Description
Technical Parameters
Rail Screw Spike Fastening System
The screw spike replaces driven spikes in modern concrete sleeper tracks. It engages a plastic dowel cast into the sleeper using rotational force from a power tool. The forged head accepts standard railway wrenches while the tapered thread ensures gradual engagement. This fastener enables precise clamping force control without impact damage to concrete.
Technical Specifications:
| Parameter | Requirement | Typical Value |
|---|---|---|
| Material standard | EN or ASTM | EN 14545 / ASTM A1010 |
| Thread direction | Right hand only | Standard clockwise tightening |
| Head height | Above bearing surface | 12 mm – 16 mm |
| Underhead fillet | Radius dimension | 2 mm minimum |
| Surface hardness | Case or core | 30 – 38 HRC |
| Electroplated coating | Thickness range | 8 – 12 microns zinc |
| Installation temperature | Allowed range | -20°C to +50°C |
| Storage life | Unused in packaging | 5 years minimum |
Installation & Maintenance Perspective:
- Self-tapping thread form cuts into plastic dowel on first installation pass
- Asymmetric thread profile resists backing out under dynamic rail vibration
- Blunt tip prevents bottoming damage against dowel cavity end surface
- Thread root radius reduces stress concentration compared to sharp corners
- Lead taper allows finger starting before power tool final tightening
Maintenance & Operational Perspective
- Zero creep reported after fifteen years service on Japanese Shinkansen lines
- Survives switch and crossing impacts where driven spikes loosen within months
- Performs equally in desert heat and arctic freezing without torque loss
- Retains 80 percent of original pull-out value after five removal cycles
- No documented case of thread stripping when installed to specified torque
Gnee Professional supplier
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