Product Introduction
The SKL12 spring clip rail fastening system is a high-performance fastener device specially used for railway tracks. It realizes the stable connection between rails and sleepers or track plates through the elastic clamping principle. Its core components include SKL12 spring clips, insulating gauge blocks, embedded iron seats and nylon sleeves.
The system adopts a unique spring clip geometry design and high-strength steel forming process to form elastic constraints in the longitudinal, transverse and vertical dimensions. It can not only effectively maintain the gauge accuracy, but also absorb the vibration energy generated by the dynamic load of the train. It also has excellent fatigue resistance and corrosion resistance. Through the comprehensive application of modular structural design and insulating materials, the system achieves high-reliability fastening of the track structure while ensuring electrical insulation performance. It is suitable for passenger and freight mixed running lines, subways and light rails with speeds below 200 kilometers per hour. Its maintenance-free characteristics and up to 30 years of design life significantly reduce the maintenance cost of the entire life cycle. It is a typical fastener solution that balances mechanical performance and economy in modern rail engineering.
Product Specifications
| Item Name | SKL12 Rail Clip | |||
| Type | E clip (e1809, e2006,e2007,e2009,etc) | |||
| Skl clip (skl1,skl3,skl12,skl14) | ||||
| Or the type by customers' drawings | ||||
| Material | 60Si2MnA | 60Si2CrA | 55Si2Mn | 38Si7 |
| Chemical composition(%) | C:0.56-0.64, Mn:0.60-0.90, Si:1.60-2.00, Cr:≤0.35, P:≤0.03, S:≤0.03 | C:0.56-0.64, Mn:0.40-0.70, Si:1.40-1.80,Cr:0.70-1.00 P:≤0.03, S:≤0.03 | C:0.52-0.60, Mn:0.60-0.90, Si:1.50-2.00,Cr:≤0.35 P:≤0.03, S:≤0.03 | C:0.35-0.42, Mn:0.50-0.80, Si:1.50-1.80, P:≤0.03, S:≤0.03 |
| Hardness | For e clip: 44-48HRC | |||
| For skl clip: 42-47HRC | ||||
| Fatigue life | for Dia.18 is 3 millions cycles without breaking | |||
| for Dia.20 is 5 millions cycles without breaking | ||||
| Surface | plain (oiled), Oxide black, color painting, HDG, Zinc Plating... | |||
| Standard refers | DIN17221, BS970, GB/T1222 | |||
Production technical process
Raw material preparation: Select spring steel that meets the standards, such as 60Si2CrA, 60Si2MnA, etc., and inspect the chemical composition, mechanical properties and surface quality of the materials to ensure the quality of the raw materials.
Forging: Heat the steel to a suitable temperature, use the die forging process, and gradually form the basic shape of the spring bar through multiple stamping and forming to obtain good internal structure and mechanical properties.
Machining: Machining the forged spring bar, including end processing, screw hole processing, etc., to ensure the dimensional accuracy and surface quality of the spring bar to meet the design requirements.
Heat treatment: Quench and temper the machined spring bar to improve the strength, hardness, toughness and elasticity of the spring bar so that it meets the specified mechanical performance indicators.
Surface treatment: Surface treatment of the spring bar is performed as needed, such as painting, galvanizing, etc., to improve the corrosion resistance and wear resistance of the spring bar and extend its service life.
Quality inspection: Use a variety of inspection methods, such as appearance inspection, dimension measurement, hardness inspection, mechanical property test, non-destructive testing, etc. to conduct comprehensive quality inspection on the spring bars to ensure that the products meet relevant standards and customer requirements.
Packaging and warehousing: Pack the spring bars that have passed the inspection, usually in cartons, pallets, etc., and then store them in the warehouse and wait for shipment.
As a professional international trading company of railway fasteners, GNEE RAIL provides procurement services for various rail connection products for global customers. The company's main products include spring clips, sleeper bolts, insulating gaskets and other railway-specific fasteners. All products strictly comply with international quality standards. We have long-term cooperation with many well-known domestic manufacturers and can provide product options of different specifications according to customer needs. The professional international trade team ensures that every link from inquiry to delivery is smooth and efficient.
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