Nabla Clip Rail Fastening System
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
- 4 pcs Anchor screw
- 4 pcs Screw fixing washer
- 4 pcs NABLA C1 clip
- 4 pcs Concrete insert
- 4pcs Insulator No.08
- 2 pcs Rail pad
| Part name | Pieces required | Material | Size | Note |
| 4 | 60Si2MnA, 60Si2CrA | 4mm or 4.5mm thick | 42-47HRC 3 million times without breaking; Application for different rail type | |
| 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 | ||
| 4 | Grade5.6:35# | UIC54,UIC60,50kg rail,60kg rail | Tensile strength:≥500Mpa Yield strength:≥300Mpa Elongation:≥20% Cold bending:90 degree without crack | |
| 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 |
