Rail Clip for NABLA C1 Fastening System

The rail clip for the Nabla C1 fastening system is a specific type of flat steel elastic clip (often referred to as a "Nabla blade") designed to provide a high, dynamically stable toe load on the rail. 

Clip Details

• Material: The clip is made from hot-rolled spring steel, such as 60Si2Mn or 60Si2Cr grades.

• Dimensions: It is typically available in thicknesses of 4mm or 4.5mm, depending on the specific application requirements.

• Performance: The design is engineered for a high fatigue life, tested up to 200 million load cycles without failure, making it suitable for high-speed, heavy haul, and urban transit systems.

• Standard: The Nabla C1 clip complies with the French national standard NF F 50-015. 

System Components

The Nabla C1 clip is part of a complete assembly designed to secure the rail to the sleeper. For each sleeper, the system typically requires four C1 clips and other key components: 

• Nylon Insulators/Rail Gauge Baffles: Provide electrical insulation and gauge control.

• Screw Spikes/Anchor Screws: Secure the entire assembly to the concrete sleeper.

• Rail Pad: A rubber or polyurethane cushion placed between the rail and the sleeper to absorb vibration and noise.

• Nylon Dowel/Concrete Insert: A plastic insert set into the concrete sleeper to provide a secure anchor point for the screw spike.