Screw Spike Overview
Screw spikes are essential components in railway construction, varying in lengths from 5.5 to 11.5 inches, with a diameter of around 5/8 inch. They feature a tapered shank with a threaded end, allowing easy insertion into wooden ties. The head, typically square or hexagonal and approximately 1.5 inches wide, crowns the spike.
The manufacturing process involves forging, cutting, threading, and heat treatment. Heated steel is forged into a tapered shape, cut to the desired length, and threaded using a specialized machine. Heat treatment enhances the spike's strength and hardness.
Used to secure rails to wooden ties, screw spikes offer a sturdy and adjustable fastening solution, especially useful in curved track sections requiring periodic adjustments. Key advantages include adjustability, durability, and resistance to loosening. While simpler to install and remove than common spikes, they come at a higher cost, require specialized tools, and may be more prone to corrosion due to their threaded design.
