What is EN ISO 6789:2012

EN ISO 6789:2012 is a technical standard that specifies the requirements and testing methods for hand torque tools. These tools are widely used in various industries, such as automotive, aerospace, and manufacturing, for tightening or loosening fasteners.

Scope of EN ISO 6789:2012

The scope of EN ISO 6789:2012 covers hand torque tools with an adjustable torque setting mechanism. It provides guidelines for the design, performance, calibration, and use of these tools to ensure accurate torque application.

The standard applies to both manual torque wrenches and power torque tools, including electric, pneumatic, and hydraulic torque tools. It also covers torque multipliers and torque screwdrivers within certain limits of torque capacity.

Key Requirements of EN ISO 6789:2012

EN ISO 6789:2012 establishes specific requirements that hand torque tools must meet to ensure their accuracy and reliability. Some key requirements include:

Mandatory calibration before first use and after a specified period or number of cycles

Clear and easy-to-read torque scale displayed on the tool

Proper ergonomics and gripping features for comfortable use

Ability to apply torque in one direction only to avoid potential damage

Tightening angle indication for tools equipped with angular measurement feature

Traceability of calibration and maintenance records

Testing Methods for Compliance

To ensure compliance with EN ISO 6789:2012, hand torque tools undergo various tests, including:

Verification of torque accuracy at different levels on a calibrated test rig

Determination of repeatability and reproducibility using statistical methods

Evaluation of durability through cycles of torque application under specified conditions

Assessment of ergonomics and usability by human factors and ergonomic studies

In conclusion, EN ISO 6789:2012 provides industry-standard guidelines for the design, performance, calibration, and use of hand torque tools. Adhering to this standard ensures that these tools deliver precise and reliable torque application, ultimately contributing to the safety and quality of various products in different sectors.