MA-AS323-04A2 R2021
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Rapporti ISTISAN 2007/31 pag 55 Met
AFNOR IDX 33/03-10/13
Rapporti ISTISAN 2007/31 pag 68 Met
S.M.T.
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Tensile testing of metallic materials (I
Charpy impact test (ISO 148-1)
DIN EN ISO 7438
DIN EN ISO 5173
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ISO 4832
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ISO 7899-2
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