W14HH Type Rail Fastening System

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W14HH type rail fastening system is designed for heavy haul rail with a maximum acceptable axle load of 350 kN.
One complete set includes 4 pcs rail clips SKL14R ,4 pcs sleeper screws DHS35 with flat washer UIs7, 4 pcs guide plates Wfp-12 700R, 4 pcs plastic dowels SDU25, 2 pcs rail pads Zw141/175/7.

Technical Parameters

Part name	Item	Technical requirement		Remark
SKL14R clip	Type	Dia.14mm		Application for different rail types
	Material	60Si2Mn		Chemical composition(%): C: 0.57, Mn: 0.75, Si: 1.73, Cr: 0.07P:≤0.015, S: ≤0.006
	Finish	Plain oiled, painting, or upon request		500 hours salt spry test
	Hardness	42-47HRC
	Fatigue life	When clip spring deflection is 9.1mm, swing is 1.42mm, fatigue life is up to 3 million cycles without breaking.
	Standard refers to	DIN17221, GB/T1222
DHS35-161 screw spike	Type	M24x161mm
	Grade	Grade 5.6: 35#		Tensile strength: ≥500Mpa Yield strength: ≥300Mpa Elongation: ≥20% Cold bending: 90 degree without crack
	Finish	Plain oiled, oxide black, zinc plated, hot dip galvanized, Dacromet, Sherardizing		500 hours salt spry test
	Standard refers to	ISO898-1, UIC864-1, and NF F500-50
Flat washer ULS7	Type	Uls7
	Material	Q235
	Finish	Plain oiled, Oxide black, Zinc plated, Hot dip galvanized, Dacromet, Sherardizing		500 hours salt spry test
	Standard refers to	EN10025, EN10139
Plastic dowel SDU25	Type	For different sizes of screw spike
	Material	Reinforced Nylon 6 (PA6)	Density: 1.15g/㎝3 Tensile strength: 66.3Mpa Elongation: 31.3% Melting point: 228℃ Insulation resistance: ≥2.8×1012Ω Hardness: ≥114HRR
	Color	Black
Guide plate Wfp14k 700R	Type	UIC54,115RE rail, and size as ordered
	Material	Reinforced Nylon 6 (PA6+30%GF)	Density: 1.39g/㎝3 Tensile strength: 165Mpa Elongation: 3.5% Melting point: 226℃ Insulation resistance: ≥1.9×1012Ω Glass fiber content: 30-35% Hardness: ≥114HRR
	Color	Black
Rail pad Zw-141-175-7	Type	UIC54, 115RE rail, and size as ordered
	Material	TPE (Thermoplastic Elastomer )		Density: 1.09g/㎝3 Tensile strength: 4.23Mpa Tensile Modulus: 2.97Mpa Melting point: 200-220℃ Shore hardness: ≥40D
	Color	Black

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