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Type HD Rail Clamp

High strength clamp for low speed rail applications. Provides lateral adjustability for fast and precise rail alignment.

View technical specification


The Type HD is used to secure sections of rail or crane lines in low speed applications, up to 60 metres per minute, such as ground track, elevated rail and overhead gantries. The rail clip features a rotatable central component that provides a high degree of lateral adjustability. It allows contractors to quickly and precisely align rails before securing them in position using standard hand tools. The clamps are manufactured from high strength SG iron, creating a reliable connection that minimises maintenance requirements.

The clips are used in a variety of environments including train maintenance depots, industrial facilities, water treatment plants, dam/dockside cranes, automated warehouses and power stations. Four product variants are available, each in sizes M20 or M24 to meet the diverse requirements of each industry and application (see product options below for more details).

Product Options

Type HD Soft
This clip does not touch the top of the rail, which allows the rail to lift slightly to accommodate rail wave, reducing stress and fatigue in the rail and clips.

Type HD Hard
Designed to hold the rail down tightly to prevent rail uplift. Like other Type HD rail clips, it is made from high strength SG iron.

Type HD Spring
An elastomer spring provides vertical restraint while still allowing the rail to lift with rail wave. It also reduces track running noise.

Type HD Isolated
For rail applications requiring electrical isolation, this product features a nylon insulator (also known as British Rail Orange).

For product comparison chart download datasheet.

Features & Benefits

  • High strength clamp.
  • Suitable for all rails with tapered flanges and crane speeds up to 60m/min. 
  • High degree of lateral adjustability.
  • No rail damage as drilling or welding the rails is not required.
  • Safely and easily secures rail using only hand tools.
  • Four options available for various requirements.
  • Overcomes issues with misalignment of studs.
  • Contact Lindapter for wheel loads above 400kN or lateral loads higher than wheel loads.
  • Please contact Lindapter to ensure suitability of component for application.


Click on an approval logo to download the certificate or report.


  • Manufactured from SG iron to BS EN 1563.
  • Available with zinc plated, hot dip galvanised or sheraplex finish if required.

Technical Specification

Click to view labelled diagram

Normal Lateral Conditions High Lateral Conditions Dimensions Distances1) Width
Clip Type Product Code Bolt 8.8 SWL (FOS 4:1) Tightening Torque* SWL (FOS 4:1) Tightening Torque* Leg Length3) Stud Length3) Lateral Adjustment Plate Width Y X W
Z V H L min. A
kN Nm kN Nm mm mm mm mm mm mm mm
Soft HD20S M20 22.5 185 46.0 450 F - 4 F + 40 +/- 11.5 B + 137 30 27 74
Soft HD24S M24 40.0 320 60.0 760 F - 4 F + 43 +/- 8 B + 130 30 27 74
Hard HD20H2) M20 22.5 185 46.0 450 F - 8 F + 38 +/- 11.5 B + 137 30 27 74
Hard HD24H2) M24 40.0 320 60.0 760 F - 8 F + 41 +/- 8 B + 130 30 27 74
Spring HD20SP M20 22.5 185 46.0 450 F - 7 F + 40 +/- 11.5 B + 137 30 27 74
Spring HD24SP M24 40.0 320 60.0 760 F - 7 F + 43 +/- 8 B + 130 30 27 74
Isolated HD20SPOR M20 22.5 185 46.0 450 F - 6 F + 42 +/- 11.5 B + 147 35 27 74
Isolated HD24SPOR M24 40.0 320 60.0 760 F - 6 F + 45 +/- 8 B + 140 35 27 74

1) Based on plug set at 3 o’clock position.
2) Not suitable for use with a resilient pad.
3) Please specify the required leg length (V) when ordering. If you are using the resilient pad with Soft, Spring or Isolated types (resilient pads are not suitable with Hard), increase the leg length and stud length (H) by the thickness of the pad.
* Torque figures based on bolts / setscrews in an unlubricated condition.

Faster to Install

No drilling or welding!

Independently Approved

Reasons to choose Lindapter

  • Save time and money

    Save time and money

    Clamping two steel sections together avoids time-consuming welding or conventional drilling and bolting.

  • Safer connections

    Safer connections

    On-site drilling and welding is avoided, removing the need for hot work permits and encouraging safer site conditions.

  • High strength

    High strength

    Lindapter clamps are manufactured from high strength materials to resist high load requirements and harsh environments.

  • Industry leading approvals

    Industry leading approvals

    Lindapter has earned a reputation synonymous with safety and reliability, gaining multiple independent approvals.

  • Adjustable


    Quickly align steel sections by sliding the section into the correct position before tightening the Girder Clamp to complete the installation.

  • Free connection design

    Free connection design

    Lindapter’s experienced Engineers can design a bespoke connection based on your specific requirements free of charge.

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