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Load Pins/Bolts, CPA/CBA Series

Home > Standard Products > Load Pins/Bolts, CPA/CBA Series

Load Pins/Bolts, CPA/CBA Series

The CPA/CBA Load Pins and Load Bolts are unique force sensors utilizing the internal strain gage transducer process developed by Strainsert and used also in our other Load Cells and Tension Link Load Cells. These load pins and load bolts offer precision force measurement by replacing existing shear pins, clevis bolts, load pins, shear axles and many other types of pinned joints for the aerospace, automotive, mining, marine and military industries.

For installation, download Load Pin Installation Instructions.

View Full Specs

Features

The Strain gages are sealed inside small axial holes within the load pin and are positioned at two locations at the Clevis to Clevis Eye interfaces. In order to sense only those strains which are induced by the shear forces at these two sections, the strain gages are positioned and oriented with great precision, at a neutral plane relative to one specific direction of pin loading.

The four strain gages (two at each location) are electrically connected to form a full bridge, the signal from each strain gage being additive so that the bridge output is proportional to the sum of the loads transmitted by the shear planes of the pin. The circuit typically includes temperature compensating, signal trim (optional) and balance resistors terminating in suitable connector socket or integral cable.

Standard models include detailed calibration data up to 500,000 lbs. Higher capacity calibration data is available at an additional charge. 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, and/or alignment influences affecting sensor measurement.

Features Include:

  • Precison Load Sensing
  • Rugged
  • Internally Sealed Strain Gages
  • Easy Installation
  • Direct Force Measurement
  • High Strength Stainless Steel
  • CBA Bolt Series Available

Applications

These standard clevis pins are typically used in new applications where the designer can develop the specific load pin joint around the standard clevis pin dimensions, to optimize force measurement performance. In addition, for existing load pin joints, the standard clevis pin may fit or can be incorporated through the use of bushings or modifying the clevis assembly. For information on custom designs, see custom load pins.

Strainsert – for superior internally gaged force transducers.

Strainsert stands for:

  • Product Quality
  • Knowledgeable Technical Staff
  • Standard and Custom Designs
  • Customer Service
  • Comprehensive Testing

Full Specs

Note: Load Pins from CPA-0.375-1 through CPA–2.5 are available through the Quick Ship Program.

View the below dimensional drawing as a reference for the following CPA & CBA Load Pin specification tables. 

Click here to review cable & cable assembly options.

Click here to review all other force sensor accessories.

Item # / CADDp - Nominal Pin DiameterLoad CapacityA - Width of Center Loading SectionB - Width of Clevis Support SectionC (Length)Optional Accessory - Keeper Plates
CPA-0.375-1*0.375 in1,500 lb3/8 in5/16 in3/16 INSPA-12.5-112-1-A
CPA-0.5-1*0.499 in3,000 lb1/2 in3/8 in1/4 INSPA-12.5-112-1-A
CPA-0.75-1*0.750 in6,000 lb11/16 in7/16 in5/16 INSPA-12.5-112-1-A
CPA-1*0.999 in12,500 lb11/16 in15/32 in5/16 INSPA-12.5-112-1-A
CPA-1.25*1.249 in18,000 lb1 in5/8 in3/8 INSPA-16-112-1-A
CPA-1.5*1.498 in30,000 lb1-1/8 in11/16 in1/2 INSPA-25-112-1-A
CPA-2*1.999 in50,000 lb1-7/16 in23/32 in9/16 INSPA-50-112-1-A
CPA-2.5*2.498 in75,000 lb1-7/8 in15/16 in5/8 INSPA-75-112-1-A
CPA-2.752.748 in100,000 lb2 in1-1/8 in11/16 INSPA-100-112-1-A
CPA-32.998 in125,000 lb2-5/16 in1-3/32 in11/16 INSPA-125-112-1-A
CPA-3.53.498 in160,000 lb2-5/8 in1-5/16 in7/8 INSPA-160-112-1-A
CPA-43.998 in200,000 lb3 in1-3/4 in1 INSPA-200-112-1-A
CPA-54.998 in300,000 lb3-7/8 in2-11/16 in1 1/8 INSPA-300-112-1-A
CPA-66.000 in400,000 lb4-5/8 in3-3/16 in1 3/8 INSPA-400-112-1-A
CPA-76.997 in600,000 lb5-3/8 in3-3/16 in1 5/8 INSPA-600-112-1-A
CPA-88.000 in800,000 lb6-1/4 in3-1/2 in1 3/4 INSPA-600-112-1-A
Item # / CADDp - Nominal Pin DiameterLoad CapacityA - Width of Center Loading SectionB - Width of Clevis Support SectionC (Length)Optional Accessory - Keeper PlatesOptional Accessory - Threaded Collars
CBA-0.375-10.375 in1,500 lb3/8 in5/16 in3/16 INSPA-12.5-112-1-A5/16-24SS
CBA-0.5-10.500 in3,000 lb1/2 in3/8 in1/4 INSPA-12.5-112-1-A3/8-24SS
CBA-0.75-10.749 in6,000 lb11/16 in7/16 in5/16 INSPA-12.5-112-1-A1/2-20SS
CBA-11.000 in12,500 lb11/16 in15/32 in5/16 INSPA-12.5-112-1-A3/4-16SS
CBA-1.251.249 in18,000 lb1 in5/8 in3/8 INSPA-16-112-1-A1-14SS
CBA-1.51.498 in30,000 lb1-1/8 in11/16 in1/2 INSPA-25-112-1-A1-1/4-12SS
CBA-22.000 in50,000 lb1-7/16 in23/32 in9/16 INSPA-50-112-1-A1-1/2-12SS
CBA-2.52.498 in75,000 lb1-7/8 in15/16 in5/8 INSPA-75-112-1-A1-3/4-16SS
CBA-2.752.748 in100,000 lb2 in1-1/8 in11/16 INSPA-100-112-1-A2-12SS
CBA-32.998 in125,000 lb2-5/16 in1-3/32 in11/16 INSPA-125-112-1-A*
CBA-3.53.500 in160,000 lb2-5/8 in1-5/16 in7/8 INSPA-160-112-1-A*
CBA-44.000 in200,000 lb3 in1-3/4 in1 INSPA-200-112-1-A*
CBA-55.000 in300,000 lb3-7/8 in2-11/16 in1 1/8 INSPA-300-112-1-A*

* Threaded Collar Note: Larger Sizes are Available Upon Request & Availability. Please call us at 1-610-825-3310.

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