Description
Technical Parameters
Rail Screw Spike Fastening System
The Railway Screw Spike is a precision-threaded fastener forged from high-strength alloy steel, engineered for securing rail base plates to timber and composite sleepers. The helical thread profile creates positive mechanical interlock with the substrate, delivering superior pull-out resistance. The forged drive head accommodates high-torque installation while enabling non-destructive removal for track maintenance and component reuse.
Technical Specifications:
| Parameter | Specification | Performance Indicator |
|---|---|---|
| Thread Formation | Rolled thread | Compressive residual stress profile |
| Material Grade | Alloy steel | 4140, 4340, or equivalent |
| Corrosion Protection | Hot-dip or mechanical galvanized | 500–1,000 hours salt spray |
| Installation Tool | Hydraulic driver or torque wrench | 200–400 Nm typical range |
| Traceability | Laser-marked lot numbers | Complete material genealogy |
Installation & Maintenance Perspective:
- Asymmetric thread profile optimizes load transfer during tension while facilitating clean chip evacuation during installation.
- Root radius design eliminates stress concentration points that would initiate fatigue cracks under cyclic loading.
- Self-locking helix angle ensures frictional resistance exceeds back-drive tendency without supplemental locking devices.
- Progressive thread depth from tip to head provides graduated engagement that centers the fastener during insertion.
Maintenance & Operational Perspective
- Hot-dip galvanizing provides cathodic protection with coating thickness maintained on thread flanks.
- Mechanical galvanizing eliminates hydrogen embrittlement risk associated with electroplated coatings.
- Polymer topcoats reduce installation friction while providing chemical resistance for specialized applications.
- Coating systems are formulated for compatibility with creosote and copper-based wood preservatives.
Gnee Professional supplier
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