Rail Screw Spike Fastening System
The Railway Screw Spike is a threaded fastener that secures rails to wooden or composite sleepers through mechanical interlock. Its coarse square thread and gimlet point allow self-tapping installation without pre-drilling. Made from heat-treated medium carbon steel, this spike delivers superior pull-out resistance compared to traditional dog spikes. Ideal for heavy-haul lines, sharp curves, and grade crossings, the screw spike maintains clamping force under vibration and requires minimal maintenance over decades of service.
Technical Specifications:
| Parameter | Value | Note |
|---|---|---|
| Material | 45# / 1045 steel | Medium carbon |
| Hardness | HRC 28 – 35 | Quenched & tempered |
| Thread type | Square | Coarse pitch |
| Length | 150 – 200 | mm |
| Shank diameter | 22 – 25 | mm |
| Point | Gimlet | Self-boring |
| Finish | Hot-dip galvanized | Standard |
| Pull-out force | 25 – 35 | kN |
| Torque | 400 – 500 | Nm |
| Standard | AREMA / EN | Various |
Installation & Maintenance Perspective:
- Coarse square thread maximizes wood fiber contact for better grip.
- Self-tapping tip eliminates need for pre-drilled pilot holes.
- Thread depth decreases gradually toward point for smooth starting.
- Helical angle optimizes insertion speed while maintaining holding power.
- Thread crests compress rather than cut surrounding wood fibers.
Maintenance & Operational Perspective
- Hammer sets spike initially before final torque wrench tightening.
- Calibrated torque ensures consistent clamping force across all spikes.
- Impact wrench speeds installation on large-scale track projects.
- Over-torque protection prevents thread stripping in soft wood.
- Installation records verify proper force for quality assurance.
Gnee Professional supplier
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