SKL Rail Fastening System

Item

SKL series elastic rail fastening system (SKL1, SKL3, SKL12, SKL14, SKL21, SKL15, SKLB15)

Material

60Si2Cr, 60Si2Mn, 55SiMn, 38Si7

Product properties

Hardness HRC 42-47，Fatigue life 3-5 million cycles

Surface

Plain Oiled, Oxygen Black, Zinc Plated, Hot Dip Galvanized, Dacro coating

Specification

SKL rail fastening system on sale

Part Name	Pcs / Set	Types	Material
SKL Tension Clip	2	SKL1, SKL3, SKL12, SKL14, SKL15,SKL21,SKL30	60Si2MnA / 60Si2CrA / 38Si7
Ss35 Screw Spike	2	M24×150mm	Grade 4.6: Q235
		M24 ×160mm	Grade 5.6: 35#
		M24×180mm	Grade 8.8: 45#
Flat Washer	2	Uls7	Q235
Plastic Dowel	2	For different sizes of screw spike	HDPE or Reinforced Nylon 66
Rail Pad	1	For UIC54, UIC60, 50kg rail, 60kg rail	HDPE / Rubber / EVA
Guide Plate	2	For UIC54, UIC60, 50kg rail, 60kg rail	Reinforced Nylon 66

Product Description

The SKL rail fastening system is a widely used elastic fastening system in modern railways. Its core function is to securely fix the rails to the sleepers or track slabs using high-performance elastic clips. According to search results, the system’s main function is to generate sufficient fastening force through the deformation of the elastic clips to prevent longitudinal and lateral displacement of the rails under load, thereby ensuring track stability and train safety.

SKL3, SKL12, and SKL14 are some common models in this series. A significant characteristic of SKL compared to some other systems is that it requires tightening bolts to achieve and maintain the designed fastening force.

Gnee not only offers the SKL rail fastening system but also provides KPO, Nabla, E clip and Chinese standard fastening systems. We also offer internationally standardized rail fasteners, including spikes, bolts, rail elastic clips, tie plates, rail pads, fishplates, etc.

Technical Specifications Of SKL Clips

The SKL series has multiple sub-models, such as SKL1, SKL2, SKL3, SKL12, SKL14, SKL15, SKL21, etc. The following is a comparison of specifications for some models:

Model	Application Scenario	Clamping Force (kN)	Maximum Axle Load (t)	Other Features
SKL1	Ballasted Track	~9-10	≤26	Simple and reliable, mature solution
SKL12	Conventional/High-speed Lines	~10	≤26	Good elasticity, strong anti-theft performance
SKL14	High-speed/Heavy-load Lines	~10-12	≤26	Used in turnout areas
SKL21	Light Rail/High-speed Lines	10	26	Resistant to repeated deformation ≥2.5mm

Additional information

Item	SKL series elastic rail fastening system (SKL1, SKL3, SKL12, SKL14, SKL21, SKL15, SKLB15)
Material	60Si2Cr, 60Si2Mn, 55SiMn, 38Si7
Product properties	Hardness HRC 42-47，Fatigue life 3-5 million cycles
Surface	Plain Oiled, Oxygen Black, Zinc Plated, Hot Dip Galvanized, Dacro coating

Application

High-Speed Railways and Passenger Dedicated Lines

SKL railway fastening systems provide constant and precise clamping force, effectively preventing slight rail displacement under high-speed dynamic loads and ensuring a highly smooth track foundation.

Heavy-Haul Freight Railways

The system’s high rigidity and excellent fatigue resistance design securely lock the rails, significantly reducing track structure settlement and deformation, and extending overhaul cycles.

Urban Rail Transit

While providing sufficient fastening performance, its highly standardized components facilitate rapid inspection, adjustment, or replacement, effectively controlling maintenance costs and operational disruptions throughout the entire lifecycle.

Small-Radius Curves and Long Gradient Sections

Strong lateral holding force effectively locks the rail position, significantly reducing unbalanced wear.

Bridges and Special Structure Tracks

SKL series fastening systems can achieve a balance between strong clamping force and appropriate elasticity through component adjustments, protecting bridge structures and ensuring traffic safety.

Harsh environments such as extreme cold and high temperatures

Made with high-performance materials, the system maintains stable performance over a wide temperature range, ensuring the reliability of the track under various climatic conditions.

Advantages Of Gnee's

Elasticity and Fatigue Resistance: The elastic clips are made of high-strength steel, possessing excellent elastic recovery capabilities and able to withstand repeated deformation (e.g., within a 2.5mm range), exhibiting strong fatigue resistance.
Clamping Force: Typical clamping force is 10.0 kN (per terminal), ensuring rail stability and providing anti-theft performance ≥9 kN.
High Adaptability: Customizable to meet specific customer needs, such as double-gauge systems, turnout area applications, or anti-theft bolts. The system laterally locks the rails and effectively transfers lateral forces from the train to the sleepers.
Easy Maintenance: The non-separable design reduces the risk of component separation; its simple structure makes it suitable for ballasted tracks.
Safety: Widely used in Germany, the Netherlands, Switzerland, and other countries. For example, the German HM type fastener and the Dutch D.E type fastener both utilize SKL series spring clips with excellent results.