Custom Load Pin Transducers

Custom Load Pin Transducers

Load pins are sometimes referred to as force sensing clevis pins, lifting pins, weight pins, force pins, or shear pins but they are all the same in that they are all strain gauge transducers that measure weight. Our load pins are custom designed to our customer’s requirements. Load pin will typically replace the sheave pin of a lifting device. Pin loading must be in one direction only or side loading will occur and reduce pin load accuracy. To this end, keeper plates are often employed to keep the force pin aligned properly.

Highlights

  • Shear load pins are very versatile and used in many tension load applications
  • Load pins can replace clevis pins
  • Load pins minimize or eliminate crane head space
  • Outputs include mV/V, 4-20mA, 0-10V, wireless
  • Load pin accuracy is <1% typical; 0.1% to 0.2% may be achieved with multi-point calibration
  • Load pins are susceptible to side loads so pin loading must be in one direction only
  • Load pins are custom engineered and manufactured to fit the load and support arrangement

Product Details

Custom Load Pin Transducers

Meticulously crafted to meet individual customer requirements, these load pins serve as replacements for sheave pins in lifting devices, especially in the mining industry.

Primarily utilized in hoisting and tension load applications, they deliver reliable and precise measurements.

Ensuring unidirectional pin loading is crucial to avoid potential inaccuracies caused by side loading.

Frequent utilization of keeper plates maintains proper alignment, guaranteeing consistent and accurate results.

PRODUCT SPECIFICATIONS

Capacities

Available in any capacity (custom)

Typical Accuracy

<1%FS; 0.1% to 0.2%FS may be achieved with multi-point calibration

Safe Overload

150% safe overload (standard but customizable)

Ultimate Overload

300% (standard
up to 1000% (mining and safety)

Full Scale Output

1 mV/V nominal typical

Maximum Excitation

5 volts DC (standard, customizable to 10V)

Operating Temp

-40°C to +80°C (standard)

Compensated Temp

-10°C to +40°C (standard)

Sealing Standard

IP-67 (standard) protected against high pressure jets of water and short periods of emersion
IP-68 (available) protected against high pressure jets of water and long periods of emersion at depths of up to 5m

Material

17-4 PH Stainless Steel (standard)
4140 / 4340 High strength alloy steel may be possible

Protective Coating

Electro-finish Stainless Steel
4140 / 4340 : Industrial electroless nickel – high phosphorous corrosion and chip resistant

Bridge Resistance

350 Ohm (standard but customizable)

WIRELESS LOAD SHACKLES

Our wireless load shackles are based on the industry standard Crosby shackle and come in capacities ranging from 8.5t to 55t. Equipped with clip lock pin for fast assembly and dissassembly. Our 2.4Ghz wireless transmitters can provide a open field range up to 2000 ft at 3m height and can be display on a single channel or multi-channel hand held receivers.

SHEAR LOAD PIN WITH AMPHENOL MILITARY CONNECT

External indicators can also be connected to the force pin via 4-pin military style quick-disconnects. This allows for easy disconnection and reconnection from the weight pin should the shear pin ever need to be moved, repaired, or stored. Quick disconnect cable comes in 10 ft, 20 ft, and 50 ft lengths.

CABLED LOAD PIN

Tension measurement can be displayed by an indicator via wired connection (see wired digital indicator). The cable connection between the shear pin and display can be a seal-over hard connect. This is suitable for installations where the load pin is not expected to be disconnected from the indicator. Please specify how much home run cable is required.

M2000 LOAD CELL INDICATOR

The recommended indicator for tension applications is the M2000 which provides for multi-point calibration to improve accuracy. If the crane is located outside, the M2000 should be purchased in a NEMA enclosure (see left photo) to protect against dust and water. Various enclosures are available (see below images) and more details about the M2000 are available in the indicators website.

SETPOINT OPTION CARD

The M2000 is available with a setpoint option card. These are overload detection and protection devices. Setpoints utilize solid state relays that can be used to trigger alarms or switch devices (i.e. motors) on or off at specified weights. When ordering the Setpoint option the type of device (AC or DC) being switched must be specified. Setpoints are frequently used in digital hanging crane scale applications.

PARTS OF LINE SOFTWARE

The M2000 can be loaded with a special program that allows a hanging crane scale operator to adjust the indicator for multiple “Parts of Line”. The program is configurable for one to twelve parts of line and the software will be provided free of charge when needed with the purchase of an M2000 indicator and a crane scale dynamometer.

REMOTE SCORE BOARD

Remote score boards are often referred to as “remote displays”. This type of display must be used in conjunction with a digital indicator equipped with a serial output. The remote display mirrors what is displayed on the weight indicator. They are used in applications where weighing information needs to be seen at a distance from the indicator. Score boards are available in 2″ (50 ft visibility), 4.5″ (250 ft visibility) and 6.5″ (300+ ft visibility) lettering.

4-20 mA SIGNAL CONVERTER

We can supply 4-20 mA ouput versus standard mV/V signal. The design incorporates a load cell shield connection and polarity insensitive current loop connections. It is not susceptible to damage from shorting loop leads together or to ground during operation and is specifically designed for ESD hazardous environments. These converters are ideal for systems that require a PLC.

Frequently Asked Questions About Custom Load Pins

What customization options are available for your load pins?

Our custom load pins can be tailored for specific load ranges, materials (e.g., steel alloy, aluminum alloy), finishes, and geometries.
We offer flexibility to accommodate high and low measurement loads, unique environmental conditions, and specialized requirements​.

Do you offer any tools to help design custom load pins?

Not specifically a tool, but a team. Once you decide to do a custom load pin with Massload, our engineering team will be at your disposal to help you find the best design solutions.

What applications are your custom load pins suitable for?

Our custom load pins are versatile and can be used in a wide range of applications, including aerospace, marine, military, automotive, mining, and structural testing. Specific applications include projects on mining, cement and oil & gas industries.

What kind of technical support do you offer?

We provide comprehensive technical support, including engineering assistance, calibration services, and repair/recalibration options.
Our team is available to help you throughout the entire process, from design to maintenance​​.

Are your load pins tested and certified for quality and durability?

Yes, our load pins undergo rigorous testing and certification processes to meet industry standards.
We ensure they perform reliably even in demanding conditions, offering long operational life and extreme durability​​.

What is the difference between a load cell and a load pin?

A load cell is a transducer that converts a mechanical force into an electrical signal, used in various applications to measure weight or force.
Load cells are typically used in platforms, weighbridges, and other static load measurement systems.
On the other hand, a load pin is a type of load cell specifically designed to replace the standard pin in a load-bearing joint (e.g., sheave pin, clevis pin) and measure the load applied directly at the pin. Load pins are ideal for dynamic load measurement applications such as cranes, winches, and other lifting equipment​.

How do load sensing pins work?

Load-sensing pins work by using strain gauges embedded within the pin to measure the deformation (strain) caused by the applied load.
The strain gauges convert the mechanical strain into an electrical signal proportional to the load. This signal is then transmitted to a display or data acquisition system, providing real-time measurement of the load.
Load sensing pins are designed to fit directly into the existing structure, allowing for accurate and efficient load monitoring without significant modifications to the equipment​.

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