Quality      Standards      Accuracy      ISO      Serial Numbers

All Torqueleader torque equipment is used to assess and improve the quality of our customers' products, enabling their Customers to benefit from the assurance that the products will perform satisfactorily over long periods.

At Torqueleader (a registered trademark of MHH Engineering Co. Ltd) we take the subject of Quality seriously - both in the manufacture of Torqueleader tools and in the comprehensive testing of all equipment that we supply.

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Standards

MHH Engineering is assessed and registered to BS EN ISO 9001: 2008 Certificate FM 363. Hand Tools and Implements.

• MHH Engineering is assessed and registered to Ministry of Defence Standard A.Q.A.P.4 Edition 2 - Number 19 UM01. Since 1990
• All Torqueleader Tools are manufactured to the relevant British and International Engineering Standards
• All Torqueleader Tools conform to the International Standard on Torque Tools, ISO 6789:2003 or as specified

DOWNLOAD PDF - CALIBRATION INTERNATIONAL STANDARDS

All electrical equipment supplied by MHH Engineering meets the requirements of access to EU markets.

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Accuracy

Accuracy can be described in different ways by tool manufacturers:

1. As a percentage, e.g. ‘1% Accuracy'.
This is normally assumed to be ±1% of Full Scale. For example, a device reading from 40-200 N.m with an accuracy of ±1% will have a possible error margin of ±2 N.m. This is a significantly greater percentage at the lower end of the range - at 40 N.m, 2 N.m represents ±5% accuracy and not ±1% as originally perceived.

2. As a number of graduations, e.g. ‘Accuracy, ±1 graduation'. Obviously at the bottom of the range, one graduation represents 100% possible error. Percentage error decreases higher up the range.

3. As a percentage and graduations, e.g. ‘Accuracy, ±1%, ±1 graduation'. A combination of methods 1 and 2, with the resultant inaccuracy!

4. As a percentage of reading, e.g. ‘Accuracy, ±3% of reading'. Initially this may appear to be less accurate than claims of ±1%. However, note the ‘of reading' statement! Of reading means exactly that. Torqueleader use this method of guaranteed accuracy throughout the scaled range of their tools and analysers.

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ISO 6789:2003

The majority of equipment sold by Torqueleader conforms to the principal requirements of International Standard ISO 6789:2003  These Standards state:

• The effective working range of a tool is from 20% to 100% of its maximum torque value
• The accuracy requirements for Torque Screwdrivers is ±6% of reading and for Torque Wrenches is ±4% of reading, or ± 6% for Wrenches below 10 N.m
• The maximum torque value for each Square Drive size
• An overload ability of 125% of maximum torque capacity
• A Calibration life of 5000 cycles
• Test and measuring procedures, at 23° ±5°C
• The maximum permissible uncertainty of measurement of the calibration device shall be ±1% of the indicated vaule
• Scale and marking requirements

DOWNLOAD PDF - ISO 6789:2003 CERTIFICATE

DOWNLOAD PDF - ISO 90012008 Cert FM00363

DOWNLOAD PDF - Product Classifications & Certification.pdf

UKAS Accredited Calibration

Torqueleader is able to offer customers the services of a UKAS Accredited Calibration Laboratory (No: 0632).

Accreditation range: Hand Torque Tools from 0.14 to 1000 N.m to ISO 6789:2003

The accredited services offered include:

• Calibration of new Torqueleader tools
• Calibration of Torqueleader tools returned for re-calibration, repair or reconditioning
• Calibration of tools from other manufacturers
• Subject to inspection and acceptance

UKAS Certification

Torqueleader's already stringent testing and calibration procedures are performed using equipment traceable through UKAS (the United Kingdom Accreditation Service) accredited laboratories.

For customers who require a full UKAS certificate with their tools, this can be provided at an extra cost.

DOWNLOAD PDF - UKAS ACCREDITATION CERTIFICATE

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Serial Numbers

A Guide to Torqueleader Serial Numbers

All new and newly reconditioned Torqueleader tools are now marked with a Serial Number which enables Complete Traceability. This number is stored together with other data such as the original works order number and calibration details.

A = January........M = December.

A = 2002, B=2003, C=2004, D=2005 E=2006, F=2007, G=2008, H=2009 etc.

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