Item: Rail Lag Bolt
Material: high strength steels, such as Carbon Steel or Alloy Steel
Weight: 0.16-0.52kg
Process: Forging

Products Description

Timber Screws / Rail Lag Bolts are special screws used to secure railroad rails to wooden or concrete sleepers. They are usually made of high-strength steel with special shapes and sizes to meet the requirements of the rails and sleepers.

The shape of Timber Screws / Rail Lag Bolts is usually a long and slender screw with a flat head and a sharp bottom. This design allows the screws to penetrate the holes in the rails and provide a stable connection on the sleepers.

To install Timber Screws / Rail Lag Bolts, holes are first pre-drilled into the sleepers, and then the screws are inserted into the holes. Using a screw hammer or other suitable tools, the screws are hammered into the sleepers, ensuring that they are firmly anchored to the rails. Due to their longer length compared to regular screws, Timber Screws / Rail Lag Bolts provide additional support and stability.

Timber Screws / Rail Lag Bolts play a crucial role in railway construction and maintenance, helping to fix the rails and maintain their correct position. This type of screws must undergo strict quality control and testing to ensure that they can withstand the weight of the trains and the vibration force during operation.

In summary, Timber Screws / Rail Lag Bolts are special screws used to secure railroad rails to the sleepers. They provide stable connection and support, allowing railway systems to operate safely and securely.

Application

Timber Screws / Rail Lag Bolts are metal fasteners used to fix and connect railroad rails. They play a vital role in stabilizing the rails firmly onto wooden or concrete sleepers.

Manufacturing Process

Forging
Materials
High strength steels, such as Carbon Steel or Alloy Steel
Surface Treatment
Anti-corrosion treatment such as Galvanization or Blackening

Features

Fixing rails:

Railroad screws secure the rails tightly to the sleepers by driving them into the wooden or concrete sleepers, preventing any movement or shaking. This ensures the stability and safety of the railway lines.

Load transfer:

Timber Screws / Rail Lag Bolts are designed to withstand the heavy pressure and vibration generated by trains in motion. They firmly connect the rails to the sleepers, effectively transferring the load of the trains to the foundation and underlying support structures.

Maintaining rail geometry:

Timber Screws / Rail Lag Bolts play a crucial role in maintaining the desired rail geometry. They keep the rails in the correct position and spacing, ensuring the rails’ levelness, vertical alignment, and curvature meet the design requirements.

Preventing rail slippage:

By firmly fixing the rails, Timber Screws / Rail Lag Bolts prevent any slippage during train operations. This is essential for ensuring stable passage of trains through the railway rails.

Improving operational safety:

Good rail fixation enhances the safety of railway lines. Timber Screws / Rail Lag Bolts play a vital role in preventing rail movement, reducing vibration, and maintaining rail geometry, thereby improving the smoothness and safety of train operation.

In a word, Timber Screws / Rail Lag Bolts are essential components to ensure the safety and stability of railway rails. They perform the important function of connecting, fixing, and supporting the rails.

Shapes

Round Head:

This is the most common shape for Timber Screws / Rail Lag Bolts, with a round head. Round head screws are suitable for connecting wooden or concrete sleepers to rails, providing stable fastening force and resistance to slippage.

Square Head:

Square head Timber Screws / Rail Lag Bolts have a square-shaped head. This shape is often used in special situations such as at certain train intersections or areas with higher lateral forces, to increase the stability of the connection.

Hex Head:

Hex head Timber Screws / Rail Lag Bolts have a hexagonal-shaped head. The hex head design provides greater torque transmission capability, making it easier to tighten and unfasten.

Additionally, the shank portion is typically cylindrical, but there may also be some variations. For example, the shank may have a taper, gradually becoming thinner from the tip towards the head. The tapered design helps insert the railroad screws into the sleepers and provides additional holding force.

It is important to note that specific railroad screw shapes and standards may be influenced by regions, railway systems, and customer requirements. Therefore, when selecting railroad screw s, the appropriate shape should be determined based on specific application needs and relevant standards.