Home › Springs (Compression, Torsion, Extension, Wire Forms)
Springs (Compression, Torsion, Extension, Wire Forms)
Springs are quoted from wire diameter, mean diameter, free length, active coils, material and end configuration, so a spring drawing or a sample plus load height at two measurement points is enough for a factory to compute rate and stress. Small-diameter precision springs need a set, shot-peen or grinding step that changes price more than the material does.
Industrial belt
Yangzhou (Guangdong) and Ningbo / Cixi (Zhejiang) for small precision springs; Xingtai (Hebei) for large and heavy-duty springs
Typical products
Materials
Surface finishes
Standards you will quote against
Specification reference
| Attribute | What to specify |
|---|---|
| Wire dia | 0.1–25 mm depending on machine class |
| Rate tolerance | ±10% typical; ±5% with selective grinding or shim |
| Fatigue | Set removal + shot peening raises cycle life several times |
| End forms | Closed ground, open, squared; hooks: half circle, extended, swivel |
| Coating impact | Plating adds thickness to ID/OD — declare it on close-fit assemblies |
| Materials test | Wire certificate per batch; load sorted 100% on automatic lines |
Factories listed in this category
No factory page is published in this category yet. The specification table above is already usable for quotation; factory pages are added under this category URL as they are onboarded.
Questions buyers ask
How do I order a custom spring without a drawing?
Send the physical sample with three measurements — wire diameter, outside diameter, free length — plus the working load at two installed heights, and the material/environment requirement. A factory can reverse-engineer a rate curve from that and confirm it with a first-article sample before serial production.
Why does a stainless spring cost more than a music-wire spring of the same size?
Stainless wire (302/304) has lower tensile efficiency, so achieving the same load needs a larger wire or heat-treated grades like 17-7 PH; coiling also wears tooling faster and holding rate tolerance needs more sorting. If corrosion, not strength, is the requirement, plated carbon spring is the cheaper option.