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Type III Railway Fastening System
The Type III Railway Fastening System is a modern, boltless, and shoulder-less, elastic clip fastening system designed for heavy-haul, high-density, and high-speed railway lines. It utilizes cast-in shoulders, Type III elastic clips (often w-shaped), and insulation components to secure rails to concrete sleepers with high clamping force, excellent elasticity, and minimal maintenance.
Type III Railway Fastening System components
| Type | Product | Specification | Standard/Drawing | Unit | Q'ty |
| Type-III Rail Fastening System | rail clip | III | special line (01)3328-3 | Pcs | 2 |
| rail shoulder | IIIb | special line (01)3328-4 | Pcs | 2 | |
| Insulating gauge block | 9#/11# | special line (01)3328-6 | Pcs | 2 | |
| rubber pad | IIIb | special line(01)3328-5 | Pcs |
1 |
Features of Type III elastic fasteners system
High Performance: Provides significant buckle pressure (>11kN) per single elastic clip) and a working deformation of 13mm, ensuring robust clamping.
Reduced Maintenance: Characterized by a compact structure with fewer components, which lowers the need for regular maintenance.
Material Strength: Uses high-strength materials (e.g., 60Si2CrA, 38Si7 steel) for the clip, designed for high fatigue resistance, though susceptible to corrosion.
Installation Precision: The center leg insertion length should be carefully controlled (typically 69mm to 76mm) to avoid excessive stress concentrations and potential fracture.
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