Description
Technical Parameters
Railway Dog Spikes
| Aspect | Detailed Description |
|---|---|
| Definition & Nickname | Traditional rail fasteners used to secure T - rail (Vignole rail) to timber sleepers (ties). Nicknamed "dog spikes" due to their head shape resembling a dog's ear. |
| Structure & Shape | - Head: Typically "dog - ear" or "square - headed" (for easy wrench grip); some variants have a countersunk design. - Shank: Smooth or slightly tapered, with a pointed tip for driving into timber sleepers. - Length: Ranges from 120mm to 220mm (common: 150mm, 180mm) to match sleeper thickness. |
| Material | - Mainly carbon steel (e.g., Q235, 45# steel) for basic strength. - High - strength variants use alloy steel (e.g., 35CrMo) for heavy - haul lines, with surface treatments (hot - dip galvanizing, black oxide) to resist rust. |
| Key Function | 1. Fix the rail base to timber sleepers, preventing lateral (sideways) and vertical (upward/downward) rail movement. 2. Maintain track gauge (distance between two rails) by limiting rail shifting. 3. Transfer partial train loads from rails to sleepers. |
Dog Spike Models & Specifications
Dog spikes are categorized primarily by their size and weight, which determine their holding power for different rail sizes.
| Model / Size | Length (mm) | Shank Size (mm) | Weight (approx. per 100 pcs) | Application |
|---|---|---|---|---|
| Standard (e.g., AREMA 4-3/4") | 121 | 16 x 16 (Square) | 13.5 kg | Most common size for standard wooden sleepers. |
| Large | 140 - 150 | 19 x 19 (Square) | 22.5 kg | For heavier rails or softer wood sleepers. |
| Small | 100 - 115 | 14 x 14 (Square) | 12.0 kg | For light-duty tracks or temporary lines. |
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