, the rail clip is a critical component connecting the rail to the sleeper. Its performance directly affects the safety and stability of the track structure. Among commonly used clips, SKL-type and E-type clips each have distinct structural and functional characteristics.
features a symmetrical W-shaped design. Its double-arm structure provides greater elasticity and higher clamping force, typically ranging from 9 to 12 kN. It maintains strong clamping retention over time, effectively preventing loosening and micro-movements caused by repeated train loads. This makes it ideal for high-speed and heavy-haul railways where track conditions are more demanding. The SKL system is often used with guide plates and gauge blocks, offering enhanced gauge adjustability and easier maintenance.
E-type clip has a simpler C-shaped geometry. Its clamping force is lower, usually between 6 and 9 kN. While sufficient for conventional passenger and freight lines, its clamping force tends to degrade faster under high-frequency loading or intense vibration. Due to its compact design, gauge adjustment and maintenance are generally less flexible than in the SKL system.
In terms of fatigue life, SKL clips are made from high-elasticity spring steel and feature optimized geometry, allowing them to withstand millions of load cycles with greater reliability. E-type clips, although cost-effective and based on mature manufacturing processes, offer lower long-term durability under high-speed or heavy-load conditions.
In summary, SKL clips are better suited for technically demanding lines, especially in high-speed and heavy-load applications. E-type clips, with their economic advantage, are widely used in standard-speed and general railway projects. Neither system is inherently superior-the key lies in matching the clip type to the specific requirements of the rail line.
, as a specialized rail fastener manufacturer, provides a complete line of products, including rail fastening, anchor, rail joint, rail clip, rail screw, anchor bolt, rail clamp plate, rail fishplate, and fishplate bolt for connecting rail tracks.
We also make rail fastenings for crane rail and elevator guide rail, along with other related products. We manufacture according to GB/TB (Chinese national standards and railway standards), AREA, UIC, BS, DIN, ASTM, and AS standards.
Our high strength bolts come in different specifications of Class 4.8, 4.6, 5.6, 5.8, 6.8, 8.8, 10.9, and 12.9. A variety of non-standard fastening is also available. We can customize our products using customer drawings or samples as well.
We supply E type rail fastening, W14 rail fastening systems, rail clips to metro, tramway fastenings, crane rail clips, track bolts and joint bar for rail connection, screw spikes, tie plates and concrete rings connection bolts for tunnels. They are mainly according to standards of AREMA, IFI, ASTM, UIC and other specifications from clients.