logo
Introduction
Railroad fasteners are the components that hold the rails to the sleepers or ties. They play a crucial role in ensuring the safety and stability of the railway track. The types and characteristics of railroad fasteners vary depending on the type of railway, the weight of the trains, and the environmental conditions. In this article, we will discuss the different types of railroad fasteners and their characteristics.
Bolted Fasteners
1. Bolted fasteners are the most common type of railroad fasteners. They consist of a bolt, nut, and washer. The bolt passes through a hole in the rail and is secured with a nut and washer on the underside of the sleeper. Bolted fasteners are easy to install and replace, and they can be used on all types of railway tracks.
2. However, bolted fasteners have some drawbacks. They require regular maintenance to ensure that the bolts are tightened to the correct torque. They can also loosen over time due to vibrations from passing trains. Bolted fasteners are not suitable for high-speed railways or heavy freight trains.
Clip Fasteners
1. Clip fasteners are used on high-speed railways and heavy freight trains. They consist of a metal clip that attaches to the rail and a baseplate that sits on top of the sleeper. The clip fastener holds the rail in place and provides a cushioning effect to reduce vibrations.
2. Clip fasteners are more expensive than bolted fasteners, but they require less maintenance and are more durable. They can withstand the high forces generated by high-speed trains and heavy freight trains. Clip fasteners are also quieter than bolted fasteners, which is important in urban areas.
Pandrol Fasteners
1. Pandrol fasteners are a type of clip fastener that is widely used in Europe. They consist of a metal clip that attaches to the rail and a baseplate that sits on top of the sleeper. The clip is designed to grip the rail tightly and reduce vibrations.
2. Pandrol fasteners are more expensive than bolted fasteners, but they are more durable and require less maintenance. They are also quieter than bolted fasteners and can withstand the high forces generated by high-speed trains and heavy freight trains. Pandrol fasteners are commonly used on high-speed railways and urban railways.
Conclusion
Railroad fasteners are essential components of railway tracks. The type of fastener used depends on the type of railway, the weight of the trains, and the environmental conditions. Bolted fasteners are the most common type of fastener, but they are not suitable for high-speed railways or heavy freight trains. Clip fasteners and Pandrol fasteners are more expensive but are more durable and require less maintenance. They are commonly used on high-speed railways and heavy freight trains.