Production starts with coiled wire. CNC coiling machines and multi-slide formers precisely bend, cut, and shape wire into complex forms, with secondary operations including end forming, threads, and hooks. Parts undergo stress relieving, deburring, and surface finishing such as zinc plating, nickel plating, black oxide, or phosphate coating when required. Each component is inspected to customer drawings, providing OEMs with a reliable one-stop wire forming solution from coil to finished part.
Spring Steel Wire Grades We Form
Wire grade plays a critical role in the strength, fatigue performance, and service life of a wire form part. We regularly work with several spring wire families:
- Music wire (SWP-A/SWP-B, EN 10270-1 SH): High tensile strength and excellent fatigue resistance, commonly used for precision clips, springs, and parts exposed to repeated loading.
- Oil-tempered chrome silicon wire: Designed for higher stress applications, offering improved fatigue performance and heat resistance for demanding mechanical components.
- Stainless spring wire (302/304, 17-7PH): Provides corrosion resistance for applications where protective coatings are unsuitable, including food processing, marine, and outdoor equipment.
- Hard-drawn carbon steel wire: A cost-effective choice for formed parts requiring good strength and shape retention rather than high spring performance.
During wire forming, our processes are controlled to maintain the material's mechanical properties while achieving the required geometry. For high-cycle applications, additional treatments such as stress relieving, shot peening, and presetting can be applied to improve fatigue performance and dimensional stability.
Typical Specifications
| Parameter | Capability / Options |
|---|---|
| Wire diameter | 0.2 – 12 mm (depending on material and part geometry) |
| Inside bend radius | ≥1× wire diameter for standard spring wire; larger radii recommended for heavy wire sections |
| Bend angle tolerance | Standard ±2°, tighter tolerances available upon request |
| Positional tolerance | Typically ±0.1 – ±0.3 mm depending on part complexity |
| Materials | Music wire (SWP-A/SWP-B), oil-tempered chrome silicon wire, stainless spring wire (302/304, 17-7PH), hard-drawn carbon steel wire |
| Heat treatment | Stress relieving, heat treatment, presetting for improved dimensional stability and fatigue performance |
| Surface finishes | Zinc plating, nickel plating, black oxide, phosphate coating, or natural finish |
| End forming options | Loops, hooks, chamfers, threaded ends, open or closed ends |
| Forming processes | CNC wire forming, CNC coiling, multi-slide forming, end forming, tumbling and deburring |
| Quality control | ISO 9001:2015 quality system, dimensional inspection according to customer drawings |
Where Custom Wire Formed Parts Are Used
cable guides, linkage wires, and latch clips for actuators.
instrument clips and tension elements that must not corrode.
tension clips, frame retainers, and gear hardware that live through weather and vibration.
Automotive and appliances:
spring clips, retaining rings, and hose clamps.
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