Overview
ISO 28927-8:2009/Amd 2:2019 is an international standard published by the International Organization for Standardization (ISO) that defines test methods for evaluating vibration emissions from hand-held portable power tools. This specific amendment (Amendment 2) expands the scope to include oscillating knives-vibrating screen removal tools-used primarily for precise cutting tasks such as separating rubber strips from car windows.
The standard focuses on saws, polishing and filing machines with reciprocating action, and small saws with oscillating or rotating action. It provides detailed procedures for measuring vibration levels to ensure safer and more ergonomic operation for users, helping to minimize hand-arm vibration syndrome (HAVS) risks.
Key Topics
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Test Methods for Vibration Emission
Defines measurement procedures for vibration generated by various handheld power tools including oscillating knives, saws, and polishing machines.
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Inclusion of Oscillating Knives
Amendment 2 introduces specific test setups for oscillating knives with angular reciprocating blade movement, expanding the standard’s relevance to specialized tools like vibrating screen removal knives.
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Measurement Conditions
Specifies testing environment conditions such as ambient temperature (23 °C to 26 °C), use of hard rubber materials for cutting tests (Shore hardness 57 ± 5), and force application parameters (feed force of 120 ± 12 N).
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Test Setups and Equipment
Describes two standardized test jig configurations with real-time feed force measurement, ensuring consistent and repeatable vibration evaluations.
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Vibration Measurement Specificity
Emphasizes vibration values depend on the combination of the machine and specific inserted tool (knife), highlighting the importance of testing each unique setup.
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Health and Safety Considerations
Recommends ventilation or fume extraction during testing due to possible smoke emission from rubber cutting.
Applications
ISO 28927-8:2009/Amd 2:2019 serves multiple practical purposes across industries using portable power tools, particularly in:
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Automotive Manufacturing and Repair
For evaluation of oscillating knives used to remove and separate rubber seals and strips from car windows and components.
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Tool Manufacturing and Quality Control
Assists manufacturers in benchmarking vibration emissions to improve ergonomic safety and comply with occupational health regulations.
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Workplace Safety and Ergonomics
Provides employers and safety professionals with reliable methods to assess and mitigate vibration exposure, reducing the risk of hand-arm vibration injuries among operators.
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Product Development and Innovation
Enables research and development teams to optimize design features for saws, polishing tools, and oscillating knives to reduce harmful vibrations.
Related Standards
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ISO 28927 Series
Covers a broad range of hand-held power tools and their vibration emission test methods, including other parts focused on drills, grinders, and impact tools.
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ISO 868
Specifies the method to determine Shore hardness, used within ISO 28927-8 testing to specify material hardness for the test workpieces.
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ISO/IEC Directives
Governs the editorial rules and procedures for the development and maintenance of ISO standards, ensuring consistency and reliability.
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Occupational Vibration Exposure Standards
Such as ISO 5349 which deals with measuring and evaluating human exposure to hand-transmitted vibration, complementing the testing methodology of this standard.
For professionals involved in portable power tool design, manufacturing, and safety compliance, ISO 28927-8:2009/Amd 2:2019 delivers essential, practical guidance to accurately evaluate vibration emissions-enhancing product safety, regulatory adherence, and user health protection. Visit ISO.org for access to the full standard and related documents.
Open preview (PDF)Hand-held portable power tools — Test methods for evaluation of vibration emission — Part 8: Saws, polishing and filing machines with reciprocating action and small saws with oscillating or rotating action — Amendment 2: Oscillating knives (vibrating screen removal tools)