Strainsert Co.

Many Strainsert Instrumented Load Pin designs are incorporated into sheave and pulley systems. The user has the option of either designing a sheave around our standard CPA Clevis Pin series or having a custom pin manufactured for an existing sheave design with a tailored measurement capacity and geometry, allowing for simple installation and optimized measurement capacity. The Instrumented Sheave Pins are often used to measure line tension by monitoring reaction load on the pin. Using the equations provided below, the line tension can be determined. Strainsert factory calibrations are intended to simulate installed conditions, however, it is recommended that an in-place calibration be performed to account for any installation, tolerance, andor alignment influences affecting sensor measurement.

Features Precision Load Sensing Easy Installation Rugged Bolt Series, CBA Direct Force Measurement Internally Sealed Strain Gages High Strength Stainless Steel Custom Pin design performance and specification may vary with design requirements. Note: All Load Pins can be fit with a permanently attached cable Model CPA-1 (SS)X shown

Features of Strainsert Load Sensing Clevis Pins Easy Installation: By replacing pins in Crosby (or Equivalent) wire rope socket, with minimum machining alterations (2-tapped holes), and hardware (2-bolts, keeper plate). Precise Cable Load Sensing: Complete bridge circuit bonded and sealed inside small hole along longitudinal axis of Pin, calibrated in the direction of the applied load. Rugged: Self protecting nature of strain gage installation sealed in small hole, and has proven to be immune to harsh environment. Accuracy: Strainsert Load Sensing Clevis Pins have combined error due to repeatability and non-linearity less than 1% of rated load typically. Typical Load Sensing Applications End of Whip Line Winch Clam Shell Boom Pendant Cable Support Crane Hoist Cables Mooring Lines

Features of Strainsert Load Sensing Clevis Pins Easy Installation: RCP and SCP models replace standard Crosby or Skookum shackle boltspins respectively Precise Load Sensing: Complete strain gage bridge circuit bonded and sealed inside small hole along longitudinal axis of Bolt, by exclusive Strainsert process. Rugged: Due to self protecting nature of strain gage installation sealed inside small holes. Proven immune to harsh environment. Accuracy: Strainsert Load Sensing Clevis Bolts have combined error due to repeatability and non-linearity of less than 1% of rated load typically.

Features of Strainsert Load Sensing Clevis Pins Easy Installation:By replacing pins in hydraulic cylinders with minimum alterations using custom keeper plates. Precise Load Sensing:Complete strain gage bridge circuit bonded and sealed inside small hole along longitudinal axis of Pin, by exclusive Strainsert process. Rugged:Due to self protecting nature of strain gage installation sealed in small hole. Proven immune to harsh environment. Accuracy:Strainsert Load Sensing Clevis Pins have combined error due to repeatability and non-linearity of less than 1% of rated load typically. Custom Pin design performance and specification may vary with design requirements.

When both the magnitude and the direction of the load are unknown, the vector measurement is possible using a Strainsert force sensing pin instrumented with two strain-gage bridges oriented 90° apart around the circumference. The cross-section of the pin shows the two sets of strain gages, the Y bridge will sense force component Py, while the X bridge will sense forces in the Px direction, 90° to Py. The outputs from the two bridges, Ex and Ey, can be measured and the resultant force magnitude and direction can be determined (see Biaxial Schematic Image.) *Certain custom pin geometry and bridge to bridge effects (cross-talk) may result in a measurement accuracy of 5% or greater. For such cases, Strainsert can provide a correction algorithm to minimize errors.

The Strainsert deep seahigh pressure Clevis Pin provides the ability to measure force at clevis joints under high-pressure conditions. Complete systems are available, and include the Instrumented Clevis Pin, cabling, and a digital display indicator.

Dual bridge gaging provides two independent strain gage circuits. This option is advantageous for controlling multiple feedback systems as well as providing redundant force-measuring capability.

Integral signal conditioning, built into the pin, provides a high level 4 – 20 ma output, while maintaining pin ruggedness and durability. Consult Factory regarding 4-Wire Amplifier

Strainsert offers a custom Load Pin configurator to allow engineersdesigners to input nominal design parameters to determine application feasibility and generate conceptual load pin designsdrawings quickly and effectively. All finalized designsdrawings will be completed and formalized by Strainsert.