· Product Overview

· Core Specifications

• Material: 304 Stainless SteelOffers excellent corrosion resistance (suitable for indoor/outdoor dry/mild-moisture environments) and balanced tensile elasticity for rotational tasks.
• Manufacturing Standard: ISO 9001-Certified Spring Fabrication Process
  • Key Processes: Cold coil winding (for uniform core geometry), precision hook forming (angled for easy mounting), heat tempering (stabilizes torque and fatigue resistance), and surface passivation (enhances rust protection).
  • Tolerances: Wire diameter ±0.03mm, coil diameter ±0.1mm, hook length ±0.5mm; torque output ±5% (at specified twist angle).
  • Performance: Reusable cycle ≥10,000 times (without loss of rotational force).

· Application Scenarios

• Electronic Devices: Reset mechanisms for toggle switches, battery compartment latches, or small sensor pivot parts.
• Hardware & Locks: Return springs for cabinet door latches, keyed lock mechanisms, or hinge tensioners.
• Toys & Hobby Kits: Rotational components for wind-up toys, model vehicle hinges, or craft mechanical builds.
• Daily Hardware: Reset parts for utility knife blade retractors, binder clip mechanisms, or small tool latches.
• Small Appliances: Pivot tensioners for toaster lever resets or coffee maker lid latches.

· Production Process Introduction

1. Raw Material Preparation: Source 304 stainless steel wire with consistent fine diameter (matched to the spring’s torque requirements).
2. Cold Coil Winding: Use automated micro-spring winding machines to form the tight, uniform core coil (optimized for controlled torque).
3. Hook Forming: Shape dual angled hooks (via precision tooling) to align with target mounting components.
4. Heat Tempering: Temper the springs in a controlled low-heat oven to set elastic tension and prevent permanent deformation.
5. Surface Passivation: Apply a chemical treatment to enhance the stainless steel’s natural corrosion resistance.
6. Quality Inspection: Test torque output (via micro-torque meters), verify hook alignment, and check coil uniformity to meet spec standards.

· Packaging and Shipping Methods

• Packaging: Individual springs are sealed in anti-scratch, static-dissipative plastic bags; bulk orders are packed in foam-lined partitioned boxes (to prevent coil tangling or hook 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 fit/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 coil diameter, hook shape/angle, wire diameter, and torque output based on your technical drawings. Our engineering team will validate design feasibility for rotational performance.