Important

The F312 only measures a bi-directional single axis force. It does not measure variable vectors. A shear pin will not provide the same structural integrity as a solid inert axle or pin that it is intended to replace.

Technical

Shear pins must not be considered as precision loadcells due to the following:

  1. The pin dimensions dictated by existing hardware based applications may not allow an optimised design of the stress system. Often the combination of bending stress and bearing wear is highly detrimental to shear pin performance.
  2. Shear pin performance depends on the condition or dimensional tolerances of the mating hardware.
  3. Shear pin reaction surfaces are typically not ideally suited to precision loadcell design requirements.

Design Principles

Uniformly Distributed Load Type

High strength and structural integrity

Lower precision

Uniformly distributed load

Low Bending Stress

Low Deflection

Best Suited For Lifting Equipment Or Safety Critical Applications

The bearing fit tolerances in end support and pulley bearings provides higher structural stability and strength.

The bearing surfaces are often imperfect and produce reactions that vary in position with the applied load.

Point Load Type

Higher precision

Lower strength and structural integrity

Point load

High Bending Stress

 

Best Suited For Static Pins Or Process/R and D Force Measurements

The precisely positioned reaction points are designed to provide high repeatability and low hysteresis resulting in higher performance.

The higher bending stress and point load effects reduce the structural integrity.

Possible Design Features

  1. Toleranced diameters.
  2. Oil and grease ways.
  3. Keeper plates.
  4. IP67 sealing.
  5. High structural or high performance options.
  6. Heat shrink encasements and bearing surfaces.
  7. High temperature specifications.
  8. Integral amplifiers.
  9. Proof load test certification.
  10. Destructive tests.
  11. Cantilever or stub axle designs.
  12. High g / vibration resistant technology.
  13. Pins can be used in conjunction with the F314 bearing mount providing force vector data in the XY plane.

We can manufacture shear pin loadcells to your specific requirements. If you fill in the F312 data-sheet and send it we will respond with a quotation, usually within 24 hours. Alternatively you can print the F312 data-sheet and fill in the blanks on the table and fax or post it to our sales department.