Description
Technical Parameters
Rail Screw Spike Fastening System
The Railway Screw Spike is a threaded fastener manufactured from heat-treated alloy steel, designed for securing rail to timber, composite, and engineered wood sleepers. Continuous helical threads create positive mechanical interlock with the substrate, providing superior withdrawal resistance. The forged drive head enables precise torque application, while the threaded configuration allows non-destructive removal and reuse through multiple maintenance cycles.
Technical Specifications:
| Parameter | Specification | Performance Indicator |
|---|---|---|
| Thread Formation | Rolled or precision cut | Rolled threads provide superior fatigue life |
| Material Grade | Heat-treated alloy steel | 4140, 1045, or equivalent |
| Drive Head | Square or hexagonal | 5/8 to 1 inch across flats |
| Installation Torque | Applied rotational force | 150–350 Nm typical range |
| Withdrawal Capacity | Ultimate pull-out | 12–20 kN in sound hardwood |
Installation & Maintenance Perspective:
- Coarse thread spacing maximizes material engagement in preservative-treated timber for optimal holding capacity.
- Deep thread profiles increase shear area between fastener and substrate, distributing withdrawal loads effectively.
- Tapered lead threads enable accurate engagement with pre-drilled pilot holes, preventing cross-threading.
- Thread crest radii reduce stress concentration in the substrate, preventing splitting in aged or brittle timber.
Maintenance & Operational Perspective
- Torque-to-tension relationships enable precise clamp force application using calibrated installation tools.
- Pre-drilling requirements are specified to balance installation ease with maximum withdrawal resistance.
- The drive head accepts both manual wrenches and high-production hydraulic multiple-spindle drivers.
- Post-installation torque auditing provides quantifiable verification of fastener tension.
Gnee Professional supplier
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