The nabla rail fastening system is extensively used on French TGV High-Speed lines. The nabla Clip generates its clamping force by tightening the nut in a controlled degree.It can be used in Tram, LRT, Metro, Main Line and High Speed tracks.
The Nabla fastening system consists the following items:
| Nabla Clip | Insulator | Screw Spike | Spring Washer | |
| Quantity | 2 | 2 | 2 | 2 |
| Material | 60Si2MnA, 60Si2CrA | Reinforced Nylon 66 (PA66) | Grade5.6:35# | ML08AI |
| Size | 4mm or 4.5mm thick | - | - | 18.25x34x78mm |
| Technical Specification | Hardness:42-47HRC | Density:1.3-1.45g/cm³ | Tensile Strength:≥500Mpa | Chemical Composition(%): |
| 3 million times without breaking | Tensile Strength:≥170Mpa Elongation:≤4.4% | C:0.05-0.10, Mn:0.30-0.60, Si:≤0.1, Cr:≤0.2, P:≤0.035, S:≤0.035 | ||
| Bending Strength:≥250Mpa | Yield Strength:≥300Mpa | |||
| Impact Strength (No gap):≥80KJ/m² | ||||
| Melting Point:250-270ºC | Elongation:≥20% | |||
| Insultion Resistance:≥1X10^8Ω | ||||
| Glass Fiber Content:30-35% Hardness:≥110HRR | Cold Bending:90 degree without crack |
Nabla Rail Fasteners Technical Parameters
| Part name | Type | Material | Finish | Remark |
| Nabla clip | Thickness 4mm or 4.5mm | 60Si2MnA, 60Si2CrA | Plain oiled, red color painting, or the other required by customers | Hardness: 42-47HRCFatigue |
| life: 3 millions cycles without breaking | ||||
| Standard: DIN17221, GB/T1222 | ||||
| Insulator | UIC54, UIC60, S49 rails | Reinforced Nylon 66 (PA66) | Black, blue, yellow, green or other colors | Different designs are available. |
| Double head screw spike | UIC54, UIC60, 50kg rail, 60kg rail | Grade 5.6: 35# | Plain oiled, black oxide, galvanized, hot dip galvanized | Bending at 30 degree without crack. |
| Special spring washer | 18.25x34x78mm | ML08Al | Plain oiled, black oxide, galvanized, hot dip galvanized | For protecting the thread of the double end screw spike |
| Hex nut | As ordered | Grade 5: 35# | Plain oiled, black oxide, galvanized, hot dip galvanized | Standard: DIN985 |
| Plain washer | As ordered | Q235 | Plain oiled, black oxide, galvanized, hot dip galvanized | Standard: DIN125 |
GNEE RAILWAY RAILWAYL specializes in the research, development and production of railway fastening systems, with products covering high-speed rail, conventional rail and urban rail transit sectors. We supply various railway fasteners and complete fastening systems including elastic rail clips, rail pads, gauge rods, bolts & nuts, fishplates, etc. For product compatibility inquiries or bulk procurement requirements, please feel free to contact GNEE RAILWAY at any time.
