Measuring a Torque Tool’s Accuracy

One key aspect to getting a day’s work done is having tools that are calibrated and measured for accurate work and readings, and for a torque wrench or load cells, calibration just takes a little know how, and the tool can easily and quickly be put back into accurate shape for further use. Torque wrench measurements are vital to keeping these tools working well, and a torque equation will ensure that the tool does its work right.

A torque wrench is one that uses torque, or twisting force, to do its work, and many industrial worker and mechanics make use of these tools, often to fasten nuts and bolts, or other machine parts with just the right amount of force. The tool’s torque equation ensures that the proper amount of force is used: enough to get the job done, but not too much, where excessive force could damage the tool or the item it is being used on. So, a torque equation works best when the tool is calibrated, and torque wrench measurements and torque analyzers are there to help.

Sensor units for torque wrenches and loading cells alike can work in a wide variety of temperatures, from -452 degrees Fahrenheit to 450 degrees. Some settings, such as a furnace or a freezer, may present these very low temperatures, and a wrench’s torque equation may be adjusted accordingly. To get a torque wrench calibrated, a wrench with a known magnitude, a standard device, is used against which to compare the other tool. A torque wrench will have a reading on it showing torque applied during work, but this reading will become inaccurate over time. Both tools are used on a sample nut or bolt with the same level of force, and the standard tool is used to determine necessary adjustments to the other tool. Any tool’s torque equation will benefit from this re-calibration.

Other machines that use sensors to display force are load cells, which come in some varieties including strain gauge, hydraulic, spool, and more. Strain gauge technology is the most common for loading cells, and has proven its worth for over 40 years, and the technology grows more efficient and price friendly over time. In such a system, supports under a plate give off a constant electric signal which is disrupted when a force applies itself to the plate and the supports grow warped. The signals they give off in response to the pressure show up as the reading. And as with torque wrenches, such devices sometimes grow inaccurate over time and will need calibration with methods similar to those of torque wrenches.