The Type II railway fastening system is a key component in track structures, primarily used to secure rails to concrete sleepers and ensure safe, smooth train operation. It stands out in its components, working principles, performance characteristics, and application scenarios.
System Components
The Type II fastening system mainly consists of elastic clips, spiral spikes, gauge retainers, retainer seats, and elastic rubber padding plates:
Elastic Clips: Made of 60Si2CrVA steel, they offer strong elasticity and clamping force (10kN per clip with a 10mm stroke), firmly gripping rails to prevent displacement during operation.
Spiral Spikes: Fix the system to sleepers, ensuring stable connections.
Gauge Retainers & Seats: Adjust track gauge for different laying needs. Gauge can be fine-tuned by replacing retainers of different sizes.
Elastic Rubber Padding Plates: Placed between rails and sleepers, they insulate track circuits to prevent current leakage, buffer impact forces, reduce wear, and extend component lifespan.
Working Principles
Elastic clips generate clamping force through elastic deformation, resisting longitudinal/transverse forces from trains to maintain gauge accuracy.
Spiral spikes provide fastening force to secure all components.
Gauge retainers and seats work together to adjust and fix the gauge as designed.
Rubber pads buffer vibrations, reduce noise, and ensure electrical insulation.
Performance Features
Strong clamping force and high stability, suitable for higher-speed trains.
Excellent insulation meets modern railway signaling requirements.
Effective shock absorption from rubber pads minimizes track damage and enhances durability.
| Performance of Type II Rail Clip | |
| Fastener name/performance index | Type II Rail Clip |
| Initial buckling force of a single spring clip (KN) | ≥10 |
| Deformation of spring clip (mm) | 10 |
| Longitudinal anchor resistance (KN) | 16 |
| Vertical static stiffness of buckling node (KN/mm) | 60~80 |
| Gauge adjustment amount (mm) | -8~+12 |
| Height adjustment amount (mm) | ≤10 |
Application Scenarios
The system is suitable for standard-gauge railways on straight tracks and curves with radii ≥300m, connecting 60kg/m rails to pre-stressed concrete sleepers or wide concrete sleepers. It is widely used in:
Ordinary mainline railways
Ground and elevated lines in urban rail transit
It plays a vital role in ensuring safe and stable rail transportation.GNEE RAIL is a professional company focusing on international trade of railway fasteners, mainly supplying various types of rail fasteners, connecting bolts, elastic gaskets and other products. We have a stable production base and a professional quality inspection team to ensure that each batch of products meets international railway industry standards. After years of development, we have established a complete export service system, which can provide customers with full-process services from product selection, quality control to logistics and transportation.