ISO 6789-1:2017
Assembly tools for screws and nuts — Hand torque tools — Part 1: Requirements and methods for design conformance testing and quality conformance testing: minimum requirements for declaration of conformance
ISO 6789-1:2017 specifies the conformance testing and marking requirements for hand torque tools used for controlled tightening of screws and nuts. It also specifies the minimum requirements for declaration of conformance for hand torque tools.
ISO 6789-1:2017 applies to hand torque tools which are classified as indicating torque tools (Type I) and setting torque tools (Type II).
NOTE Hand torque tools covered by this document are those identified in ISO 1703:2005 by reference numbers 6 1 00 11 0, 6 1 00 11 1 and 6 1 00 12 0, 6 1 00 12 1 and 6 1 00 14 0, 6 1 00 15 0. ISO 1703 is currently under revision. In the next edition, torque tools will be moved to an own clause, and with this change the reference numbers will also change and additional reference numbers will be added.
ISO 6789-1:2017 does not specify requirements of calibration certificates for hand torque tools. These are described in ISO 6789‑2.
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms, definitions and symbols
3.1 Terms and definitions
3.2 Symbols, designations and units
4 Classification
5 Requirements
5.1 Design conformance testing
5.1.1 General
5.1.2 Maximum torque values
5.1.3 Specified torque range
5.1.4 Scales, dials and displays
5.1.5 Maximum permissible deviation
5.1.6 Overloading test
5.1.7 Endurance test
5.1.8 Effect of geometric changes
5.2 Quality conformance testing
5.3 Conformance test during use
6 Torque measurement
6.1 Torque measurement system
6.2 Application of torque
6.3 Ambient conditions
6.4 Measurement requirements
6.5 Measurement sequence
6.5.1 General
6.5.2 Indicating torque tools, Type I
6.5.3 Setting torque tools, Type II
7 Calculation of deviation
7.1 General
7.2 Calculation example 1
7.3 Calculation example 2
8 Declaration of conformance
9 Marking
Annex A (normative) Examples of indicating torque tools (Type I)
Annex B (normative) Examples of setting torque tools (Type II)
Annex C (informative) Measurement sequence flowchart for torque tools
Bibliography
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms, definitions and symbols
3.1 Terms and definitions
3.2 Symbols, designations and units
4 Classification
5 Requirements
5.1 Design conformance testing
5.1.1 General
5.1.2 Maximum torque values
5.1.3 Specified torque range
5.1.4 Scales, dials and displays
5.1.5 Maximum permissible deviation
5.1.6 Overloading test
5.1.7 Endurance test
5.1.8 Effect of geometric changes
5.2 Quality conformance testing
5.3 Conformance test during use
6 Torque measurement
6.1 Torque measurement system
6.2 Application of torque
6.3 Ambient conditions
6.4 Measurement requirements
6.5 Measurement sequence
6.5.1 General
6.5.2 Indicating torque tools, Type I
6.5.3 Setting torque tools, Type II
7 Calculation of deviation
7.1 General
7.2 Calculation example 1
7.3 Calculation example 2
8 Declaration of conformance
9 Marking
Annex A (normative) Examples of indicating torque tools (Type I)
Annex B (normative) Examples of setting torque tools (Type II)
Annex C (informative) Measurement sequence flowchart for torque tools
Bibliography