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The selection and use of torque wrenches

One of the more frequently asked questions from our customers is “how do I select the correct torque wrench for application?” Generally, most torque wrenches are used for tightening nuts and bolts accurately. Nuts and bolts need varying degrees of accuracy depending on the materials being fastened together, and therefore, there are different wrenches for different applications. The two main reasons why we use torque wrenches are to achieve the correct level of tightness and then to ensure consistency across all of the bolts in the assembly. Used properly, a torque wrench will ensure that all bolts have the same level of torque applied. The effect of badly tightened bolts can be seen in lost time and money. It’s also worth noting that careless torque can cost lives. The most common torque wrench is called a click wrench. This wrench is used to tighten bolts and nuts and will indicate when a pre-set torque has been reached. The pre-set value can be set by the user, or by a quality control ...

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The Norbar Apprentice

It’s been another few months since my last blog and again, plenty has changed on my apprentice journey at Norbar Torque Tools. My second year is now complete and I’ve been working full-time over the summer on the shop floor. Safe to say, it’s been an eventful few months and I’ve been able to gain further valuable exposure into the day to day running of Norbar Torque in the UK. In the past six months alone I’ve been placed in Goods In at both Norbar sites in Banbury, with the Stores team where jobs are prepared for processing, and then in the Torque Multipliers Department. I’ve also recently completed my 10 week HNC manufacturing bridging course so I can take on the full version of the course that begins in September. I’ll be undertaking this one day per week at college over the next two years. There’s a noticeable jump between second year and third year at college so I was grateful for the support and opportunity to take the bridging course – especi ...

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Fake, counterfeit, and cloned products

Sam Ortolani is a torque specialist, based at Norbar Torque Tools Inc. over in the USA. Here he discusses the issues surrounding fake, counterfeit and cloned products in the automotive aftercare market. We have all heard the stories about fake, counterfeit, and cloned products. Every few months another story makes the national news. Whether it is toothpaste that contains anti-freeze, or baby food that leaves dozens dead, or it is children’s toys that contain lead paint, these stories all emphasize one or two common threads. One, counterfeiting and cloning products is a big and fast growing business, and two, sometimes the results can be tragic. Fake, counterfeit, and cloned products might be produced with the best of intentions, if we are liberal in applying doubt. More likely though, they are to be predatory – to bite into a market that some company spent years in order to become experts. To be sure, there is never a shortage of people who are lured by saving a few pennies in the spirit of bei ...

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How often should I recalibrate my torque wrench?

This might well be the most frequently asked of all frequently asked questions and is rightly a subject of genuine concern to production and quality managers.   To answer the question, I am going to look to the standard BS EN ISO6789 – “Assembly tools for screws and nuts – Hand torque tools – Requirements and test methods for design conformance testing, quality conformance testing and recalibration procedure”. Unsurprisingly, most of us refer to it as “the torque wrench standard”!   In 1992, ISO 6789 was very much a document covering the design and manufacture of torque tools and the requirement was that the tool should be tested at maximum capacity for 5000 cycles in each direction. No guidance was given on recalibration intervals.   However, when the standard was revised to the 2003 edition, the scope was broadened to include “quality conformance testing and recalibration” and so became of relevance to people using torque wrenches ra ...

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Water valve actuation

Opening and closing water valves can be very difficult due to the amount of pressure behind them and rusting of the mechanism.  The previous method for completing this task required the use of a large stilson wrench.  Due to size of the valve, pressure on the gate, or scale on the components, the torque required to actuate the valve by hand was unsafe and could potentially cause long term injuries due to excessive physical actvity. The previous method was also time consuming due to the limited space for operation of the stilson wrench. The solution is to utilise the Norbar CTM-72-1250 Valve Actuation Tool and a custom designed reaction arm/assembly to safely actuate the valve.   The Norbar CTM-72-1250 Valve Actuation Tool has a 3 speed concept that delivers the benefit of fast run down speeds when minimal load is required when actuating the valve and low speed high torque setting to assist when loads are high. The CTM-72-1250’s operation is quiet, less than 70dB (A) w ...

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Norbar - a potted history

For the many of you who probably don’t know, Norbar is a family owned and run business. Whilst in 2012 we have quite the global reach, we did have more humble beginnings. How does that phrase go again? “You don’t know where you’re going until you know where you’ve been”? Well, here’s a potted history of our life so far… In 1942, at the height of World War 2, Bill Brodey was engaged in selling various tools and machines including Joseph Sunnen honing machines used for honing cylinder bores of engines. Torque wrenches were already being imported and sold alongside the honing so it was smart business sense (supply and demand) when Bill and his friend Ernest Thornitt applied to the UK Ministry of Supply requesting permission to manufacture torque wrenches in the UK.   Torque wrenches were very much in demand for the manufacture of Rolls Royce Merlin aero engines and the UK Government was keen to manufacture in the UK wherever possible to reduce pressure on t ...

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Product Selector

Finding the correct torque tool for your specific application is essential to ensure torque is applied accurately and with maximum ease.

Use our Product Selector to find exactly the right Norbar tool for the job.

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Find a Distributor

There are Norbar companies in the UK, North America, Australia, New Zealand, Singapore, China and India, together with a network of specialist distributors in most countries.

Select any region on our world map for contact details.

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Download Catalogue

Details of Norbar’s extensive range of torque wrenches, multipliers and equipment for measurement and calibration can be downloaded in our comprehensive online product catalogue.

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Norbar Videos

Norbar’s collection of training videos.

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Norbar News & Updates

Read about Norbar’s news and developments in the UK and across our international network for the latest updates on the fascinating and fast-moving world of precision torque engineering.

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Download Our Apps

Norbar apps are available free for download on Android and iPhone and are invaluable tools for engineers.

Our Torque Unit Converter provides instant conversion across Metric, SI and Imperial units.

The Torque Extension app calculates the exact torque wrench setting value for required level of torque to be applied.

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FAQ

Precision torque engineering is a wide and complex field which is critical to many sectors of industry and poses many questions to those seeking information about its features and practical applications.

Here are some of the key queries we regularly encounter.

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Use Our Calculators

Norbar has devised easy-to-use online calculators that support the correct application of torque in three key areas:

  1. Unit conversion to assist international measurement definitions.
  2. Torque extension for setting correct values
  3. Torque tension to identify precise levels of torque to be applied for individual applications.

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