Rail fastening systems have a wide range of applications and are a core component for ensuring track stability and train safety. Their primary function is to firmly secure rails to wooden or concrete sleepers, while preventing lateral and longitudinal rail movement and absorbing vibrations and shocks generated during train operation.
Different types of fastening systems, such as E-clip, SKL, KPO, Nabla, WJ type, and Fast clip etc, are used in specific scenarios according to track requirements.
On high-speed railway lines, E-clip and SKL systems are commonly used. E-clip systems provide elastic clamping, ensuring track stability under high-frequency vibrations from fast-moving trains. SKL systems, combined with screws, flat washers, and plastic sleeves, offer higher clamping force and durability, maintaining precise track gauge and smooth train operation.
SKL Rail Fastening System
| Item | SKL tension clip | Ss35 screw spike | Flat washer | Plastic dowel | Guide plate | Rail pad |
|---|---|---|---|---|---|---|
| Quantity | 2 | 2 | 2 | 2 | 2 | 1 |
| Material | 60Si2CrA, 60Si2CrA, 38Si7 | Grade 4.6: Q235 Grade 5.6: 35# Grade 8.8: 45# |
Q235 | HDPE, Reinforced Nylon 66 (PA66) | Reinforced Nylon 66 (PA66) | EVA, or rubber |
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For heavy freight railways, KPO and Fast clip quick fastening systems are widely adopted. These systems use bolts, nuts, and spring washers to provide strong pull-out resistance and long-term stability, capable of withstanding high stress loads.
KPO Rail Fastening System
| Item | Rail clamp | Bolt | Nut | Plain washer | Screw spike | Spring washer | Base plate |
|---|---|---|---|---|---|---|---|
| Quantity | 2 | 2 | 2 | 2 | 4 | 4 | 1 |
| Material | Q235 | 4.6 | 4 | Q235 | 4.6 | 38Si7 | QT450-10 |
| Unit weight (kg/pc) | 0.67 | 0.302 | 0.153 | 0.05 | 0.553 | 0.08 | 7.932 |
| Surface Treatment | Zinc | Zinc | Zinc | Zinc | Hot-dip galvanized | Hot-dip galvanized | Plain |
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Nabla fastening systems are often applied in urban transit and high-speed lines, balancing clamping strength and electrical insulation, ensuring safety while meeting the requirements of electrified tracks.
| Item | Nabla clip | insulator | Screw spike | Spring washer OR Plastic dowel | |
|---|---|---|---|---|---|
| Quantity | 2 | 2 | 2 | Spring washer | Plastic dowel |
| 2 | 2 | ||||
| Material | 60Si2MnA, 60Si2CrA | Reinforced Nylon 66 (PA66) | Grade5.6:35# | ML08AI | HDPE, Reinforced Nylon 66 (PA66) |
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In addition, rail fastening systems are suitable for bridges, tunnels, curved tracks, and industrial railways. In these cases, auxiliary components such as rail pads, rail insulators, tie plates, bolts, screws, and plastic sleeves play a crucial role in load distribution, vibration damping, and electrical insulation, guaranteeing long-term stability and safety of the track system.
GNEE RAIL can provide quality and safe rail fastening system for different rail track. We can offer Clip Type Fastening System, SKL Rail Fastening System, KPO Rail Fastening System, Spring Blade Fastening whether for high speed rail track, normal rail or subway.
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