NABLA C1 Fastening System

The NABLA C1 Fastening System is a robust, standard railway component used to securely attach rails to sleepers (ties), providing essential stability, vibration dampening, and precise alignment for heavy loads and high-speed trains. It's a type of elastic fastening system, featuring the distinct NABLA C1 clip (a spring steel fastener), insulators (guide plates), rail pads, anchor screws, and washers, designed for reliable performance and easier maintenance on various track types, from metros to high-speed lines. 

Key Components

1. NABLA C1 Clip: Made from alloy spring steel, it provides the primary clamping force, preventing rail movement.

2. Insulator (Guide Plate): Plastic component that electrically insulates the rail and helps maintain gauge.

3. Rail Pad: Placed between the rail and sleeper to absorb shock, vibration, and noise.

4. Anchor Screw & Washer: Fastens the system to the sleeper, often a concrete one.

5. Concrete Insert: A fitting cast into the concrete sleeper for the screw to engage. 

Standard and Application

1.Execution Standard: EN 13481-2, Category C.

2.Applicability: Compatible with any I-section rail, meeting requirements for track operating conditions and gauge specifications.

System Description

The NABLA C1 Fastening System is a type of rail fastening system designed to secure rails to sleepers (especially concrete sleepers) in railway track structures. It belongs to the broader class of Nabla-type fastening systems, which are widely used in Europe and elsewhere for both mainline and light-rail applications.

Configuration Table and Description of Fastener Components for Individual Sleeper

Indicators of NABLA C1 Rail Clip Fastening System

Execution Standards:EN 13481-2,Railway applications – Rail -Performance Indicators of fastening system concrete sleepers fastening system.