SKL1 Rail Clip (SKL1 Tension Clamp) for Railway Fastening System

The SKL1 rail clip is a W-shaped, permanent elastic tension clamp used in railway fastening systems, primarily with concrete sleepers, to secure rails and prevent movement. 

Key Characteristics and Specifications

Characteristics:

• Function: The clip provides resilient clamping, absorbing impact energy from passing trains and maintaining consistent pressure to prevent vertical or horizontal rail movement (rail creep).

• Design: It is a key component of the overall SKL fastening system, which also includes screw spikes, plastic dowels, guide plates, and rail pads. The design ensures electrical insulation between the rail and the reinforced concrete sleeper.

• Material: Typically manufactured from hot-forged spring steel, such as 60Si2Cr, 55SiMn, or 38Si7. The hot-forging process provides a uniform microstructure and high strength.

Specifications:

• Diameter: Ø13mm.

• Weight: Approximately 0.48 kg per piece.

• Hardness: HRC 42-47.

• Toe Load: 8.0-12KN (kilonewtons).

• Fatigue Life: Designed to withstand 3 to 5 million cycles without breaking.

• Surface Finishes: Common finishes include plain oiled, oxygen black, zinc-plated, hot-dip galvanized, or Dacro coating.

• Standards: Conforms to standards such as GB/T 1222 and DIN 17221. 

Applications

The SKL1 rail clip is a reliable solution for various railway applications: 

• Concrete Sleepers: It is specifically engineered to work with the rigid nature of concrete sleepers, providing the necessary elasticity that concrete alone cannot offer.

• Turnouts: Excels in high-stress areas like turnouts (points and crossings) due to its superior resistance to complex, multi-directional forces.

• Track Types: Used in ballasted and some ballastless tracks for mixed, freight, and high-speed traffic. 

Kunshan Signum Machinery Technology Co.,Ltd is a manufacturer and supplier produce the SKL1 rail clip and associated fastening systems. We are able to offer SKL clips with associated fastening parts according to your drawings,requirements and standards with competitive price.