Rail Fastenings Systems

Safe Driven (SD)

Pandrol’s SD product family is a durable and reliable threaded fastening solution that is suitable for all applications. SD stands for ‘Safe Driven’ and is characterized
by a more compact and robust design with lower carbon footprint versus other threaded solutions.

Products in the range

SD-RE

The system is characterized by a more compact and robust design with lower carbon footprint.

Its optimized geometry also enables automatic installation resulting improved efficiency and cost saving during installation and maintenance.

SD-RE

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SD-E

SD-E is the lightest version of the SD product family (up to 40% weight reduction).

SD-E

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SD-HH

The SD-HH fastening system is quick and efficient to instal with few tools and minimal training.

SD-HH

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Product Information Sheet

SD product overview

Pandrol’s SD product family is a durable and reliable threaded fastening range that has developed to fit in SKL shaped rails seats.

  • Its optimized geometry also enables automatic installation resulting improved efficiency and cost saving during installation and maintenance.
  • SD offers various advantages over generic screwed systems, which include avoiding ballast entrapment in the fastenings and an improved sealing of the dowel to protect the sleeper.
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Benefits of the SD

01

Pre-assembled

The SD system’s pre-assembled captive fastening units and simple switch-on/switch-off function enable very high rates of track construction and maintenance. This efficiency translates into huge savings in labour, as well as reduced distribution and handling
costs throughout the system’s lifecycle.

02

Switch on/off

The switch-on/switch-off technology and use of mechanised equipment reduces the risk of injuries to track workers during installation.

03

Versatile

The versatility of the SD design makes it suitable for most track infrastructure and enables it to meet a wide range of customer requirements for stiffness, adjustment, and rail clamping force. It can also be designed for use in small spaces such as turnouts, allowing customers to keep the same type of fastening throughout the track.

04

Environmentally friendly

The SD is an extremely environmentally-friendly fastening solution. reducing the CO2 footprint, logistics costs and environmental impact.

05

Robust

The SD system has been designed to avoid frequencies that cause fatigue and failure, resulting in a significant increase in the robustness of the tension clamp and a longer life cycle.

06

Adaptable

The SD range has been adapted to fit into different types of sleepers normally equipped with other fastening systems as SKL, Nabla or J2, among others.

Technical features of SD

01

Captive fastening

SD sleepers can be supplied to sites fully pre-assembled, with all components remaining captive during construction and maintenance activities.

02

Switch-on/switch-off function

The SD clip can be moved quickly from the parked position (in which it is held securely without intruding into the rail seat) into the service position. The clip is simply pushed from one position to the other to either clamp or release the rail.

03

Eco-design

Compared to other screwed solutions, the clip is relatively low weight. This reduces its environmental impact and logistics cost without compromising on performance.

04

SKL conversion

SD products can be installed in an SKL-shaped rail seat, providing a simple retrofit upgrade.

05

Increased robustness & Lifecycle

The clip has been modified to avoid frequencies where destructive amplitudes are generated, causing the clip to fail in fatigue. A significant increase in the natural frequency is key to increase the robustness of the tension clamp.

06

Innovative geometry

Pandrol SD innovative geometry increase the contact area between clip and rail and solves ballast entrapment problem of SKL tension clamps.

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