Description
Technical Parameters
↵Rail Nabla Clip Fastening System
The Railway Nabla Clip is a symmetrical, flat-section spring fastener named for its inverted delta (∇) shape, engineered for concrete sleeper track systems . Manufactured from high-strength 60Si2MnA/60Si2CrA spring steel with 42-47 HRC hardness, it delivers consistent clamping force through elastic deflection . The system includes insulators and screw spikes, providing electrical isolation and superior lateral force absorption .
Technical Specifications:
| Parameter | Specification | Performance Indicator |
|---|---|---|
| Geometric Shape | Inverted delta (∇) / V-profile | Flat-section, double-arch design |
| Material Grade | 60Si2MnA / 60Si2CrA | 42-47 HRC hardness |
| Thickness | 4.0 mm – 4.5 mm | Cold-rolled spring steel strip |
| Fatigue Life | 5 million cycles | No breaking under EN 13146-4 |
| Insulation Resistance | ≥1×10⁸ Ω per assembly | PA66+30% glass fiber insulator |
| System Components | 2 clips + 2 insulators + 2 spikes + 2 washers | Per rail seat assembly |
Installation & Maintenance Perspective:
- The flat-section design creates a broad rectangular bearing surface, distributing clamping force evenly across the rail foot .
- Broad surface contact prevents localized "brinelling" indentation effects common with round-wire clips under heavy traffic loads .
- Symmetrical double-arch geometry provides uniform stress distribution, eliminating torsional forces found in asymmetric clip designs .
Maintenance & Operational Perspective
- Reinforced nylon insulators (PA66+30% glass fiber) provide tensile strength ≥170 MPa and insulation resistance ≥1×10⁸ Ω .
- Screw spikes (Grade 5.6, 35# steel) deliver tensile strength ≥500 MPa with 90° cold bend capability .
- The system can be pre-assembled on sleepers before delivery, enabling faster construction rates .
Gnee Professional supplier
shanghai
Shenzhen Mandarin Oriental H
Hot Tags: high tensile nabla clips, China high tensile nabla clips manufacturers, suppliers, factory, rail clip conductive coating, rail clip measuring tools, rail clip metallic coating, rail clip non magnetic coating, rail clip positioning, weatherproof rail clip coating
