SKL Clips To Fasten Steel Rails

Railway Clip is used to fasten the rails to the underlying base plate together with the concrete sleeper. A variety of different types of heavy-duty clips are used to fasten the rails to the underlying baseplate or Sleeper, one common being the E Clip, which is shaped like a stubby paperclip. Another one is the SKL Tension Clamp, which is also the most widely used type all over the world. Others like KPO Clamp and Nabla Clip, also used in different situations.

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Description

Technical Parameters

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Rail SKL CLIP Fastening System

The Railway SKL Clip is a precision-engineered elastic rail fastener characterized by its omega-shaped (Ω) double-bend configuration, designed to deliver sustained clamping force through controlled multi-stage deflection. Manufactured from high-performance spring steel alloys, it provides comprehensive rail restraint-vertical, lateral, and longitudinal-while accommodating thermal movement and dynamic loading without maintenance or adjustment throughout its service life.

Technical Specifications:

Standard Compliance	Region	Key Requirements	SKL Compliance
EN 13481-2	Europe	Fastening systems for concrete sleepers	✅ Fully compliant
EN 13481-4	Europe	Fastening systems for steel sleepers	✅ Fully compliant
AREMA Chapter 30	North America	Rail fastening systems	✅ Meets requirements
UIC 864-5	International	Technical specifications for fastenings	✅ Certified
TB/T 3065	China	Railway elastic fastening systems	✅ Type-approved
ISO 9001	Global	Quality management systems	✅ Certified

Installation & Maintenance Perspective:

Produced through precision hot-forming or cold-forming processes followed by controlled heat treatment.
Dimensional tolerances maintained within ±1.5mm for critical geometry features ensuring consistent performance.
100% visual inspection supplemented by statistical sampling for load testing and metallurgical verification.
Surface defects strictly controlled-no cracks, seams, or folds permitted on finished components.

Maintenance & Operational Perspective

Transfers train loads through multiple contact points for optimal stability and reduced rail seat stress.
Spreads dynamic forces across wider sleeper bearing area, preventing localized fatigue and compression damage.
Reduces peak pressure on rail foot corners through optimized contact geometry and graduated load transfer.
Balances vertical clamping force (9–18 kN depending on SKL type) with lateral restraint (40–60% better than symmetric clips).