Description
Technical Parameters
Railway Dog Spikes
| Category | Parameter | Description / Specification | Notes / Purpose |
|---|---|---|---|
| General Information | Product Name | Dog Spike (or Track Spike) | Also known as Cut Spike or Line Spike. |
| Primary Function | To fasten flat-bottomed rail to wooden sleepers (ties). | Provides a strong, simple mechanical hold. | |
| Application | Traditional railway tracks with wooden sleepers. | Not used on concrete sleepers or modern fastening systems. | |
| Physical Dimensions | Total Length (L) | 127 mm (5"), 140 mm (5.5"), 152 mm (6") | 6-inch (152mm) is the most common size. |
| Shank Diameter (D) | ~12.7 mm (1/2") to ~15.9 mm (5/8") | Thick, square or rectangular shank provides strength. | |
| Head Dimensions | ~32 mm x 32 mm (1.25" x 1.25") | Large, flat head to bear against the base of the rail. | |
| Point | Sharp, chisel-type or pyramidal point. | For easier driving into wood. | |
| Material & Finish | Material Grade | Low to Medium Carbon Steel (e.g., AISI 1045, 1050) | Provides good strength and ductility for driving. |
| Surface Treatment | Hot-Dip Galvanizing (HDG) or Black (Ungalvanized). | HDG is standard for corrosion resistance. "Black" spikes are for temporary use or low-corrosion environments. |
Key Terminology & Notes:
- "Dog" Spike: The name comes from the spike's supposed resemblance to a dog's head or its tenacious "biting" hold into the wooden tie.
- Function: Its main job is to resist lateral movement of the rail, preventing the gauge from widening. It does not provide significant vertical hold-down force like modern elastic fasteners.
- Limitations:Can work loose over time due to wood shrinkage and dynamic train loads, requiring frequent re-driving ("re-driving spikes" is a classic track maintenance task).Not suitable for high-speed or heavy-axle-load lines due to their inferior holding power compared to modern fastening systems.
- Modern Context: While largely replaced by elastic fasteners (e.g., Pandrol clips, Spring clips) on mainlines, they are still extensively used:On secondary and low-traffic lines.In industrial sidings and yards.On heritage and tourist railways.
- Sizes: The 6-inch (152mm) spike is the industry standard for most North American and European railways using wooden ties.
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