High-Precision Load Pins from Octogon: Customized Sensors for the Highest Demands

Load pins (also called force measuring pins) are the most elegant and efficient solution for measuring forces directly in the load path without altering the basic mechanical design of a system. They replace conventional axles, clevis pins, or pin connections, transforming passive machine elements into intelligent, highly accurate sensors.

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

Seamless Integration Without Design Changes

The biggest 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 measuring pin as an exact geometric replica. The function of the existing bearing or roller remains fully intact, while simultaneously obtaining accurate load data.

Signals, Interfaces, and Measuring 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 pin offers sufficient 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 construction, 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 3 (Safety Integrity Level) and PL e (Performance Level).

• True Redundancy: Design with two completely independent strain gauge bridge circuits.

• 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 system.

Mechanical Configurations and Special Equipment

No two deployment locations are the same. Therefore, we precisely adapt the mechanical properties of the load pins to the environmental conditions:

• 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 (axially or radially routed, depending on the installation situation) or via robust, industrial-grade connectors (e.g., M12).

• Lubrication Holes: For movable joints, the pins can be equipped with internal lubrication channels and grease nipples to lubricate the bearing points directly through the pin.

• Anti-Rotation Devices: Individually milled retaining plates, grooves, or flats ensure that the pin always remains precisely positioned in the force vector.

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 various industries:

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

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

• Offshore and Marine: Winch controls and mooring monitoring.

• Agricultural Technology: Traction force measurement on tractors and implements.

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

Do you have a specific metrological challenge? Whether you want to replace a simple standard pin or require a complex, redundant system with a digital interface for special machine construction – contact Octogon's engineering team. We will develop the optimal solution for your application.