Description
Technical Parameters
Rail Screw Spike Fastening System
The Railway Screw Spike (also known as tire-fond in French) is a threaded steel fastener designed to secure rails to wooden sleepers or concrete sleepers with plastic dowels, featuring a helical thread that provides superior pull-out resistance compared to non-threaded alternatives . Manufactured from carbon steel grades including Q235, 35#, 45#, 40Mn2, and 20MnSi, with property classes ranging from 4.6 to 8.8, these spikes achieve tensile strength of 400–800 MPa depending on specification .
Technical Specifications:
| Parameter | Standard Grade | High-Strength Grade | Heavy-Haul Grade | High-Speed Rail Grade |
|---|---|---|---|---|
| Material Grade | Q235 / 35# | 45# | 40Mn2 | 20MnSi |
| Property Class | 4.6 | 5.6 | 8.8 | 5.6 / 8.8 |
| Tensile Strength | ≥400 MPa | ≥500 MPa | ≥800 MPa | ≥500–800 MPa |
| Pull-Out Resistance | Baseline | 0.5–1.0× higher than dog spikes | Maximum | Superior to standard |
| Lateral (Thrust) Resistance | Standard | 50% lower than dog spikes | Enhanced design | Optimized |
| Seismic Performance | Moderate | Good | Excellent | Superior |
| Typical Application | General purpose | Medium-load lines | Heavy-haul, mountain railways | High-speed railways |
Installation & Maintenance Perspective:
- Threaded spikes disperse and absorb vibrations generated by trains, particularly in high-demand track systems such as high-speed railways and heavy-load railways
- The thread structure provides a locking effect that prevents loosening due to train-induced vibrations and impacts, maintaining track stability over long-term use
- Significantly improves seismic performance of the track, ensuring smoothness and safety of train travel in earthquake-prone regions
- Superior anti-loosening performance compared to dog spikes makes them ideal for mountainous railway sections with challenging terrain
Maintenance & Operational Perspective
- Threaded structures typically have a long service life; tightening effect can be maintained for extended periods during railway operation
- Reduces frequency of loosening compared to friction-dependent fasteners, thereby lowering maintenance and replacement costs over lifecycle
- High shear resistance, greater durability, and longer maintenance intervals compared to dog spikes
- Reusability advantage: screw spikes can be removed and reinstalled, unlike dog spikes which sustain damage during extraction
Gnee Professional supplier
Hot Tags: rail screw spikes for light rail fixing, China rail screw spikes for light rail fixing manufacturers, suppliers, factory
