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Railway bolts and nuts, also known as track bolts and nuts, are specialized fasteners that secure the railway track system, primarily by connecting rails at joints with fishplates and fastening rails to the railway sleepers (ties). They are made from high-strength materials like carbon or alloy steel to withstand the immense pressure of passing trains and are designed with specific heads and often include features like lock washers to prevent loosening from vibrations.
Key Functions and Characteristics
Joining Rails:Fish bolts are threaded through holes in fish plates, which are metal plates used to connect the ends of two steel rails, forming a joint.
Securing Rails to Sleepers:Fang bolts and hook bolts are used to fasten the rail assembly to the railway sleepers (concrete or wooden tie plates), providing the essential vertical and lateral support for the track.
High Strength and Durability:Railway bolts and nuts are constructed from high-strength, durable materials like carbon steel or alloy steel to handle extreme loads and stresses from passing trains.
Vibration Resistance: To prevent loosening under constant vibration, these fasteners are often used with lock washers and other anti-loosening mechanisms, ensuring track stability and preventing derailments.
Alignment and Stability: The fasteners provide lateral support, helping to maintain the correct distance (gauge) between the rails and ensuring a safe and steady ride for trains, especially at high speeds or on curves.
Types of Railway Bolts
Fish Bolt: Used at rail joints to connect two rail sections.
Fang Bolt/Anchor Bolt: A fanged nut bites into the sleeper, providing strong anchoring for the rail.
Hook Bolt: Often used to secure a tie plate to wooden sleepers.
Clip Bolt/T-Bolt: Part of clip-based fastening systems to hold the rail.
Square Head Bolt: A common type of bolt with a square head, often used for fish plates.
Railway nuts are threaded components used in rail fastening systems to secure rails to ties and other parts, working with bolts and washers to prevent displacement and ensure safety. They are essential for connecting rails, holding rail joints together, and attaching clips and clamps to the rail. Nuts provide the crucial tightening force within the system, relying on components like spring washers to prevent loosening and maintain track stability under the stress of passing trains.
How Railway Nuts Function?
How Railway Nuts Function?
Threading: The nut has a threaded internal hole that screws onto a bolt or stud.
Tensioning: As the nut is tightened, it compresses components like washers against the rail or sleeper, creating a strong clamping force.
Preventing Loosening: The combination of a rail nut, a spring washer, and a flat washer provides tension and cushioning to prevent loosening caused by vibrations and temperature changes.
Key Applications
Rail Joints: Connecting rail ends with fish plates and fish bolts, the nuts provide the necessary clamping force to hold the two rail ends together.
Rail Clips and Clamps:Nuts are used to attach various types of rail clips and clamps that hold the rail to the sleeper or tie plate.
Anchor Bolts and T-Bolts:Used to fix rail tie plates and rail sleepers (ties) to the ground or tracked.
Components They Work With
Bolts: Nuts always work in conjunction with bolts, such as track bolts, fish bolts, or other specialized fasteners.
Washers: Flat washers distribute pressure, while spring washers provide tension and prevent loosening.
Rail Pads: Elastomeric pads that provide cushioning and reduce vibration between the rail and the sleeper.
Kunshan Signum Machinery Technology Co.,Ltd is able to supply railway bolts and nuts according to clients’ requirements or drawings with competitive price.
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