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The Nabla clip rail fastening system is a commonly used solution for securing railway tracks, consisting of Nabla elastic clips and connecting plates that join the rails to the sleepers. Its design effectively absorbs and disperses vibrations and shock forces from railway operations, ensuring that the rails remain firmly in place and preventing track loosening or movement.
The Nabla system creates a dynamically stable toe load on the rail when the nut is torqued which makes it suitable for high-speed rail, heavy rail, and urban transit systems. Its ability to handle significant vibrations and impacts makes it ideal for both passenger and freight railways. In recent years, it has also been extensively applied in ore transport railways in North Africa, demonstrating its versatility and reliability in demanding conditions. The system's reliable performance contributes to track stability and safety, extending the lifespan of the railway infrastructure and reducing maintenance needs.
The complete Nabla fastening system for each sleeper consists of the following components
| Part name | Pieces required | Material | Size | Note |
| Nabla clip | 4 | 60Si2MnA, 60Si2CrA | 4mm or 4.5mm thick | 42-47HRC 3 million times without breaking; Application for different rail type |
| Insulator | 4 | Reinforced Nylon 66 (PA66) | Density:1.3-1.45g/cm3 Tensile strength:≥170Mpa Elongation:≤4.4% Bending Strength:≥250Mpa Impact Strength(No gap):≥80KJ/m2 Melting point:250-270℃ Insultion resistance:≥1X108Ω Glass fiber content:30-35% Hardness:≥110HRR | |
| Screw spike | 4 | Grade5.6:35# | UIC54,UIC60,50kg rail,60kg rail | Tensile strength:≥500Mpa Yield strength:≥300Mpa Elongation:≥20% Cold bending:90 degree without crack |
| Spring washer | 4 | ML08AI | 18.25x34x78mm | Chemical composition(%): C:0.05-0.10, Mn:0.30-0.60, Si:≤0.1, Cr:≤0.2, P:≤0.035, S:≤0.035 |
The SKL clip rail fastening system is widely used for both ballasted tracks and concrete sleepers.
The KPO clamp rail fastening system is a commonly used solution for securing railway tracks.
The fist rail fastening system is firstly developed in Sweden. This rail fastening system is widely used in the railroad in South Africa, Zimbabwe, Botswana, Swaziland and Namibia.
The demand for fast clip rail fastening system is growing faster than other railroad fastener in the industry.
W14HH type rail fastening system is designed for heavy haul rail with a maximum acceptable axle load of 350 kN.
The W14 fastening system is designed according to the EN13481-2 standard, allowing a maximum axle load of 260kN.
The W30 rail fastening system is widely used on ballasted tracks and concrete sleepers.
The RNY rail fastening system is designed for use in railway projects across Mexico and North America, specifically for securing 115RE rails on concrete sleepers.
The NY-ES rail fastening system is designed for railway projects in Mexico and North America, specifically for securing 115RE rails on concrete sleepers.
The NY-GN rail fastening system is specifically designed for railway projects in Mexico and North America, ideal for securing 115RE rails on concrete sleepers.
The E-clip rail fastening system is a widely adopted solution for securing railway tracks, featuring E-clip fasteners along with iron pads or embedded fittings that connect the rails to the sleepers.
The Nabla clip rail fastening system is a commonly used solution for securing railway tracks, consisting of Nabla elastic clips and connecting plates that join the rails to the sleepers.
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