Rail skl Clip Fastening System

The SKL clip is a non-threaded elastic rail fastener with a distinctive double-coil spring body. Made from high-grade spring steel, it generates constant toe load through elastic deflection. The clip works with an angled guide plate and a screw spike to hold the rail foot securely against concrete sleepers. It is a standard fastening system for modern high-speed and heavy-haul railways.
Technical Specifications:
| Parameter | Standard Requirement | Typical Value |
|---|---|---|
| Clip type family | SKL series | SKL-12 / SKL-14 / SKL-21 |
| Wire diameter | Spring steel bar | 13.0 mm ± 0.2 mm |
| Steel grade | EN 10089 standard | 60Si2CrA / 51CrV4 |
| Surface protection | Anti-corrosion coating | Zinc plated / Oxide black |
| Installation deflection | Working spring travel | 11 mm ± 1 mm |
| Minimum toe load | At specified deflection | 10 kN per clip |
| Maximum toe load | At specified deflection | 14 kN per clip |
| Fatigue requirement | Without fracture | 5 million cycles |

Installation & Maintenance Perspective:
- Fits directly into cast shoulders without requiring special rail adapters
- Works with most international rail profiles including UIC54 and UIC60
- Requires specific guide plate angle matching the rail base slope
- Compatible with both insulated and non-insulated fastening assemblies
- Standard components fit across multiple sleeper types from different suppliers
Maintenance & Operational Perspective
- Provides continuous clamping under extreme temperature changes from -40°C to +60°C
- Absorbs both vertical wheel loads and lateral track forces simultaneously
- Maintains electrical resistance when used with insulated guide plates
- Resists permanent deformation even after repeated heavy axle passes
- Does not loosen under vibration unlike bolted mechanical connections

Gnee Professional supplier


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