Span Clamp (suspension wire clamp) is an indispensable core hardware in power transmission lines and optical cable communication systems. It is designed for fixing conductors, ground wires or optical cables in overhead lines. The Span Clamp produced by Handan Jinmai Fastener Manufacturing Co., Ltd. adopts a modular structure, which can accurately adapt to cables of different diameters. It effectively disperses tension through mechanical optimization design to ensure the stability of the line in extreme environments such as strong winds, ice and snow. The product is widely used in scenes such as high-voltage transmission towers, communication base stations and cross-sea bridges, and is the "invisible guardian" of power grid security and signal transmission.
1. High strength and corrosion resistance
The main body is made of ASTM A36 high-strength steel, with hot-dip galvanizing treatment on the surface (zinc layer thickness ≥ 85μm), and has passed the ISO 1461 standard salt spray test. It can withstand C5-level industrial corrosion environment and has a service life of more than 30 years.
2. Excellent mechanical properties
The patented V-shaped clamping groove design, combined with high-precision rubber pads, achieves uniform distribution of cable clamping force, effectively avoids cable wear caused by local stress, and has a dynamic load bearing capacity of 8-12kN.
3. All-weather adaptability
The performance is stable in a wide temperature range of -40℃ to +80℃, and it has passed the IEC 61395 anti-ultraviolet aging test, suitable for complex climate areas such as deserts, coastal areas, and high altitudes.
4. Intelligent installation design
Pre-installed anti-loosening bolts + visual torque markings, support quick installation without professional tools, increase construction efficiency by 40%, and reduce the risk of high-altitude operations.
Handan Jinmai strictly implements the IATF 16949 quality management system, and the manufacturing process covers:
1. Precision casting
Using lost foam casting technology, 3D laser scanning ensures that the casting size error is ≤0.2mm
2. CNC machining
Japan MAZAK five-axis machine tool processes key contact surfaces, and the surface roughness is controlled within Ra3.2μm
3. Environmentally friendly surface treatment
Six-step galvanizing: degreasing → pickling → auxiliary plating → 850℃ hot dipping → centrifugal treatment → passivation
4. Intelligent assembly
Robotic arm automatic assembly system, each product comes with a unique traceability QR code to achieve full life cycle quality control
Applicable cables: Steel core aluminum stranded wire/OPGW optical cable/ADSS optical cable with a diameter of 12-50mm
Destructive load: ≥12kN (third-party SGS test report number can be checked)
Weight range: 2.8-9.6kg (differentiated by model)
Electrical performance: Lightning impulse withstand voltage 230kV, radio interference level <58dB
Packaging standard: Anti-rust oil paper + PE film vacuum packaging, shipping-grade wooden box with a load capacity of 1.2 tons
As the largest power fittings production base in North China, Handan Jinmai Fastener Manufacturing Co., Ltd. has been deeply involved in the industry for 18 years and has provided Span Clamp solutions for 56 national power grid upgrade projects. We have:
✅ Real-time monitoring of the process by national laboratories
✅ EU CE/US UL dual certification quality
✅ 72-hour rapid response to global customer needs
Continuously output high-reliability connection products for new infrastructure fields such as UHV power transmission and 5G communication networks. Choosing Jinmai Span Clamp means choosing a quality commitment that will never break through mountains and seas.
Visit the official website now to get the engineering selection manual！
Email: [email protected]
WhatsApp/wechat: +86 13831001495
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