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The Vossloh SKL 40 rail clip—also known globally in the heavy infrastructure sector as the SKL 40 tension clamp or elastic W-clip—is an ultra-heavy-duty fastening component designed for full geometric and functional compatibility with top-tier configurations of the Vossloh SKL rail fastening system.
Engineered alongside the SKL 30 for track sections facing the most brutal structural demands, the SKL 40 model is the ultimate choice for extreme heavy-haul freight networks, industrial crane lines, high-impact switches and turnouts, and specialized transit tracks that manage colossal axle loads exceeding 35 to 40 metric tons.
Vossloh SKL 40 System Compatibility & Assembly Breakdown
To effectively eliminate longitudinal rail creep, mitigate high-frequency acoustic vibrations, and prevent rail tilting along exceptionally sharp curves, the SKL 40 works within a multi-tiered tracking matrix. It integrates seamlessly with the following system components:
1. High-Axle-Load Sleepers & Slab Systems
The SKL40 rail clip is optimized for heavy-duty concrete sleepers built with wide, custom-molded shoulder cavities, as well as specialized direct-fixation, ballastless concrete slab track networks.
2. Reinforced Guide Plates & Insulators
The system uses high-density, glass-fiber-reinforced composite angled guide plates. These components match the broad lateral geometry of the SKL 40 W-clip, structurally locking the rail foot in place and safely grounding immense lateral forces straight into the concrete infrastructure.
3. High-Tensile T-Bolts, Screw Spikes & Fasteners
To sustain continuous downward pre-tension force without fracturing under intense cyclical strain, the SKL 40 tension clamp utilizes high-strength steel anchoring components:
· Ribbed Plate Assemblies: Fastened indirectly via heavy-duty HS32 or HS26 T-head bolts paired with specialized spring washers and heavy hex nuts.
· Direct Fixation: Secured straight into concrete sleepers using rugged Ss35 screw spikes driven into high-density polyethylene (HDPE plastic dowels) embedded within the sleeper track.
4. Shock-Absorbing Elastomer Rail Pads
The SKL 40 works alongside specialized, highly resilient elastomer rail pads (such as Vossloh cellentic or high-performance EVA/TPU pads). These pads cushion the track structure against intense ballast crushing, damp dynamic forces, and provide reliable electrical insulation (>5kΩ).
5. Compatible Steel Rail Profiles
The clip footprint is fully compatible with major global heavy rail profiles, including standard UIC60, 60E1, 136RE, and heavy 50kg/60kg crane rail variations.
Technical Specifications of SKL40 Tension Clamps
Every elite SKL 40 rail clip must be manufactured to stringent international railroad standards (such as DIN17221, EN13481, or GB/T1222) to resist plastic deformation under massive cyclic flexing:
Sourcing High-Quality SKL40 Rail Clips in China
Heavy freight operations and mining routes cannot afford down-time due to material fatigue or clip breakage. Selecting a supplier with rigorous quality control testing is critical to operational safety.
As a leading railway track components factory, Kunshan Signum Machinery Technology Co., Ltd (Signum Rail Fasteners China) manufactures premium SKL40 clips and integrated assembly kits that offer 100% geometric and operational compatibility with original Vossloh rail fastening systems. We provide custom OEM production based on customer blueprints and support diverse anti-corrosion protective coatings, including plain oiled, black oxide, zinc plating, and specialized multi-layer zinc flake Dacromet coating designed to endure severe environmental exposure.
Contact Signum Rail Fasteners China today to receive a rapid factory-direct price quotation, request technical drawings, or acquire verified metallurgical test certifications for your next heavy-haul track installation!
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