Vossloh SKL 14 Screw Spike | Railway Fasteners Manufacturer

The Vossloh SKL 14 screw spike is a key component of the W 14 rail fastening system, used to secure rails to concrete or wooden sleepers in conventional, high-speed, and heavy haul tracks globally. The screw spike itself is typically made of high-strength steel and has a threaded design, which allows it to be screwed into the sleeper, ensuring a secure and long-lasting connection.

Material and Specifications

The screw spike is typically made from high-strength steel with various available grades and surface treatments for enhanced durability and corrosion resistance. 

• Material Grades: Common materials include Grade 4.6 (Q235), Grade 5.6 (35#), and Grade 8.8 (45#) steel, depending on the required strength.

• Dimensions: Typical sizes include M24×150mm, M24×160mm, and M24×180mm, or lengths as ordered.

• Head Style: It typically features a square head.

• Surface Treatment: Options for corrosion protection include plain oiled, black oxide, galvanized, hot dip galvanized, Dacromet, and sherardized finishes.

• Standards: The screw spikes are manufactured to international standards, such as ISO898-1, UIC864-1, and NF F50-006. 

Key Assembly Components

A standard SKL 14 (System W 14) assembly consists of the following: 

• Skl 14 Tension Clamp: A W-shaped spring steel clip that provides constant toe load on the rail foot.

• Ss 35 (or Ss 25) Screw Spike: The vertical fastener that threads through the assembly into the sleeper.

• Angled Guide Plate (Wfp 14 K): Maintains the rail's lateral position and transfers forces to the concrete sleeper.

• Rail Pad (Zw): An elastic elastomer pad placed under the rail to dampen vibrations and reduce noise.

• Plastic Dowel (Sdü): Inserted into the concrete sleeper to receive the screw spike. 

Installation Highlights

• Torque Requirement: The system is typically tightened to a torque of approximately 200–250 Nm.

• Visual Confirmation: Correct fitting is achieved when the middle bend of the Skl 14 clamp is in contact with the rib of the angled guide plate.

• Toe Load: Provides a constant toe load of approximately 9 kN with a spring deflection of roughly 12 mm. 

Features and Benefits

• High Elasticity and Durability: The screw spike works in conjunction with the Skl 14 tension clamp and rail pad, which use the cellentic elastomer to provide high elasticity and damp vibrations, increasing the life of track components and enhancing travel comfort.

• Optimal Rail Positioning: Angled guide plates direct forces into the sleeper or base plate, preventing the screw spike combination from being loaded by shearing and bending forces, which helps maintain gauge and prevents rail tilting.

• Maintenance-Free: The design ensures permanent resilient tension, meaning the Skl 14 tension clamp and the screw spike do not loosen, making the system virtually maintenance-free.

• Versatile Application: The system is highly adaptable for various applications, including conventional rail (up to 26 t axle load, 250 km/h speed), high-speed lines (up to 320 km/h), and heavy haul traffic (up to 35 t axle load), by optimizing the specific components.

• Easy Installation: The system allows for pre-assembly in the sleeper factory, which makes installation on-site faster and easier. 

AS a leading manufacturer and supplier of high-quality railway fastening solutions, Signum Rail specializes in the production of Vossloh SKL 14 Screw Spikes, a key component in the renowned Vossloh SKL 14 fastening system used in railway track installations.

Our Vossloh SKL 14 screw spikes are crafted from premium-grade steel, ensuring superior durability, strength, and corrosion resistance. Designed to meet international railway standards, our products provide secure and stable rail fastening, ensuring the safety and reliability of railway infrastructure.

We look forward to being your reliable partner for railroad screw spikes and track fastener solutions.