Description
Technical Parameters
Railway Screw Spikes Specification
| Feature / Aspect | Description & Primary Function |
|---|---|
| Primary Function | To fasten the rail baseplate (or directly fasten the rail on older tracks) to wooden sleepers. They provide a stronger and more reliable hold than traditional cut spikes. |
| Key Advantage | Superior Holding Power: The threaded design bites into the wood and resists pulling out, providing excellent resistance to longitudinal forces like train acceleration, braking, and thermal expansion/contraction (rail creep). |
| Typical Material | Medium Carbon Steel. Often heat-treated to achieve high strength and hardness. Typically galvanized for corrosion resistance. |
| Design Anatomy | 1. Head: Designed to be driven by a specific wrench or power tool. 2. Shank: The body of the spike. 3. Threads: Coarse, deep, and often self-tapping threads that grip the wood fibers. 4. Point: Often chisel-pointed to aid in starting and self-tapping. |
Advantages & Disadvantages
| Advantages | Disadvantages |
|---|---|
| Excellent Resistance to Creep | Higher Initial Cost than cut spikes |
| High Holding Power | Requires Specialized Driving Tools (impact wrench) |
| Can be Re-tightened if loose | Installation is Slower without automated machinery |
| Less Damaging to Sleeper during installation (does not split wood) | Not suitable for concrete or steel sleepers |
| Longer Service Life on the same sleeper | |
| Better Performance on Grades and Curves |
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