Load Pins & Load Measuring Axles

High-precision load pins & load shackles from Octogon:

Load pins (also called load shackles) are the most elegant and efficient solution for measuring forces directly in the force flow, without altering the basic mechanical structure of a system. They replace conventional axles, joint pins, or bolted connections, transforming passive machine elements into intelligent, high-precision sensors.

Whether in lifting technology, special machine construction, offshore applications, or the agricultural industry – Octogon offers custom-made load pins that are precisely tailored to the geometry and environmental conditions of the respective application.

Seamless Integration without Design Changes

The greatest advantage of our load pins lies in their design. The customer provides the dimensions of the existing pin (length, diameter, position of the retaining device), and we manufacture the load pin as an exact geometric replica. The function of the existing bearing or roller is fully preserved, while simultaneously obtaining accurate measurement results.

Signals, Interfaces, and Measurement Electronics

Depending on the system architecture and degree of automation, we offer the full spectrum of signal outputs. From passive sensors for external control cabinets to fully integrated digital solutions.

If space is severely limited in the joint, we use remote electronics. If the load pin offers enough space, we integrate the signal amplification directly into the housing of the load pin, which minimizes interference and simplifies wiring.

Functional Safety: Redundant Systems for Critical Applications

In industries such as crane and lifting technology or heavy machinery manufacturing, the demands on machine safety are enormous. Standards such as EN 61508, EN 62061, and ISO 13849 require fail-safe systems.

For these safety-critical applications, Octogon designs redundant load pins. These can meet certification requirements up to SIL 1 to 3 (Safety Integrity Level) and PL c to e (Performance Level).

• True Redundancy: Execution with two completely independent strain gauge bridges and measuring amplifiers
  

• Separate Signal Paths: Separate internal wiring and separate connection points minimize failures due to common cause failures

• Diagnostic Capability: The system architecture allows for continuous plausibility checks of the signals by the superordinate safety control

Mechanical Configurations and Special Equipment

No two operating sites are alike. Therefore, we precisely adapt the mechanical properties of the load pins to the environmental conditions:

• ATEX / IECEx / CSA Certification: For use in hazardous areas (e.g., oil and gas industry, chemical plants, or silos), corresponding certifications according to ATEX and IECEx directives are available to ensure maximum safety
  
  
• High-temperature applications up to 250°C: Specially designed versions enable reliable and precise operation even under extreme thermal conditions, such as those found in the steel industry or foundry and furnace technology
  
  

• Robust materials: Standardly made of high-strength stainless steel to withstand corrosion and harsh environments

  
  
• Protection classes up to IP68 / IP69K: For standard industrial applications, IP65 or IP67 is often sufficient. For use underwater (offshore) or with high-pressure cleaning (food technology/construction machinery), we offer hermetically sealed housings
  
  
• Electrical connection: Optionally as a fixed cable (axial or radial, depending on the installation situation) or via robust, industrial-grade connectors (e.g., M12)
  
  
• Lubrication bores: For movable joints, the pins can be equipped with internal lubrication channels and grease nipples to grease the bearing points directly through the pin
  
  
• Anti-rotation devices: Individually milled retaining plates, grooves, or flats ensure that the pin remains precisely positioned in the force flow at all times

Cross-Industry Application Possibilities

Due to the free scalability of nominal loads – from a few kilonewtons to several hundred tons – Octogon's load pins can be used across industries:

• Crane and Lifting Technology: Overload protection on pulleys and winches.

• Construction Machinery: Load moment limitation on excavators and wheel loaders.

• Offshore and Marine: Winch controls and mooring monitoring.

• Agricultural Technology: Traction measurement on tractors and implements.

• Stage Technology: Cable force monitoring in theater and event riggings.

Do you have a specific metrological challenge? Regardless of whether you want to replace a simple standard load pin or need a complex, redundant system with a digital interface for special machine construction – contact the Octogon engineering team. We develop the optimal solution for your application.