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As a leading manufacturer of high-quality railway fastening solutions, Kunshan Signum Machinery Technology Co.,Ltd is proud to present the 3V screw spike(also know as 3V Sleeper Screw), a product engineered to deliver exceptional holding power, corrosion resistance, and long-lasting performance for railway track systems.
The 3V screw spike is a specific type of railway screw spike used to secure the rails to railway ties (both wooden and concrete) with enhanced stability and long-lasting performance. Below are the technical specifications of the 3V screw spike, including details on materials, dimensions, and other relevant features.
1. Material Specifications
1. Material Specifications
Base Material: Typically made from high-carbon steel (e.g., AISI 1045 or AISI 1060) or alloy steel (such as 35#,45#,40Cr, 42CrMo, or 60Si2Mn), which provides excellent tensile strength, wear resistance, and fatigue resistance.
Coating/Finish: Often galvanized (e.g., hot-dip galvanizing) or coated with zinc for enhanced corrosion resistance. The coating protects the spike from environmental factors like moisture, road salts, and extreme temperatures, which helps extend its service life.
Zinc Coating Thickness: Typically around 50-100 microns (depending on the coating method), but this can vary based on specific project requirements.
Hardness: Typically in the range of 250-350 HB (Hardness Brinell) depending on material composition and heat treatment.
2. Dimensions and Size
2. Dimensions and Size
The exact dimensions of the 3V screw spike may vary depending on the specific design and manufacturer, but here are typical ranges for its specifications:
Length: The length of the 3V screw spike is usually between 125 mm and 200 mm (5 in to 8 in), though longer spikes can be used for heavier-duty applications or where additional depth is needed for installation into ties.
Diameter of Shaft: The diameter of the shaft typically ranges from 14 mm to 20 mm (0.55 in to 0.79 in), though this can vary depending on the specific needs of the track system and the type of rail and tie used.
Thread Pitch: The pitch of the thread is usually between 2 mm and 4 mm depending on the exact threading geometry, with the 3V configuration offering a unique triangular thread profile designed for enhanced grip and resistance to loosening.
The angle of the triangular thread is typically around 60°.
3. Thread Design and Geometry
3. Thread Design and Geometry
3V Thread Profile: The 3V screw spike features a triangular (3V) thread design, meaning the thread geometry forms an angle of about 60°. This design increases the grip on the tie, preventing the spike from loosening due to vibrations or dynamic forces from passing trains.
Helical Thread: The thread is helical, providing a progressive screw-in mechanism, which minimizes track movement and allows for a tighter fit, reducing the risk of rail misalignment.
Thread Depth: The depth of the thread on the spike is usually around 2 mm to 5 mm, depending on the size of the spike and the type of tie being used.
4. Installation and Removal
4. Installation and Removal
Installation Torque: The torque required to install the 3V screw spike typically ranges from 70 Nm to 120 Nm depending on the material of the tie (wood or concrete) and the type of installation equipment used.
The installation torque helps ensure the spike is securely fastened, providing the necessary clamping force to hold the rail in place.
Removal: The screw design of the 3V screw spike allows for easy removal using specialized tools such as screwdrivers or impact drivers, which simplifies track maintenance or replacement.
5. Load and Performance Characteristics
5. Load and Performance Characteristics
Tensile Strength: Typically ranges from 800 MPa to 1,200 MPa depending on the material. The high tensile strength of the 3V screw spike ensures it can withstand significant mechanical stresses, such as the forces generated by heavy freight or high-speed trains.
Fatigue Resistance: Designed to handle repeated loading and unloading, the 3V screw spike exhibits excellent fatigue resistance, meaning it can handle the constant vibration and dynamic forces that rail systems experience, particularly in high-traffic or high-speed applications.
Pullout Resistance: The 3V screw spike is designed to offer superior pullout resistance compared to conventional hammered spikes, particularly due to the helical thread design, which grips the tie material tightly.
The pullout resistance can vary depending on the tie material, but it is typically in the range of 30 kN to 40 kN for wooden ties and even higher for concrete ties.
6. Applications and Compatibility
6. Applications and Compatibility
Tie Compatibility: Suitable for use with wooden ties, concrete ties, and composite ties.
In wooden ties, the threads engage the wood fibers to create a secure anchor.
In concrete ties, the tapered shank and threaded design allow for a secure installation into pre-drilled holes in the concrete.
Rail Size Compatibility: Typically used with standard rail sizes such as 52 kg/m (P-50), 60 kg/m (P-60), and 65 kg/m (P-65) rails, but it can be adjusted for other rail types by modifying the spike’s length or thread design.
Environmental Resistance: Designed to work in harsh environmental conditions, including areas with extreme cold, moisture, salt, and temperature fluctuations. The corrosion-resistant coating (e.g., galvanization) ensures it maintains its integrity even in coastal or snow-prone regions.
7. Standards and Certifications
7. Standards and Certifications
The 3V screw spike typically complies with industry standards such as:
EN 13835 (European Standard for railway fasteners)
UIC 860 (International Union of Railways standard for fasteners)
ASTM A153 (Standard specification for zinc coatings on iron and steel products)
ISO 4042 (Standard for electroplated coatings and corrosion resistance)
8. Packaging and Delivery
8. Packaging and Delivery
Bulk Packaging: Typically supplied in bulk (such as pallets or steel drums) for easy transportation and handling, especially for large-scale railway construction projects.
Custom Orders: Custom sizes and finishes are available based on client specifications or particular rail system requirements.
The 3V screw spike is a high-performance railway fastening solution, engineered for strength, corrosion resistance, and reliability. With its superior thread design, fatigue resistance, and ability to perform in harsh environmental conditions, the 3V screw spike is ideal for modern rail systems requiring long-lasting track stability, especially in high-speed or heavy-duty freight applications. Its installation flexibility, combined with its robust material properties and corrosion-resistant finish, make it a top choice for rail infrastructure worldwide.
Kunshan Signum Machinery Technology Co.,Ltd is able to manufacture 3V screw spikes according to customers' requirements or drawing with competitive price.
Contact Us
Direct Line:+86 512 50353196
Whatsapp:+86 158 6266 4803
Email: admin@rail-fastening.com
Web: www.rail-fastening.com
Address: 120 Tongjing Road, Lujia Town, Kunshan, Jiangsu 215331, China
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