Rail Tension Clamp Supplier
Sep 10,2025
Xinda Railway: Your trusted global Rail Tension Clamp Supplier, delivering superior quality and reliability for secure railway infrastructure worldwide

Rail Tension Clamps charactors
Rail Tension Clamp, is also called rail clip, rail spring clamp, rail spring clip, it is made from spring steel, used for fastening the rails on kinds of railway lines.
Henan Xinda Railway Equipment Co.,Ltd is the main manufacturer and exporter of SKL rail tension clamps, which are responsible for the electrical insulation of the rails and their support. The rail tension clamps are widely used in laying reinforced concrete sleepers with a diameter of 13mm to 15mm, ranging from SKL1, SKL2, SKL3, SKL12, SKL14, SKL21,SKL24,SKL28,SKL30 etc.
Part name | Type | Material | Finish | Remark |
SKL21 tension clamp | Dia. 13mm | 60Si2CrA, 38Si7 | Plain oiled, color painting, or the other required ones. | Hardness: 42-47HRC |
- Application: Light Rail System/Conventional Ballasted Line/ High-speed Lines
- Customization: Available
- Maximum axle load: 26t
- Clamping force: 10.0 kN (per terminal)
- Resistance to repeated deformations : in the range of 2.5mm
- Theft resistance ≥ 9 kN
- MOQ: 5000~10,000pcs
- Delivery time: 25~30 days
- Production ability per month: 100,000~150,000 pcs
W21 Rail Fastening System Specification
The W 21 system for conventional rail offers the same elasticity than the already approved W14. However, the tension clamp Skl21 with its fatigue strength of 2.5 mm and a deflection of 14.5 mm performs clearly more than the Skl14. For this purpose, the Skl 21 rail clip has been reinforced by a thicker wire diameter.
Due to the improved characteristics of the Skl21 rail clip, a highly elastic rail pad can be added in the W21 HS (High Speed) system: Perfect requirements for the load transfer in high speed tracks.
The W21 system becomes increasingly popular and since 2008 it has been being used in 30 countries on a total of about 3.000 km (1.900 miles), for instance in Bulgaria, Czech Republic, Finland, Germany, Kyrgyzstan, Lithuania, Slovakia, Argentina, Algeria and Azerbaijan.
The components of the W21 fastening system:
- Skl21 Tension clamp -4 units;
- Screw spike Ss 35/Uls 7 -4 units;
- Angled Guide Plate Wfp-14K12 -4 units;
- Plastic dowel -4 units;
- Rail Pad 148/185/6- 2 units;
W21 Rail fastening system is suitable for pre-assembly at factory, the manufacturer will warrant that the fastener system and fasteners are comply with last version of EN 13481 standard. W21 Raiilway Fastener System will be C class mentioned it EN 13481-1 standard and will warrant to use safely up to 300 km/h speed.
The system can be configured according to needs concerning different rail types.
We welcome your inquiry or order for the SKL21 fastening systems. And any components of this fastening system can be made in short time, such as SKL21 rail tension clamp.
Production of SKL21 rail tension clamp
We can provide products according to customers drawings and samples.Our main products are as following:
1. Railroad spike/Screw spike/Coach screw/Drive screw/Sleeper Screw, Track spike/Cut spike/Dog spike/Lock spike/,etc.
2. Rail clip/ Tension clamp/ E clip/ PR clip/ SKL clip/ elastic clip/ DE clip/Russia ACP clip
3. Track bolt/ T bolt / Rail bolt/ Clamp bolt/ Inserted bolt/ Clip bolt/ Fish bolt/ Square bolt/ Rod bolt /Rail joint bolt
4. Swivel Bolts/ U bolts/ J bolts/ Anchor bolts/ Foundation bolts/ Stud bolts/ Rod bolts/ Curved segment bolts/ Tunnel bolts
5. Rail chair/ Tie plate/ Base plate / Rail plate/ Rail fixing base
6. Fish plate / Rail Joint bar / Rail joints/ Rail Splice Bar
7. Clamp plate/ Rail clamp/ Crane rail clip/ Steel clip/ Nabla clip/ RN clip
8. Rail Shoulder/ Rail sleeper steel Inserts/ Rail Anchors /Rail anti-creeper
9. Rail insulator/ Rail plastic dowel /Rail plastic sleeve/ Angle Guide plate/ Nylon insert/ Aluminum Vortok Sprial
10. Rail Pads/Rail Sole plate/ Rail anti-virbition mat/ Rubber pad
Our core competencies are aligned with the current and future needs of our customers.
One of the primary advantages of using a rail tension clamp is its exceptional ability to absorb and redistribute longitudinal stresses. In CWR tracks, rails are susceptible to expansion and contraction caused by temperature changes. Without an effective clamping mechanism, this can lead to buckling in hot weather or fracture in cold conditions. The rail tension clamp is specifically designed to counteract these forces, thereby preventing track misalignment and ensuring smooth train operations.
Durability is another key benefit. High-quality rail tension clamp products are manufactured from robust materials capable of withstanding extreme environmental conditions, heavy loads, and constant vibration. This reduces the frequency of maintenance and replacement, resulting in lower lifecycle costs and minimized service disruptions. The reliability of the rail tension clamp contributes directly to the operational efficiency of railway networks.
Furthermore, the installation process of a rail tension clamp is designed for efficiency and ease. This allows for quicker deployment during new construction or repair activities, reducing labor time and costs. The clamp’s design ensures a secure and consistent grip on the rail, providing long-term performance without loosening.
Rail tension clamp is a critical innovation in rail fastening technology. It enhances safety by maintaining rail stability, offers economic benefits through reduced maintenance, and supports the seamless operation of modern railways. Its role is vital in building resilient and efficient transportation systems for the future.
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