Nabla Rail Fastening System

A lightweight plastic base plate and NABLA Evolution components make up the Nabla Rail Fastening System, an affordable tram and light rail fastening system. Depending on the needs of the project, the Nabla Rail Fastening System's high performance and ease of use can be used with both top-down and bottom-up construction techniques. An air evacuation system made up of air holes and channels allows the base plate to be inserted into fresh concrete or dry mix with efficiency.

The Nabla Rail Fastening System's structural elements include Nabla clips, insulators, studs, special spring washers, hexagonal nuts, and flat washers. The French TGV high-speed rail system makes extensive use of the Nabla Rail Fastening System. By carefully tightening the nut, the Nabla Clip produces the clamping force.

 

 

 

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 cycles without 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.

 

 

 

Features Of Nabla Rail Fastener System

The GS anchors of the NABLA Tram Fastening System provide excellent load transfer to concrete slabs with tensile strengths of 90kN and above.

The fastening system is suitable for a wide range of rail applications. Adjust the Nabla fastening system to offer a wide range of stiffnesses (from 35 MN/m to 150 MN/m) and better than -10dB vibration attenuation.

Add insulation and rely on the built-in protection of the Nabla fastening system. The system comes with covers that protect against concrete contamination, and the covers are compatible with grass, pavement, concrete and asphalt surfaces. They enhance insulation and protect the fastening system from concrete contamination.

The plastic base plate is partially embedded in the concrete to withstand lateral and longitudinal loads. It is designed to evacuate trapped air and water, thus ensuring a solid fill of concrete under the rail seat.

The Nabla fastening system provides electrical insulation above 20 K ohms (EN13146-5:2012) to protect against stray currents.

 

Advantages Of Nabla Rail Fastening System

Easy to install:

The Nabla tram fastening system can be installed quickly and easily, as it is compatible with both bottom-up and top-down construction methods. The system can be applied to dry mix or fresh concrete, so tram lines can be up and running as quickly as possible.

Reliability:

The system's design includes an optimized baseplate that allows trapped air and water to escape, preventing weak points in the concrete fill and ensuring the strength and performance of the track system throughout its service life.

Direct Fastening:

The Nabla Fastening System is a direct fastening system. The track is attached to the baseplate using the same method that attaches the baseplate to the supporting base structure.

 

 

 

We understand that product quality is the foundation of long-term cooperation. As our products are used in the railway industry, where safety and reliability are critical, quality control is never compromised. At Lanling, from raw material inspection, forging, heat treatment to performance testing, every product undergoes strict control to ensure that it fully complies with railway industry standards before delivery.

 

 

 

 

Lanling provides secure and efficient packaging and transportation for all orders, using standard export packaging with steel straps and reinforced pallets, along with anti-rust protection for sea shipments. Customized packaging is also available on request, and flexible logistics solutions ensure safe delivery for bulk orders and international shipments worldwide.

 

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