How To Check Torque Wrench Calibration

If you regularly use a torque wrench, it’s important to make sure it’s calibrated correctly. A torque wrench that isn’t calibrated can cause inefficiencies and even damage the bolts, screws or equipment you’re working on. Which can end up costing you more time and money in the long run. In this blog post, we’ll explain how to check your torque wrench’s calibration and how to adjust it if necessary.

The Importance of Torque Wrench Calibration

Torque wrenches are used in a variety of settings, from automotive repair to production lines. In each case, it is crucial that the torque wrench is properly calibrated. A torque wrench that is not properly calibrated can cause components to be either over-tightened or under-tightened. This can lead to problems such as stripped threads, damaged components, and decreased product quality. 

Torque wrench calibration is therefore essential for ensuring that products are assembled correctly and meet quality standards. By ensuring that torque wrenches are properly calibrated, manufacturers and assembly workers can help to avoid these problems and maintain high levels of quality control.

Equipment You Need To Check Torque Wrench Calibration

To check the calibration of a torque wrench, you need two things: a torque applicator, and a torque analyser. The torque applicator is used to apply a known amount of torque to the torque analyser. The analyser measures the amount of torque applied and displays it on a digital readout. By comparing the reading on the analyser to the known value, you can determine whether or not the torque wrench is accurate. 

Torque wrench analysers, also known as torque wrench sensors, are available in many different models, depending on the precision required. For example, some models can measure down to 0.1 Nm of torque, while others measure up to 3,000 Nm. For low range applications, a standard 2-100 Nm sensor will suffice. But for larger applications, a higher-range sensor may be necessary. 

Torque wrench calibration analysers and sensors are available from many different manufacturers. Some popular brands include Snap-on, Hexagon, and Starrett. You can find these products at most industrial supply stores or online retailers that sell tools and equipment for industry. Whichever brand you choose, make sure that you select a model that is appropriate for your particular application.

How To Check The Calibration Of A Torque Wrench

Luckily, checking the calibration of a torque wrench is a relatively simple process. 

  1. First, you will need to find a torque wrench calibration chart, which can typically be found online or in the tool’s manual. 
  2. Next, locate the torque wrench calibration point for your specific model of the wrench. 
  3. Use a calibrated torque meter analyser to check the force output of your wrench at this point. Start by applying torque to the input of the analyser. That movement is transmitted to an indicator, which rests on the maximum torque reading until it is set to zero.
  4. If the reading is within the acceptable range specified on the chart, then your wrench is properly calibrated. However, if the reading is outside of this range, then it will need to be adjusted and recalibrated.

How Often Does A Torque Wrench Need To Be Calibrated?

Torque wrenches are essential tools for many industries, and it is important to make sure that they are always accurate. Torque wrench calibration should be done at least once a year, and more often if the wrench is used frequently. There are many calibration services available, and it is important to choose a reputable company. 

The calibration process usually takes a few days, and the wrench will need to be sent to the company. However, the cost of calibration is typically very reasonable, and it is worth the peace of mind knowing that your torque wrench is currently accurate.

If you use a torque wrench regularly, whether it be in the workplace or in your spare time, it’s important to check the calibration of the tool regularly. You can do this by following the steps we outlined in this blog. 

By doing so, you can ensure that your torque wrench is giving you accurate readings and that your efficiency remains at its peak. If you have any questions about calibrating your torque wrench or need help with how to calibrate a torque wrench, don’t hesitate to contact us.

GNW Instrumentation has been delivering torque wrench calibration services across the country for a vast range of clients for more than 40 years. It’s this experience, combined with highly skilled technicians that every torque wrench calibration is performed to precise and exacting standards.