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Norbar - A Potted History

05 Apr, 2013 | Return|

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 the Atlantic supply convoys. Consequently, permission was granted to ‘The North Bar Tool Company’ to start manufacturing torque wrenches in ‘North Bar Place’, Banbury in the United Kingdom. The address ‘North Bar’ gave the company its name and this was later contracted to ‘Norbar’. Minus a slight change of track when the market for Merlin aero engines dried up, the North Bar Tool Company continued its work in the aerospace industry, manufacturing a range of specialist fitting tools, along with torque wrenches.

In 1952, Bill Brodey’s eldest son Ian joined the company. Ian was a graduate in Mechanical Engineering from Loughborough College of Technology and brought a new level of professionalism to the company’s engineering activity, producing drawings for all components for the first time and expanding the product range. In 1957, Bill’s younger son John joined the North Bar Tool company as the first full time salesman.

In 1953 a project for the engineering company and bolt manufacturer GKN took the North Bar Tool Company in a new product direction. GKN had designed a bolt called ‘Prolong’ that had a splined section above the nut. By griping the splined section of the bolt and counter rotating the nut, the fastener could be tightened without the need for any external reaction device. In a further development, a shear groove was placed below the spline, so designed that the bolt would fail at the groove when the pre-determined torque had been achieved. This bolting method was known as ‘Torshear’. GKN required an air driven tool capable of high torque output to sell with their ‘Prolong’ bolts. Probably Britain’s best known gearbox designer of the time was Dr. H.E Merritt and so Dr. Merritt was contracted to design a suitable range of air driven gearboxes for the Torshear application.

The Torshear bolting method was not a commercial success so North Bar added reaction arms to their gearboxes and called them PneuTorque® in the case of the air driven versions and the hand operated versions were named HandTorque®. This was really a defining moment in Norbar’s history as the evolutions of the above products still form part of the company’s range today.


In part two of our potted history, I’ll address the years since and how the company developed globally. Dr. Merritt design was the Slimline™ torque wrench mechanism. Prior to the ‘Slimline’ Norbar torque wrenches used an external, break-back mechanism. The ‘Slimline’ was the first Norbar design to completely contain the mechanism within the body tube of the wrench, hence the ‘Slim’ reference. The ‘Slimline’ torque wrench was launched in 1963 and some models remain in production today. Variations in this mechanism underpin most of Norbar’s current torque wrenches.

Norbar has manufactured torque testers for almost as long as they have manufactured wrenches. The earliest types employed a simple spring balance attached to a pivoted bar. The next evolution was to utilise a hydraulic cell and hydraulically activated gauge. The ‘Static Torque Meter’ was much more compact than the earlier versions and were easier to use because this system avoided the needle fluctuations of the spring balance type. This product enjoyed a near 50 year life span before finally being rendered obsolete by electronic measurement methods. The first reference to a Norbar electronic torque analyser is dated 1967. The display unit, incorporating an analogue gauge similar to a Voltmeter, was attached by a cable to a separate, strain gauged torque transducer. Forty five years later, this essentially remains the method of measuring torque although the electronics are now based on single-board computer technology with such features as colour display and touch sensitive screen.

1969 was a landmark year and saw the company’s first address change bringing with it the official change in name from ‘The North Bar Tool Company’ to ‘Norbar’ (which had previously been used as a telegraphic address). The new premises on Swan Close, Banbury, were originally 9,000 sq.ft but were extended twice before being outgrown and Norbar moved again to Beaumont Road, Banbury in 1984. A major extension to this site in 1989 took the floor area to 45,000 sq.ft and further extensions and mezzanine work give a current day total of 52,000 sq.ft of production and office space.

In November 1989, Norbar became the first torque tool manufacturer in the United Kingdom to have a torque laboratory accredited by the governmental, third party body ‘NAMAS’ (National Measurement Accreditation Service). In 1995 the non-profit distributing private company ‘UKAS’ United Kingdom Accreditation Service was formed and took over this accreditation role. Norbar’s laboratory, number 0256 has an accredited calibration scope from 0.005 N.m to 108,500 N.m. Since 1996 Norbar has been establishing overseas offices for the purpose of product distribution and service. Norbar Torque Tools Pty. Ltd in Australia was the first and was then followed by the United States, New Zealand and Singapore.


In January, 2012, Norbar’s wholly owned trading and service company opened for business in Mumbai, India. The companies in Australia, USA, Singapore and China each have a calibration laboratory with a similar scope of ability to the UKAS accredited laboratory in the United Kingdom. Each of these laboratories has accreditation by a local third-party body ‘NATA’ in the case of Australia, ‘NVLAP’ for USA, ‘SAC-SINGLAS’ for Singapore and ‘TAF’ for China. And this concludes our potted history so far, the rest they say is history.


Neil Brodey

Managing Directo