· Product Overview

· Core Specifications

• Material: 304 Stainless SteelOffers excellent corrosion resistance (compatible with outdoor/mild-moisture environments) and balanced tensile strength for reliable tension performance.
• Manufacturing Standard: ISO 9001-Certified Spring Fabrication Process
  • Key Processes: Cold coil winding (for uniform coil geometry), precision end loop forming (welded for structural stability), 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

• Outdoor & Recreational Gear: Connecting components in camping equipment (tent poles, gear straps), fishing tackle (lure connectors, rod guides), or hiking gear (backpack buckles).
• Industrial Equipment: Tensioning conveyor belt components, resetting mechanical levers, or securing movable parts in packaging machines.
• Automotive Accessories: Retracting seatbelt components, adjusting interior trim tension, or securing small undercarriage parts.
• DIY & Hobby Projects: Building custom mechanical devices, model vehicle suspension systems, or home hardware (gate latches, tool organizers).
• Marine Equipment: Securing small boat fittings (dock lines, hatch latches) thanks to corrosion-resistant stainless steel.

· Production Process Introduction

1. Raw Material Preparation: Source 304 stainless steel wire with consistent diameter (matched to target tension specs).
2. Cold Coil Winding: Use automated spring-winding machines to form uniform coils to the specified free length.
3. End Loop Forming: Shape and weld reinforced end loops (ensures stable attachment without breakage under tension).
4. Heat Tempering: Temper the springs in a controlled oven to set elastic tension and enhance resistance to 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 weld integrity, and check dimensional accuracy to meet spec requirements.

· 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 style (welded vs. formed), and tension force based on your technical drawings. Our engineering team will validate design feasibility for load and durability.