Gnee Steel (Tianjin) Co., Ltd. is one of the most reliable manufacturers and suppliers of wj-8 high-speed fastening system in China, also supports customized service with low price. Please feel free to buy cheap wj-8 high-speed fastening system made in China here from our factory.
Product Introduction
As a key technical equipment to achieve reliable connection between rails and sleepers, the railway fastener system is composed of a variety of components with different functions, and plays a vital role in railway tracks. There are many categories, including the well-known SKL, KPO, Nabla, WJ-8 and other types.
The gussets of the KPO gusset fastener system are made of high-strength carbon steel, and after surface hardening treatment, the wear resistance and deformation resistance are enhanced. They are fastened to the sleepers through matching bolts and nuts, which are suitable for daily operation of ordinary railways. Installation and maintenance are relatively simple.
The WJ-8 fastener system is used for high-speed railways. The spring bar is made of advanced high-strength spring steel and undergoes a special heat treatment process to improve its fatigue life and buckle pressure stability; the insulating gauge block uses high-performance insulating materials to ensure effective isolation of current in the electrified railway environment and ensure the safe operation of the track system.
WJ-8 railway fastener system is an important member of the high-speed railway fastener system, mainly suitable for ballastless track structure with shoulder guard. Its components are rich and diverse, and each component performs its own function to jointly ensure the stable operation of the track.
The spiral spike passes through the spring bar, iron pad and other components from top to bottom and screws into the embedded sleeve to apply stable buckling pressure to the spring bar; the spring bar provides the force to tighten the rail, and the rail pad is placed under the rail to provide the main elasticity and transfer the train pressure to the cast steel pad. The iron pad bears the vertical, lateral and longitudinal forces transmitted from the spring bar and the rail pad, and transmits the vertical force to the ballastless track through the rubber pad below or the height adjustment pad, and the lateral force is transmitted to the shoulder guard through the gauge block.
Product Specifications
WJ-8 Rail Fastening System Technical Requirements
| Category | Technical Requirement |
|---|---|
| System Type | WJ-8 elastic rail fastening system for concrete sleepers, ballasted track |
| Applicable Rail Sections | 50KG, 60KG, UIC50, UIC54, UIC60 (60E1) |
| Design Axle Load | ≤ 25 t |
| Fastening Unit Composition | 2 × W-type elastic clips, 2 × insulating guide plates, 1 × rail pad, 2 × embedded shoulders |
| Clip Material | Spring steel 60Si2Mn / 55CrSi or equivalent |
| Clip Heat Treatment | Quenched and tempered |
| Clip Tensile Strength | ≥ 1500 MPa |
| Clip Yield Strength | ≥ 1300 MPa |
| Clip Elastic Deflection | 9–12 mm without permanent deformation |
| Static Toe Load (per clip) | 9–12 kN |
| Total Clamping Force (per rail seat) | 18–24 kN |
| Vertical Stiffness (system) | 30–50 kN/mm (with rail pad) |
| Lateral Resistance (per rail seat) | ≥ 9 kN |
| Longitudinal Resistance (per rail seat) | ≥ 11 kN |
| Rail Uplift Resistance | ≥ 8 kN |
| Fatigue Life (clip) | ≥ 5 million load cycles |
| Fatigue Life (assembly) | ≥ 3 million load cycles without functional degradation |
| Rail Pad Material | High-elastic rubber or EVA composite |
| Rail Pad Thickness | 8–10 mm |
| Rail Pad Static Stiffness | 60–100 kN/mm |
| Insulating Components | Nylon PA6 / PA66 or reinforced composite, UV- and aging-resistant |
| Electrical Insulation Resistance | ≥ 5 kΩ (dry), ≥ 3 kΩ (wet) |
| Dimensional Tolerance | In accordance with GB / EN fastening interface requirements |
| Corrosion Protection (clips) | Black oxide, HDG, or Dacromet, according to environment |
| Environmental Adaptability | No cracking, loss of toe load, or insulation failure after −40°C to +70°C cycling |
| Installation Requirement | Compatible with manual and mechanized clip installation tools |
| Maintenance Requirement | Individual component replacement without rail removal |
| Quality Control | Material certificates, mechanical test reports, and fatigue test verification required |
GNEE RAIL is a professional trader of railway fasteners with 15 years of export experience. We have established a "digitalization + localization" service system, strictly implement the latest international standards for our products, and innovatively develop an intelligent order management system to achieve digitalization of the entire trade process.
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