· Product Overview

· Core Specifications

• Material: 1070 High-Carbon Steel (Optimized for Spring Elasticity)
  • Surface Treatment: Black Oxide Coating (enhances corrosion resistance, reduces light reflection, and adds wear protection).
• Manufacturing Standard: ISO 9001-Certified Spring Fabrication Process
  • Key Tolerances: Wire diameter ±0.05mm, free length ±1.0mm, tension force ±5% (at specified stretch length).
  • Fabrication Highlights: Cold coil winding (for uniform geometry), precision loop forming (secure mount compatibility), heat tempering (stabilizes tension and fatigue life), and post-coating quality validation.

· Application Scenarios

• Industrial Equipment: Conveyor belt tensioners, door latch mechanisms, and packaging machine retraction components (where corrosion resistance and low light reflection are preferred).
• Automotive Systems: Interior panel fasteners, seat adjustment tensioners, and trunk/hood latch springs (matches dark aesthetic and withstands mild undercarriage moisture).
• Furniture & Hardware: Cabinet door hinges, drawer slide tensioners, and custom furniture closure systems (sleek black finish blends with dark metal/wood designs).
• DIY & Custom Projects: Garage door hardware, tool accessory tension parts, and hobbyist mechanical builds (easy to install and visually cohesive).
• Electronic Enclosures: Panel latch springs for industrial control boxes or consumer electronics casings (discreet black appearance complements device exteriors).

· Production Process Introduction

1. Raw Material Preparation: Source 1070 high-carbon steel wire (consistent diameter matched to target spring specifications).
2. Cold Coil Winding: Use automated spring-winding machines to form uniform coils to the desired free length.
3. Loop End Forming: Shape dual single-loop ends (via precision tooling) to ensure secure, compatible attachment to mounting hardware.
4. Heat Tempering: Temper the spring in a controlled oven to optimize elastic tension and enhance long-term fatigue resistance.
5. Black Surface Coating: Apply a matte black oxide coating (or powder coating) to the finished spring for corrosion protection and aesthetic uniformity.
6. Quality Inspection: Conduct tension force testing (via spring dynamometers), dimensional verification, and coating adhesion checks 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 padded corrugated boxes with partitioned layers (to prevent spring deformation or coating 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): 100 pieces per spring specification; small sample packs (10–20 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, or surface coating type (e.g., black powder coat vs. oxide) based on your technical drawings. Our engineering team will validate design feasibility for production.