Did you know that the ISO6789 Standard which defines torque wrench calibrations has been updated?
The standard is now split into 2 Parts. Norbar is able to comply with both parts of the standard.
Part 1 – Torque wrenches will be supplied with a Declaration of Conformance.
Part 2 – Torque wrenches will be supplied with a Calibration Certificate (defines the accuracy uncertainties of the wrench in more detail).
All companies should check with their Quality documentation to ensure that they are getting the certification required for their business. For support and enquires, contact ISO6789@norbar.com.

Part 1 – ISO 6789-1:2017
Central Service Centre:
45-47 Raglan Ave
Edwardstown SA 5039
Tel: +61 (0)8 8292 9777
Email: norbar@norbar.com.au
Mackay Service Centre
2/36 Transport Avenue
Paget QLD 4740
Tel: +61 7 4953 9000
Email: salesmackay@norbar.com.au
Eastern Service Centre:
Unit 5/55 Donaldson Road
Rocklea QLD 4106
Tel: +61 (0)8 8292 9777
Email: norbarQLD@norbar.com.au
New Zealand Service Centre:
B3/269A, Mt Smart Rd Onehunga
Auckand 1061
Tel: +61 (0)8 8292 9777
Email: norbarNZ@norbar.com.au
Western Service Centre:
Unit 2, 22 Chullora Bend
Jandakot WA 6164
Tel: +61 (0)8 8292 9777
Email: norbarWA@norbar.com.au
Part 2 – ISO 6789-1:2017
NATA Calibration Lab
45-47 Raglan Ave
Edwardstown SA 5039
Tel: +61 (0)8 8292 9777
Email: natalab@norbar.com.au
Key Changes
Regardless of performing Part 1 or Part 2 of the standard the following 4 points apply:
Frequently Asked Questions
Why did the standard change happen?
How do I reduce parasitic forces (side loads)?
Can my ISO loader or TWL be upgraded to meet the requirements of BS EN ISO 6789:2017?
I have an IS01500 or a TWL which I bought before this change. Why did you sell it to me?
If I remove and replace the FMT on my TWC with an angular offset will it affect my uncertainties?
If I calibrate using the short length reaction arm why is there no counter balance?
Can I use my Protest with the TWC?
When using my T Box (ISO 6789:2017 part2) are the uncertainties recorded in any particular order e.g. Drive adaptor 1st?
Why 2 parts?
Part 1 allows for the manufacture to produce a document of conformance in accordance to the standard, it also details how the tool should be checked and what measurement considerations should be applied. This gives you a DECLARATION OF CONFORMANCE
Example user aftermarket vehicle repairs/tyre fitting where knowing the tool is fit for purpose is paramount. Part 2 carries over part 1 measurement methods but includes detail of the uncertainties and associated tests which need to be factored in to produce a CERTIFICATE OF CALIBRATION.
Example user Aerospace industry/Medical industry where performance and understanding of the tool are paramount.
How to measure the 80% to 100% final application of torque
What will happen if I ignore the revised standard?
How do I check and record uncertainties for adaptors, ratchets and handle point of contact and reproducibility in accordance with the requirements of the new standard?
If I have a transducer calibrated and its uncertainties change do I need to update my uncertainty budget within TDMS?
Will my TTT/TST and transducer system work with the TWC?
Can I use my ETS torque transducer equipment with the TWC?
Norbar’s transducers are typically better than class 1 for the primary classification range as per BS7882:2008 (±0.5% reading from 20% to 100% of full scale). How will this translate to a maximum uncertainty interval required for EN ISO 6789 part 1 & 2?
See table below:
For Part 2, the uncertainty interval of a Norbar transducer will be typically <=±1.0 making it suitable for a calibration of a torque tool requiring a 4% expected maximum relative measurement uncertainty interval. However the following table may be used as a guide. The transducer needs to comply with the classification and corresponding uncertainty interval.