Manufacturing

Source high-quality materials from certified suppliers (stainless steel 304/316, carbon steel SWC/SWP, alloy steel 55CrSi)
Conduct incoming material inspection (spectral analysis for composition, tensile strength testing)
Batch number tracking for full traceability

Step 2: Precision Forming (Coiling/Bending)

Use advanced CNC machines (15-axis for springs, 12-axis for wire formings) for high-precision forming
Real-time monitoring of production parameters (wire tension, coiling speed, bending angle)
Custom tooling for complex shapes and special designs

Step 3: Heat Treatment

Quenching and tempering process to enhance material hardness, elasticity, and fatigue resistance
Temperature control (±5℃) for consistent performance
Post-heat treatment cooling to prevent deformation

Step 4: Secondary Processing (End Grinding/Hook Forming)

End grinding for compression springs (flatness tolerance ≤ 0.01mm)
Precision hook forming for tension springs (no deformation, strong load-bearing)
Deburring and polishing to remove surface defects

Step 5: Surface Treatment

Corrosion-resistant treatments: zinc plating, nickel plating, passivation, black oxide, powder coating
Anti-static treatment for electronics-grade springs
RoHS/REACH compliant coatings for global markets

Step 6: Quality Control & Testing

100% dimensional inspection (CNC measuring instruments)
Performance testing (load/torque testing, fatigue life testing, salt spray testing)
Visual inspection for surface quality and packaging compliance

Step 7: Packaging & Shipping

Anti-rust, anti-static packaging for precision components
Palletized packaging for bulk orders
Batch labeling with part number, quantity, and test report

Our Manufacturing Strengths

1. Advanced Production Equipment

CNC spring coiling machines
Automatic heat treatment furnaces (temperature precision ±5℃)
Precision testing equipment (fatigue tester, torque tester, salt spray tester)

2. Production Capacity & Lead Time

Monthly capacity: 500,000+ pieces (standard springs), 200,000+ pieces (custom components)
Sample lead time: 3–7 days
Mass production lead time: 7–15 days (standard), 15–30 days (complex custom)
Expedited production available for urgent orders

3. Quality & Compliance

ISO 9001:2015 and IATF 16949:2016 (automotive-grade) certified
Compliance with ASTM, DIN, JIS, GB standards
RoHS/REACH compliant for electronics and medical applications
Zero-defect delivery commitment for regular clients

4. Customization Expertise

Accept custom drawings (PDF/STEP/CAD) and detailed specifications
Engineering support for design optimization and manufacturability
Small-batch production (MOQ 100 pieces) and large-volume orders supported

The Guanglei 5-Step Process

Step 1: Connect & Define

Your journey begins by sharing your requirements. Simply send us your drawings, samples, or specifications. Our engineering team will review your needs and provide a detailed proposal with expert recommendations and a transparent quote, typically within 48 hours.

Step 2: Design & Engineer

Upon approval, our engineers conduct a thorough analysis. Using advanced software, we simulate spring performance, validate materials, and optimize the design for manufacturability and cost-effectiveness. We finalize all details with you before moving to production.

Step 3: Prototype & Validate

Before full-scale production, we create precision prototypes for real-world testing. This critical step allows you to verify form, fit, and function, ensuring the spring performs exactly as intended in your application.

Step 4: Produce & Assure

With sample approval, we launch into mass production using our state-of-the-art CNC coiling and automated equipment. Every batch undergoes rigorous quality checks, including 100% Automated Optical Inspection (AOI) to guarantee consistent perfection.

Step 5: Deliver & Support

We ensure your order is carefully packaged and shipped to meet your timeline, anywhere in the world. Our relationship continues with ongoing support for any future needs, making us your reliable long-term spring partner.