PR 401 Rail Clip | Railway Fasteners Supplier

A PR401 Rail Clip is an elastic rail fastening clip made of forged spring steel that clamps the rail firmly onto the sleeper/baseplate. It is one of the PR series spring clips, designed to provide reliable clamping force, vibration resistance, and track stability in railway infrastructure.

Key Features of PR 401 Rail Clip

• Function: Holds the rail securely in the fastening system, preventing rail lift and ensuring alignment.

• Material: Typically forged from 60Si2Mn spring steel, offering high fatigue resistance and elasticity. 

• Elastic Performance: The spring nature of the clip absorbs vibration and shock from passing trains, helping to maintain track geometry. 

• Production: Manufactured by hot forging, which creates a uniform microstructure and reliable mechanical performance. 

• Durability: Designed with high hardness and fatigue life — often capable of millions of stress cycles without failure. 

• Typical Specifications

• Diameter: About 20 mm

• Weight: ~0.97 kg per clip

• Material: 60Si2Mn spring steel

• Hardness: 44–48 HRC

• Fatigue Life: Often 5 million cycles without breaking

• Surface Finish: Options include plain oiled, zinc plating, hot‑dip galvanizing, black oxide, etc. 

How PR 401 Rail Clip Works

The PR401 clip fits into specially designed recesses on the baseplate and exerts clamping pressure against the rail foot. This elastic clamping ensures the rail is held firmly in place, yet allows for slight movement caused by temperature changes and dynamic loading, without loosening. 

Applications of PR 401 Rail Clip

• Concrete sleeper tracks in ballasted railway systems

• Heavy freight lines, passenger lines, and mixed traffic routes

• Track systems requiring elastic clip fastening and low maintenance

Rail clips like the PR401 are a standard part of many rail fastening systems around the world, offering a balance of strength, resilience, and reliability for securing rails to sleepers in modern track installations.