↵Rail Dog spike Fastening System
The Railway Dog Spike is a forged steel fastening device characterized by its offset "dog-head" profile and square-shank geometry, representing the most historically fundamental method of securing rail to timber sleeper . Unlike elastic fasteners that accommodate movement through spring action, the dog spike functions as a rigid interference fastener-its tapered chisel point displaces wood fibers upon driving, creating a compression fit that relies entirely on timber's viscoelastic grip for holding power
Technical Specifications:
|
|---|
Installation & Maintenance Perspective:
Interference Fit Mechanism: Relies on wood fiber displacement and elastic recovery around the tapered shank, creating frictional resistance without threads or spring elements .
Offset Head Engineering: The asymmetrical head profile provides a precisely angled bearing surface that matches the rail foot taper, distributing vertical loads across the spike head .
Torsional Preload Generation: The square shank's rotation during driving induces residual torque in the spike shank, creating lateral clamping force against the rail base .
Maintenance & Operational Perspective
- Controlled Carbon Content: Modern specifications require 0.17-0.25% carbon with 0.90-1.35% manganese, balancing strength (70,000 psi min tensile) with ductility to prevent brittle fracture during driving .
- Dual-Phase Microstructure: Engineered to achieve a ferritic-pearlitic structure that combines impact resistance for installation hammering with gradual work-hardening under service loads .
- Sacrificial Corrosion Design: Intended to corrode preferentially to timber sleepers, with replaceable spike preserving the higher-value timber asset .
Gnee Professional supplier
Hot Tags: dog spike system, China dog spike system manufacturers, suppliers, factory, economical rail spikes, rail spikes workshop, track spikes production, installation friendly rail spikes, rail spikes installation, track spikes installation
