Description
Technical Parameters
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Rail screw spike Fastening System
Railway Screw Spikes are threaded fasteners manufactured from high-strength steel, featuring a conical head with drive recess and a continuous helical thread that terminates in a blunt or pointed tip. Unlike conventional spikes that rely on friction, these components develop holding power through mechanical thread engagement with timber fibers or pre-installed synthetic dowels, transforming rotational torque into sustained clamping force for rail fixation.
Technical Specifications:
| Parameter | Timber Screw | Concrete Dowel | Concrete Insert |
|---|---|---|---|
| Engagement Medium | Wood fibers | Plastic dowel | Steel casting |
| Pull-out Resistance | 20-30 kN | 30-45 kN | 50-70 kN |
| Installation Method | Direct drive | Thread forming | Machine thread |
| Removal Cycles | 2-3 times | 5-10 times | Unlimited |
| Corrosion Risk | Surface only | Isolated by plastic | Galvanic potential |
| Replacement Cost | New spike only | Dowel + spike | Insert only |
Installation & Maintenance Perspective:
- Installation torque correlates directly with achieved clamp load
- Torque-to-yield relationships established for each material grade
- Lubricated threads provide 15-20% more consistent tension
- Breakaway torque indicates remaining holding capacity
- Over-torque protection prevents thread stripping failures
Maintenance & Operational Perspective
- Synthetic dowels in concrete receive screw threads directly
- Coiled wire inserts provide renewable thread engagement
- Epoxy-grouted dowels offer corrosion-isolated fixation
- Pre-threaded cast inserts accept machine-grade screws
- Dowel extraction tools enable replacement without sleeper damage
Gnee Professional supplier
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