Description
Technical Parameters
SKL Clip Types & Comparative Specifications
| Feature / Type | Standard SKL Clip | High-Performance SKL Clip | Anti-Corrosion SKL Clip |
|---|---|---|---|
| Target Application | Mainlines, Freight Lines, Standard Tracks | High-Speed Rail, Heavy-Haul Lines, High-Stress Zones | Coastal Areas, Tunnels, Industrial Zones with high humidity/corrosion |
| Material Grade | 60Si2MnA Spring Steel | 60CrMoA / 55CrSi Alloy Steel | 60Si2MnA with Enhanced Coating |
| Surface Treatment | Phosphating | Phosphating + Supplementary Coating | Thick Epoxy Coating (≥ 80μm) or Hot-Dip Galvanizing |
| Minimum Toe Load | 20.5 kN | 22.0 kN | 20.5 kN |
| Fatigue Life (Test Standard) | 3 million cycles | 5 million cycles | 3 million cycles |
| Electrical Resistance | < 5 Ω | < 5 Ω | < 1 Ω (Special design for better conductivity) |
| Key Advantage | Cost-effective, reliable for standard duties | Superior fatigue resistance & clamping force for extreme conditions | Maximum corrosion protection, extended service life in harsh environments |
| Color Coding | Typically Black (Phosphating) | Blue or Yellow Marking | Typically Green (Epoxy) or Silver (Galvanized) |
SKL Clip Quality Assurance & Inspection Parameters
| Inspection Category | Parameter | Standard / Requirement | Test Method |
|---|---|---|---|
| Dimensional Check | Wire Diameter | Tolerance: ±0.2 mm | Vernier Caliper / Micrometer |
| Free Height | As per designated drawing | Height Gauge | |
| Toe Angle & Geometry | Conformity to master sample | Optical Comparator / Profile Projector | |
| Mechanical Properties | Hardness (HRC) | 42 - 48 HRC | Rockwell Hardness Tester |
| Toe Load (Clamping Force) | 20.5 - 22.5 kN | Specialized clip tester (e.g., ZPMC) | |
| Permanent Set Test | No permanent deformation after loading to 30 kN | Load testing machine, measure height loss | |
| Performance & Durability | Fatigue Test | No fracture after 3-5 million cycles at ±8 kN dynamic load | Electro-hydraulic servo fatigue tester |
| Salt Spray Test (Corrosion) | No red rust after 500 hours (Neutral Salt Spray) | Salt Spray Chamber (ASTM B117) | |
| Coating Quality | Coating Thickness (if coated) | Epoxy: 80 - 120 μm | Coating Thickness Gauge |
| Adhesion | No peeling (Cross-cut test Level 0) | Cross-Cut Adhesion Test |
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