· Product Overview

· Core Specifications

• Material: 304 Stainless SteelOffers excellent corrosion resistance (compatible with dry/mild-moisture settings) and balanced tensile strength for stable tension performance.
• Manufacturing Standard: ISO 9001-Certified Spring Fabrication Process
  • Key Processes: Cold coil winding (for uniform coil geometry), precision loop forming (reinforced for load-bearing), heat tempering (stabilizes tension and fatigue resistance), and surface passivation (enhances rust protection).
  • Tolerances: Wire diameter ±0.05mm, free length ±1.0mm, tension force ±5% (at specified stretch length).
  • Performance: Max safe stretch ratio: 40% of free length; reusable cycle ≥12,000 times (without force degradation).

· Application Scenarios

• Industrial Equipment: Tensioning conveyor belt components, resetting mechanical levers, or securing movable parts in packaging machines.
• Outdoor & Recreational Gear: Connecting camping tent poles, fishing tackle components, or hiking backpack strap adjusters.
• Home & Furniture Hardware: Retracting cabinet door latches, balancing window screen tension, or securing DIY storage rack parts.
• Automotive Accessories: Adjusting interior trim tension or securing small undercarriage fittings.
• Electronic Devices: Maintaining tension in small sensor mounts or cable management components.

· Production Process Introduction

1. Raw Material Preparation: Source 304 stainless steel wire with consistent diameter (matched to target tension specifications).
2. Cold Coil Winding: Use automated spring-winding machines to form uniform coils to the specified free length.
3. Loop End Forming: Shape reinforced dual loop ends (ensures stable attachment under pulling force).
4. Heat Tempering: Temper the springs in a controlled oven to set elastic tension and prevent permanent deformation.
5. Surface Passivation: Apply a chemical treatment to boost the stainless steel’s natural corrosion resistance.
6. Quality Inspection: Test tension force (via spring dynamometers), verify loop integrity, and check dimensional accuracy to meet spec standards.

· Packaging and Shipping Methods

• Packaging: Individual springs are sealed in anti-scratch, rust-inhibiting plastic bags; bulk orders are packed in foam-lined partitioned boxes (to prevent coil tangling or loop damage during transit).
• Shipping: Flexible logistics options:
  • Express Delivery (DHL/FedEx/UPS: 3–5 business days)
  • Air Freight (7–10 business days)
  • Sea Freight (20–30 business days)All shipments include full tracking and damage insurance.

· Process

· Frequently Asked Questions (FAQ)

• MOQ (Minimum Order Quantity): 500 pieces per spring specification; small sample packs (20–50 pieces) are available for performance testing.
• Lead Time: Standard lead time is 7–10 working days after order confirmation; expedited production (5–7 working days) is available for urgent orders (additional fees apply).
• Customization Capability: Full customization is supported—we can adjust wire diameter, free length, loop size, and tension force based on your technical drawings. Our engineering team will validate design feasibility for load and durability.