Description
Technical Parameters
Railway Shoulder - Technical Specification & Identification
| Parameter | Description & Details |
|---|---|
| Product Name | Railway Shoulder (or Rail Fastening Shoulder) |
| Common Names | Shoulder, Insulated Shoulder, Shoulder Insert, Shoulder Guide |
| Primary Function | To provide a stable, durable, and often insulated anchorage point for the rail fastening clip on a concrete sleeper. |
| Compatible System | Must be part of a matched fastening system (e.g., Pandrol Fastclip, Vossloh SKL, Nabla). |
| Standard Material | Glass-Filled Nylon (Polyamide) or Polyamide for excellent strength, durability, and electrical insulation. |
| Alternative Materials | Ductile Iron or Cast Steel for non-insulated, high-impact applications (less common on modern mainlines). |
| Material Standard | European: EN 13146 (Test methods for fastening systems) |
Railway Shoulder - Application, Handling & Comparison
| Aspect | Details |
|---|---|
| How it Works | The shoulder is pre-set into the concrete sleeper during manufacturing. It provides a precise "pocket" or guide for the rail clip to be inserted into and lever against, transferring the clip's spring force down into the massive sleeper. |
| Installation Method | Cast-in during sleeper fabrication. The shoulder is placed in the mold, and concrete is poured around it, forming a permanent, monolithic bond. |
| Key Advantages | - Provides Clip Anchorage: Essential for transferring immense clip forces into the sleeper. - Electrical Insulation: Critical for blocking current flow between the rail and ground, enabling track circuit signaling. - Precises Gauge Control: Helps maintain the exact distance between rails. - Corrosion Resistance: Polymer shoulders are immune to rust. |
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