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VHM is a traditional manufacturer and supplier of rolled rings and rims for railway vehicles in Central Europe. The key product in this area is specialized production of rolled rims for all types of railway vehicles – trams, locomotives, freight and passenger wagons.

In the rolled ring area, our manufacturing portfolio is focused on industrial applications, such as bearing rings, serrated rims, flanges, crane wheels and other products of this category according to customers’ requests and needs.

  • ROLLED RAIL-BOUND TIRES

    ROLLED RAIL-BOUND TIRES

    Materials

    B1-B6, GOST, ClassDHT, S100L, Fe 740, N72, S85V and more

    Inner diameter (dø)

    460 – 1800 mm

    Height (H)

    max. 160 mm

    Standards:

    Manufactured as per ISO 810-1

     

    Material composition and other production and testing parameters can be adapted to the customer’s additional requests.

  • ROLLED RINGS

    ROLLED RINGS

    Materials

    11 523, 15 241, 17CrNiMo6, 30CrNiMo8, 42CrMo4 and more

    Outer diameter (Dø)

    max. 2800 mm

    Inner diameter (dø)

    min. 280 mm

    Height (H)

    50 – 260 mm

    Wall thickness (s)

    45 – 250 mm

    Weight:

    75 – 2500 kg 

     

    Material composition and other production and testing parameters can be adapted to the customer’s additional requests.

  • TESTING

    TESTING

    We conduct the following trials and tests for rolled rims and rings:

    Rolled rail-bound tires

    Rolled rings

    Standard: As per UICa 810-1

    Standard: as requested by the client

    Surface hardness HB (Brinell)

    Surface hardness HB (Brinell)

    Tensile test

    Tensile test

    Notch test

    Notch test

    Hardness test on a test sample

    Hardness test on a test sample

    Chemical analysis

    Chemical analysis

    Macro + micro structure

    Macro + micro structure

    Macro-graphic test (Baumann method)

    Macro-graphic test (Baumann method)

    Micro-cleanness

    Micro-cleanness

    Grain size

    Grain size

    Ultrasound testing

    Ultrasound testing

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