Understanding the Importance of Torque Tool Calibration

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Russ Edwards

Published on 28 May 2021

As with any valuable equipment in the modern workplace, the importance of torque tool calibration can often be overlooked when it comes to ensuring its accuracy is maintained. In this post, we look at what torque wrench calibration is, why it is so important, and how it is performed.

What is Torque Wrench Calibration?

Calibration is the process of comparing a digital or analogue torque wrench tool against a fully traceable and higher accuracy reference device, the results of which are then documented for full compliance, essential for auditing and ISO purposes.

Why Invest in Torque Wrench Calibration Services?

Arguably the most disregarded aspect in equipment maintenance, the calibration of a torque tool is crucial to ensure the longevity and accuracy of your instrument. Whether your industry is aviation, maritime, motor, nuclear or offshore, your torque wrench must operate within strict parameters, known as tolerances. This guarantees the correct force is being applied when tightening nuts and bolts and failure to do so may result in an unreliable connection leaving the whole structure vulnerable.

Fortunately, torque tool calibration does not need to be a complicated or laborious task. The simplest and most precise way to manage your maintenance procedures is to outsource to a qualified testing laboratory specialising in torque tool calibration. Whilst some may feel that outsourcing can be costly, once the mounting cost of test equipment, staffing expenses and training time is considered, it can be debated to in fact be excellent value.

Torque wrench calibration using GNW Instrumentation costs from as little as £25, which is a small price to pay for the peace of mind that calibration provides.

How is my torque tool calibrated?

Your torque wrench should be calibrated regularly – typically once a year or every 5,000 uses, whichever the sooner.

GNW Instrumentation can test the tolerances of your torque calibration tool within a range as low as 1Ncm (or 0.01Nm) up to 2,000Nm against their master test equipment. Provided it falls within a 4-6% tolerance in accordance with ISO 6789, it will be certified as passed and a fully traceable test certificate will be issued. There would be no adjustments or repairs at this stage – a repair quote would need to be provided and accepted prior to any additional works being completed and the calibration procedure carried out again.

Who should I choose to calibrate my torque tool equipment?

For nearly 50 years, GNW Instrumentation has established an excellent reputation for quality repair and calibration work whilst maintaining excellent customer service throughout.

GNW can repair torque equipment from any manufacturer including (but not limited to) Draper, Teng Tools, Snap-On and Norbar. With a wide scope of test ranges for all equipment repaired and calibrated, in addition to a competitive pricing structure, we are confident you will agree we are an invaluable asset to your maintenance programme.

 

Where can I get my torque wrench calibrated near me?

GNW Instrumentation understands that your equipment is required back as soon as possible to avoid disruption to your workload. Our skilled technicians can calibrate both in-house at our calibration facility or on-site at your location within the UK. You can either send your torque wrench tool to us using your own courier, or we can arrange one on your behalf. In some circumstances, we can even have it back to you the same day.

Summary

In conclusion, the calibration of your torque tool equipment should be an important part of your working processes.

  • Failure to calibrate could result in over or under-tightening of fasteners.
  • Outsourcing to a qualified testing lab is the simplest and often cheapest way to manage calibration.
  • Calibration should be performed regularly, no less than once a year.
  • GNW can handle your requirements professionally and efficiently with minimal disruption.

If you find yourself needing torque tool calibration, here at GNW we can support your needs, simply call one of our friendly experts on 01704 536010 or email us at sales@gnw.co.uk and we will get back to you.