FAQ

A: We are a leading manufacturer of high-precision springs with IATF 16949 certification, located in Shanghai.

A: We work with:

• High-carbon steel (Grade 65Mn/70Mn) – most common for industrial use
• Stainless steel (301/302/304/316) – corrosion resistance
• Alloy steel (50CrV/55CrSi/60Si2Mn) – high-temperature resistance
• Custom materials (available upon request)

A: Our CNC coiling machines achieve:

• ±0.5% (Wire diameter)
• ±1.5% (Free length)
• ±1° (Pitch angle)

A: Yes! We specialize in:

• Custom shapes (Conical, Barrel, Double torsion)
• Special surface treatments (Electroplating, Powder coating, Electrophoretic coating)
• Extreme-condition springs (High temperature / Cryogenic)

A: Our engineers offer:

• Free spring force calculations
• Fatigue life simulation reports

A: We offer reverse engineering services:

1. Send samples (3–5 pcs ideal)
2. We’ll analyze material & performance
3. Provide matched prototypes within 7 days

• Existing catalog items (≤5 pcs): you only pay actual shipping cost.
• Custom sample service: $50 refundable fee (deducted from future orders).