Mechanical Dog Spike

Mechanical Dog Spike

Dog spikes is functionally equivalent to a cut spike and is also square in horizontal section and of similar dimensions, but has a pointed penetrating end, and the rail head has two lugs on either side, giving the impression of a dog's head and aiding spike removal.
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Description
Technical Parameters

Rail Dog Spike Fastening System

Railroad Railway Steel Rails Dog Spike

The Railway Dog Spike is a traditional cut-spike fastener used to secure flat-bottomed rails to timber sleepers. Forged from low or medium-carbon steel, its distinctive L-shaped head hooks over the rail base while the square tapered shank drives into pre-drilled holes. This friction-based fastener provides rigid, non-elastic hold through wood fiber compression. It remains essential for heritage railways, industrial sidings, and low-speed branch lines worldwide.

Technical Specifications:

Parameter Specification
Product Type Railway Dog Spike – Cut Spike Fastener
Material Grade Q235B / 45# / 55# Carbon Steel
Shank Section Square with rounded corners
Head Style Offset L-shape (dog head) with two lugs
Standard Length 5.5" (140 mm) / 6.0" (152 mm) / 6.5" (165 mm)
Shank Diameter 5/8" (16 mm) – 3/4" (19 mm)
Point Angle 25° ± 2° wedge-shaped tip
Elastic Rail Clamp

Installation & Maintenance Perspective:

  • Creates friction-based hold through wood fiber compression around the shank.
  • Provides rigid, non-elastic connection without spring recovery capability.
  • Resists rail uplift through hooked dog head engaging rail base.
  • Relies entirely on timber condition for consistent holding performance.
  • Allows periodic re-driving to maintain tightness after wood relaxation.

 

Maintenance & Operational Perspective

  • Manufactured from inexpensive medium-carbon steel with 0.15-0.30% carbon.
  • Receives minimal heat treatment, primarily relying on bulk material strength.
  • Protected by hot-dip galvanizing or black oxide coating against corrosion.
  • Produced to functional tolerances rather than precision engineering standards.
  • Offers lowest initial fastener cost among all rail securing options.
Railway Fastening Dog Spike System
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