Posted on 26/01/2016 By Norbar Admin
Norbar’s new ClickTronic torque wrench is a mechanical “clicker” torque wrench with an electronic scale. This may lead some to wonder where this fits into a torque wrench market that already contains fully electronic wrenches and fully mechanical wrenches.
Our answer is that, for many, we believe that the ClickTronic will give the best of both worlds and to explore this statement we need to look at mechanical “clicker” wrenches and fully electronic wrenches and consider what they are best for.
Electronic wrenches are invaluable in the quality control environment or for highly safety critical application where you need greater accuracy than mechanical torque wrenches provide and/or you want to record torque tightening data. However, they need to be used very slowly and steadily to achieve high accuracy. When you are using an electronic wrench for tightening, it is normal for the target to be set and the wrench will indicate that you are approaching the target ...
Posted on 01/09/2015 By Norbar
Torque wrenches are common place across a variety of industrial processes, commercial garages and even homes wherever there is a precision assembly process utilising threaded fasteners. Considering their widespread use however, there remains a number of things that people get wrong or simply don’t know. Here Philip Brodey at Norbar Torque Tools highlights the top ten things to consider.
1. Storing your torque wrench
When a torque wrench is in regular use it does not need to be wound back. However, when storing a torque wrench for an extended period of time, users should always wind it down to the minimum scale setting and never to zero.
A fully loaded torque wrench, left in storage for a long period, can cause a ‘set’ in the spring, causing it to weaken over time. On the other end of the scale, by completely off-loading the spring, other components within the wrench may move fractionally relative to each other. When you re ...
Posted on 21/08/2015 By Norbar
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 ...
Posted on 13/08/2015 By Norbar
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.
Posted on 30/06/2014 By Norbar
Around 300,000 people in the UK suffer from Vibration White Finger (VWF) – an industrial illness caused by the use of vibrating tools and equipment. Traditionally a miners disease, widespread use of modern vibrating apparatus means workers across other sectors are now being diagnosed.
The commercial vehicle industry is one such sector and concerns are being raised about how much is being done to fully protect staff in this area from the effects of VWF.
Commercial vehicle garage workers are often expected to use an impact gun on a regular basis, but we’d suggest the use of a torque wrench instead which is not only more accurate but also protects the operator from the effects of this unpleasant condition.
If impact has to be used we would say use it sparingly and only to tighten bolts to a specific point well below the required final torque. Using a properly calibrated torque wrench beyond this point will finish the job without the dangerous vibrations.
Posted on 27/03/2014 By Norbar
Recently I was fortunate enough to embark upon a visit to the ship building region of South Korea. The south east region of South Korea, around the cities of Ulsan, Busan and Geoje Island, is home to three of the largest shipyards in the world – Hyundai Heavy Industries (HHI), Samsung Heavy Industries (SHI) and Daewoo Ship and Marine Engineering (DSME). These yards dominate the towns and landscapes that they occupy, the HHI yard for example covering an area of 1,780 acres. Amazingly, this dominant position in world shipbuilding has been reached in just 40 years, HHI’s yard having been commissioned in 1974.
The visit provided us with an invaluable insight into what our customers are experiencing in this market, their needs and how important a role torque tools and solutions play in modern marine engineering.
What became clear is that a shift has taken place in South Korean shipbuilding towards high value, high sophistication vessels. While they may still be building contai ...
Posted on 05/02/2014 By Norbar
If we asked a handful of maintenance engineers what exactly they are trying to achieve when they tighten a bolt, it’s likely that we’d receive a wide range of answers.
Strictly speaking, when we tighten bolts we’re trying to stretch the bolt enough so that the elastic tension within it clamps the assembly together. That’s right - it’s one that’s easier done than said!
In a perfect world we would always recommend measuring the tension in the bolt, as opposed to the torque, because the tension is what we really need to know. In the real world, torque is the simplest way of achieving control in threaded fasteners but it is only an indicator of the tension.
Unfortunately there is no cheap, easy, reliable way to directly measure tension in a bolt but application of known torque gives sufficient control in the majority of situations.
It is widely accepted that the majority of torque we put into a threaded fastener goes into overcoming friction in the assembly as only between ...
Posted on 02/01/2014 By Norbar
When it comes to torque wrench calibration, I often get asked “When should I re-calibrate my torque wrench? And should I wind it back to zero after use?” In fact, these two questions might well be the most frequently asked of all frequently asked questions and are rightly a subject of genuine concern for production and quality managers. To misuse the old wartime propaganda slogan a little, “Careless torque can cost lives.”
When it comes to matters of recalibration, I always refer back 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 500 ...
Posted on 31/10/2013 By Norbar
After five years working as a sales manager in Lithuania and Latvia, I am now facing the challenge of being Business Development Manager at Norbar Torque Tools in Banbury, Oxfordshire, responsible for Russian speaking countries and the Baltic States.
While working in Lithuania and Latvia, I learned a lot about the ways of doing business in both Baltic and Russian cultures. In the last 8 months I have acquired plenty of experience travelling in Russian speaking countries - particularly Russia, Belarus and Kazakhstan. The knowledge I have gained here has been fascinating and sometimes very challenging.
Take for example the business dinner (which in my opinion is one of the most important parts of my work). What do you think the dress code is there? Pretty formal? No. In Russian and Baltic cultures there are no dress codes! People can come to a business dinner just wearing shorts and t-shirt and feel very relaxed about that. However, if it is your first meeting, or a meeting with the board, they wou ...
Posted on 24/10/2013 By Norbar
Norbar’s research revealed that traditional electric torque tools were giving vastly different results depending on the joint type. The torque delivered to a hard joint could be more than double the torque that the same tool with the same settings would deliver to a soft joint with great potential to leave bolts under or over tightened and potentially dangerous. In developing our own electronic torque tool we decided that we needed radically different motor technology and control software to eliminate these issues.
Our solution needed to be accurate, efficient, ergonomic and intelligent. It needed to deliver the exact amount of torque required during the tightening or joint verification process of bolts, across a range of joint types and applications - from the commercial vehicle sector to wind energy.
Our extensive technical studies and development trials revealed the ideal formulation of motor technology, software and exterior design features required to deliver a state-of-the-art elect ...
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