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The complications of ISO standards

In my last blog I explained that the working group for torque wrenches had been meeting since 2008 to revise and develop the existing standard for torque wrenches ISO 6789:2003.   The project has taken far too long and sometimes people ask me why we have not finished before. In the following paragraphs I will try to explain some of the reasons, from my perspective. My aim is to give you an insight into standards preparation.   Every ISO standard has an owner, in the form of a Technical Committee. ISO/TC 29 looks after “small tools” which includes drills, milling cutters, abrasive grinding discs as a well as hand tools. The area of spanners, screwdrivers etc are defined as “Assembly tools for screws and nuts” and these are the responsibility of a Sub-Committee called ISO/TC 29/SC 10. Sub-Committees are populated with delegates from member countries. In ISO/ TC 29/SC 10 we have 10 countries who are registered as participating and 16 countries who are observing. More informa ...

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One Man and His Dog

As a lad I was always fascinated by the TV show ‘One man and his dog’ as a farmer, usually from Wales or the ‘bleak North’ would gather sheep of various levels of intelligence and commitment to the cause into a pen, against the clock but with other criteria such as style (or some other qualitative factor) being important to the outcome. This was prime time telly and strangely absorbing.   And so it is with being a Process Stream Manager as you stand there with your metaphorical crook and pipe (to make you look unflappable) gazing out over your flock as they all walk in the right direction in a timely manner taking care of all qualitative matters. Then one day the company asked if my Process Stream could take cost out of the Torque Wrench Body Tubes by moving some of the sub contracted operation in house. We were to start with surface preparation and investigations were undertaken with suppliers of the equipment who were more than happy to sell us kit confidently exclaiming wit ...

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Let’s talk cycle torque!

Cycling is a growth sector in the UK. Whether it’s because of Bradley Wiggins, Chris Froome, Chris Hoy or Team Sky at the Tour de France, cycling traffic has increased every year since 2008 – roughly about the time that the British first realised we were getting quite good at it.


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Challenging Times

UK manufacturers are now reporting a slowdown in order intake particularly in Export sales, hindered somewhat by the strong pound and the potential Greek exit of the Euro. Inventory and supplier rationalisation, volatile commodity prices and zero inflation, the list could go on but in short, it is getting tough out there!   There is a subtle difference between being able to “respond” rather than “react” when faced with challenging times. This is often the difference in taking sound business decisions rather than adopting a short term emotive response but it does rely on strong leadership and an agile team approach.   Whilst we at Norbar have no direct control over what happens in the wider economy, we can influence the impact this has on our business when it comes to People, Process, and Performance.   At our recent European Distributor Seminar in Geneva, we discussed at length the “Supply chain value” and the integral links between “Product, Ima ...

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The EvoTorque and Voltage Drop

My name is Mark Hadfield and I am one of the Technical Sales Engineers based at Norbar in Banbury. One of our roles is to liaise with our distributors and customers to provide solutions to any issues they may have with any Norbar products.I was involved with the original testing of the EvoTorque prior to its launch and have been closely involved with the use of the tool ever since.    The EvoTorque, in common with other mains powered tools, is often used with an extension lead. This, in turn, has lead to questions from Customers and Distributors as to the effect of voltage drop on the EvoTorque. For an AC tool voltage drop describes how the supplied voltage is reduced as electric current moves through the passive elements (in this case the cable) of an electric circuit. This is caused by the internal resistance of the cable and the resistance to change of current (Reactance). Together they are called Impedance.   We knew the EvoTorque exceeded the minimum requirements for minimum and maximu ...

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ISO 6789: 2016 takes a step closer in New York

As the UK lead delegate for the ISO TC29 SC10 technical committee, I have the honour to represent the UK in drafting standards for tightening tools. The meetings are hosted by different national delegates each time and last week the meeting was in New York, with delegates from seven countries. One of our key standards is ISO 6789. This torque wrench standard is now 12 years old and the new standard being developed will continue to specify requirements for design, manufacture and  calibration. Overall the main purpose of our work is to improve the performance of torque wrenches and to ensure consistent calibration results from different laboratories.   There are two significant changes this time. One is to separate the calibration requirements into Part 2, leaving the design and manufacturing requirements in Part 1. The second is to provide a method for calibrating the measurement device used to calibrate the torque wrench. In the UK we have a perfectly good stand ...

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Training and Flexibility of Staff

When faced with a variable workload with regards to volume and differing parts over a number of shifts, the question always arises as to how be the most effective way of managing resource. On two of our shifts the work centres outnumber the staff; therefore flexibility of staff is essential to enable the planning function to run the work centres they need to meet demand.   To control and maintain the flexibility on any shift, the manager uses a training matrix to register all aspects of staff training, safety manning levels are set for each critical work centres. If staff levels drop below the safety number, the shift manager will take appropriate action to bring the level back to the agreed number. This allows the shifts to cover all work centres through periods of holidays and absence. One area of flexibility that can easily be overlooked, is ensuring that once a member of staff has been trained to the relevant level, that skill level is maintained.. This is dealt with by transferring staff around th ...

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More, more, more!

Interacting and engaging with prospects at exhibitions is probably top, or very close to the top, of every exhibitor’s wish list. How this is best achieved will depend on a multitude of factors such as; the type of exhibition, the product or service being exhibited, and the audience. However attracting visitor’s attention, and creating stand-out is absolutely essential. During the regional trade shows of 2014, Norbar was able to assess what customers and prospects wanted from Norbar at events, and then how it could deliver on this. As the leading Torque Tool manufacturer Norbar wanted to be able to: ·         Interact and engage with visitors ·         Tailor each show presence to the audience ·         Use video to highlight products features and benefits ·         Give product demonstrations &m ...

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Truck and Bus Wheel Safety

If you have ever wondered about the impact of a detached truck wheel hitting a car at 50mph, Michelin North America and the Tire Industry Association have produced a great video that answers the question.  Go to YouTube and look up “Wheel End Safety 3 of 3”.   Whenever I talk to people about the importance of truck and bus wheel bolting to avoid “wheel off” accidents my comments are met with a sceptical “when does that ever happen?” response.  However, it certainly does happen and I believe that it is more common than most people realise.  While you are on YouTube looking at the Michelin video, you will also find numerous examples caught on camera.   In fact, according the Brake – the road safety charity – it is estimated that there are several hundred instances of wheel detachment per year in the UK alone.  16% of these result in accident, 4% in fatality so this is a relatively common and serious issue.   Of course, torq ...

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Torque Screwdriver Application - An Audio Loudspeaker



It’s not just large industries like Automotive and Oil & Gas which require torque precision, even high quality audio loudspeakers will have a specified torque for the drive unit bolts. 


On Naim NBL speaker pictured above, a Norbar TTs Torque Screwdriver is being used to accurately achieve the 3.6 N.m for the mid-range drive unit. Norbar recommends that Hi-Fi dealers and audio enthusiasts check the speaker drive unit bolts to achieve best audio performance.


Norbar's range of Torque Screwdrivers embodies the values of the TT Series brand: accuracy, ease of use and comfort in use.


With an accuracy that exceeds the requirement of ISO6789 (+/-6% for tools up to 10 N·m). Furthermore, they are engineered to retain this accuracy over many thousands of tightened cycles.

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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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