Nabla Rail Clamp fastening System

The Nabla Fastening System is an safe and reliable system, most widely used in Europe. It can be used in Tram, LRT, Metro, Main Line and High Speed tracks.

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A rail fastening system is the whole set fasteners that are used to join the rails and railroad ties (or other type of rail foundation). Normally, rail fastening system is consist of rail spike, rail bolt, rail clip, tie plate, rail pad and plastic dowel, etc. Rail fastening system is also known as an intermediate coupling part. On the whole, railway fastening system plays a role in fixing rails to the sleepers, maintaining the gauge and preventing longitudinal and lateral movement of the rail relative to the sleeper.

The Nabla Rail Fastening System is a cost-effective tram and light rail fastening system. Easy to use and high performance, the Nabla Rail Fastening System is compatible with both top-down and bottom-up construction methods depending on project requirements. The base plate is designed for efficient insertion into dry mix or fresh concrete, thanks to an air evacuation system consisting of air holes and channels.

Nabla Railway Fastener System Components

Structurally, a Nabla clip rail fastening system contains these parts like nabla clips, insulator, double end screw spike, special spring washer, hex nut and plain washer.

Part name	Type	Material	Surface	Remark
Nabla clip	Thickness 4mm or 4.5mm	60Si2MnA, 60Si2CrA	Plain oiled, red color painting, or the other required by customers	Hardness: 42-47HRCFatigue life: 3 millions cycleswithout breaking Standard: DIN17221,GB/T1222
Insulator	UIC54, UIC60, S49 rails	Reinforced Nylon 66 (PA66)	Black, blue, yellow, green or other colors	Different designs are available.
Double end screw spike	UIC54, UIC60, 50kg rail, 60kg rail	Grade 5.6: 35#	Plain oiled, black oxide, galvanized, hot dip galvanized	Bending at 30 degree without crack.
Special spring washer	18.25×34×78mm	ML08Al	Plain oiled, black oxide, galvanized, hot dip galvanized	For protecting the thread of the double end screw spike
Hex nut	As ordered	Grade 5: 35#	Plain oiled, black oxide, galvanized, hot dip galvanized	Standard: DIN985
Plain washer	As ordered	Q235	Plain oiled, black oxide, galvanized, hot dip galvanized	Standard: DIN125

Screw Spike

A screw spike, rail screw (or lag bolt) is a large (~6 in or 152 mm length, slightly under 1 in or 25 mm) metal screw used to fix a tie plate or fasten rail. Screw spikes are fixed into a hole bored in the sleeper.

Tie Plate

A tie plate, baseplate or sole plate is a steel plate used on rail tracks between flanged T rail and the crossties. The tie plate increases bearing area and holds the rail to correct gauge. They are fastened to wooden ties by means of spikes or bolts through holes in the plate.

Rail Pad

A Rail Pad is a resilient insulating material located between the rail foot and the sleeper, or baseplate surface.

Rail Clip

A Spring Clip is a metal fastener made of spring steel which clamps the rail foot to the sleeper or baseplate.

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GNEE RAIL provides high-quality Nabla rail fastening systems, which can be used with various rail types such as UIC 54, UIC 60, 50kg rail, 60kg rail, etc., and have a wide range of applications. Our Nabla rail fastening system is safe and reliable, the spring can provide dynamic and stable fastening pressure, has good electrical insulation, prevents concrete defects and has strong pull-out resistance.

Gnee’s rail fastening system is currently exported to many countries around the world. We provide customized services for customers, and the size and appearance of the product can be made according to customer requirements.

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Nabla Railway Fastener System Components

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