The Extension Rod produced by Handan Jinmai Fastener Manufacturing Co., Ltd. is a core connection component designed for power transmission systems, communication base stations and optical cable installation. The modular structure design can achieve accurate extension and angle adjustment of power fittings and communication accessories. It is suitable for power transmission and transformation line reinforcement, communication tower expansion and optical cable installation in complex terrain. The product is certified by ISO 9001 quality management system and meets the requirements of international standards such as ASTM and DIN.
✅ High-strength composite material
The rod body adopts Q345B low-carbon alloy steel and aviation-grade aluminum alloy composite casting process, with a tensile strength of ≥550MPa, 35% lighter than traditional cast iron material, and excellent anti-bending performance.
✅ Triple anti-corrosion system
The original "hot-dip galvanizing + epoxy powder spraying + anodizing" composite protective layer has no rust after 2000 hours of salt spray test, suitable for high-corrosion environments such as coastal areas and industrial areas.
✅ Intelligent connection design
The patented quick-release buckle system supports 360° rotation locking, equipped with 5 sets of standardized interfaces (Φ16mm/Φ20mm/Φ25mm/Φ32mm/Φ40mm), and is compatible with mainstream international brand hardware accessories.
✅ Engineering-grade load-bearing capacity
The axial load-bearing capacity of a single rod reaches 8.5 tons, and the lateral wind pressure resistance level meets the IEC 61400-22 Class II standard, which can maintain structural stability in a strong wind environment of level 12.
1. Precision casting
The lost foam vacuum casting technology is used, and the metal composition is monitored in real time with a spectrometer to ensure that the material uniformity error is ≤0.3%.
2. CNC machining
The German DMG five-axis linkage machining center performs thread milling, with a surface roughness of Ra≤3.2μm and a matching accuracy of IT7.
3. Surface treatment
The fully automatic electrophoretic coating line achieves a uniform coating of 10-15μm, and a dense protective film is formed by high-temperature curing at 230℃.
4. Assembly inspection
The laser alignment instrument calibrates the straightness of the rod body (error <0.1mm/m), and a 200-ton hydraulic testing machine is equipped for destructive sampling.
Standard length: 1.5m/2m/3m (supports non-standard customization, maximum extension length 15m)
Temperature adaptability: no performance degradation under -40℃~+120℃ working conditions
Electrical performance: volume resistivity>1×10⁹Ω·cm, partial discharge<5pC
Seismic level: passed GB/T 2423.10-2008 sinusoidal vibration test (amplitude 5mm, frequency 5-150Hz)
Packing specifications: moisture-proof vacuum packaging + wooden protective frame, suitable for long-distance transportation by sea/land
Conclusion：
As the core export product of Handan Jinmai Fastener Manufacturing Co., Ltd., this series of Extension Rod integrates 15 years of experience in the research and development of power fittings, adopts 6 exclusive patented technologies, and has been successfully applied to international projects such as Southeast Asian power grid transformation and Middle East 5G base station construction. We are equipped with a CNAS certified laboratory, providing free sample testing and ODM customization services, with an annual production capacity of 2 million pieces, and the delivery cycle is strictly controlled within 15-30 working days. Welcome to contact Email: [email protected] WhatsApp/wechat: +86 13831001495 to obtain the engineering case library and technical white paper, and let China's smart manufacturing escort your global projects!
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