Hot-Coiled Suspension Springs

We manufacture high-durability hot-coiled suspension springs designed for demanding industrial, transportation, and heavy-machinery applications:

Material: Premium spring steel bars (e.g., 51CrV4 / 54SiCr6 / 60SiCr7 / 50CrV4).
Bar dimensions: Bar diameter 12.00 - 60.00 mm; bar length up to 7900 mm.
Spring applications: Railway wagons, railway bogies, trucks, cars, tramways, tractors, excavators, graders, and other heavy industrial machinery.

JSC 'SPRING FACTORY' is the sole Bulgarian manufacturer of:
• Hot-coiled heavy industrial springs
• Suspension helical springs for Y25 railway bogies & wagons (in full compliance with UIC standards)

Heavy-duty hot-coiled suspension springs manufacturer

UIC certified Y25 railway bogie suspension springs made in Bulgaria

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