The function of a fastening system is to securely anchor steel rails to railway sleepers or ties, ensuring the safety and smooth operation of railway tracks. There are many types of rail clips.
GNEE RAIL can provide various types of railway fastener systems and railway fasteners, such as skl rail clip fastening system, kpo rail clamp fasteners system, e type elastic clip fasteners system, fast rail clip fixing system, fist railway tension clip fastening system, etc., rail clip, screw spike, dog spike, rail fash plate, rail bolt and nut, railway tie plate, rail elastic rubber pad, rail anchor, railroad gauge tod, etc.
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The Nabla clip rail fastening system finds extensive use in railway construction across various countries, particularly in regions such as Europe and Africa. It is especially prevalent in urban tram systems, light rail, subways, mainline railways, and high-speed rail networks. This versatility has established the Nabla fastening system as the preferred choice within the railway industry.
Structurally, the Nabla clip rail fastening system comprises Nabla clips, which securely and stably fasten the steel rails to railway sleepers with the appropriate clamping force. Additionally, the system includes insulators, sometimes referred to as guide plates, which ensure electrical insulation. Rail spikes are employed to securely fix various components in place, along with washers and other essential elements that play vital roles throughout the system.
| Item included | Quantity | Material | Size | Remark |
| Nabla clip | 2 | 60Si2MnA, 60Si2CrA | 4mm or 4.5mm thick | 42-47HRC 3 million times without breaking; Application for different rail type |
| Insulator | 2 | 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 | 2 | 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 | 2 | 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 Specification of Nabla Rail Clip
| Name | Nabla Rail Clip | |||
| Material | 60Si2MnA | 60Si2CrA | 55Si2Mn | 38Si7 |
| Chemical Composition(%) | C: 0.56-0.64,Mn: 0.60-2.00,Si: 1.60-2.00,Cr:≤0.35,P:≤0.03,S:≤0.03 | C: 0.56-0.64,Mn: 0.40-0.07,Si: 1.40-1.80,Cr:0.70-1.00,1.00P≤0.03,S:≤0.03 | C: 0.56-0.60,Mn: 0.60-0.90,Si: 1.50-2.00,Cr:≤0.35,P:≤0.03,S:≤0.03 | C: 0.35-0.42,Mn: 0.50-0.80,Si: 1.50-1.80,P:≤0.03,S:≤0.03 |
| Fatigue Life | For Dia. 18 is 3 millions cycles without breaking | |||
| For Dia. 20 is 5 millions cycles without breaking | ||||
| Surface | Plain(oiled), Oxide black, Color painting, HDG, Zinc Plating | |||
| Standard Refers | DIN17221, BS970, GB/T1222 | |||