Nabla Blade with NF F50-015 Standard

The Nabla blade (also known as a Nabla clip or Nabla plate) is a key component of the Nabla rail fastening system, which is widely used on railways in France and Africa, including high-speed TGV lines. The blade is manufactured from alloy spring steel and must comply with the NF F50-015 standard. 

Key Features

• Function: The special shape of the Nabla blade creates a stable toe load on the rails when torqued with a high-strength bolt and nut. It is an elastic rail clip designed to provide consistent clamping force and resistance to movement caused by passing trains.

• Material: It is made of alloy spring steel, adhering to the material specifications outlined in the French national standard NF F50-015. In China, common material grades include 60Si2MnA, 60Si2CrA, 55Si2Mn, and 38Si7.

• Shape: It is shaped like a thick trapezoidal shovel with a round hole in the middle.

• Performance: The clip has high hardness (typically HRC51-55) and a load of approximately 2500 DaN. It is known for its elasticity and fatigue resistance, maintaining its height and load after repeated testing.

• Compliance: While the blade itself follows the NF F50-015 material standard, the complete Nabla fastening system is compliant with the broader European standard EN13481-5. 

System Components

The complete Nabla fastening system includes: 

• Nabla blade: The elastic component that provides clamping force.

• Insulator (support pad): A specially designed component to insulate the clip from the rail.

• High-strength bolt with nut and washer: Used to secure the system, often a double-end bolt pressed into a concrete sleeper. 

Trusted Supplier of The Nabla Blade

• Kunshan Signum Machinery Technology Co., Ltd. is a trusted supplier of the Nabla Blade, meeting the NF F50-015 Standard for railway and transportation infrastructure.

• With years of experience in providing high-quality rail fastening components, Signum specializes in offering Nabla Blades that conform to the strict requirements of the NF F50-015 standard, ensuring optimal performance and safety in rail applications.

• Our Nabla Blades are engineered for precision and reliability, and we ensure that all our products undergo rigorous quality control to meet international standards. The NF F50-015 standard is known for its comprehensive specifications on durability and safety, making our blades an excellent choice for rail networks requiring high-performance solutions.

• As a dedicated supplier, we offer both competitive pricing and reliable delivery. Our commitment to customer satisfaction and adherence to industry standards has made us a trusted partner in the rail sector.