Overview
ISO 28927-4:2010/Amd 1:2017 is an amendment to the ISO standard that specifies test methods for evaluating vibration emissions from hand-held portable power tools, specifically straight grinders. This amendment addresses the introduction of cupped wire brushes as accessories used with straight grinders, ensuring accurate and standardized assessment of vibration levels for these configurations. Vibration testing and compliance with international standards is vital for occupational health and safety, supporting risk reduction and product reliability.
Key Topics
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Test Methods for Vibration Emission:
This ISO amendment outlines procedures for measuring and reporting vibration emission values when straight grinders are used with cupped wire brushes. Accurate testing protects workers from hand-arm vibration syndrome (HAVS) and helps manufacturers comply with regulations.
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Correction Factor for Cupped Wire Brushes:
A significant change introduced by the amendment is the use of a correction factor. For grinders intended for use with cupped wire brushes, the measured vibration value must be multiplied by 1.6 to obtain the declared value. This ensures results reflect actual user exposure.
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Scope Adjustments:
The amendment updates the scope to clarify that the standard now applies to straight grinders used with wire brushes, in addition to standard grinding accessories. Importantly, it excludes die grinders with inserted tools mounted in a collet.
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Measurement Locations and Methods:
Adjustments to figures and descriptive text specify the correct measurement locations on the grinder when testing with different accessory types. Notably, references to ISO 603-14 are included for wheel dimensions.
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Reference Standards:
The amendment provides updated references to supplemental standards, such as ISO 20643 for other wheel dimensions and testing of abrasives not explicitly listed.
Applications
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Tool Manufacturers:
Manufacturers of straight grinders and cupped wire brushes must follow the amended test methods to declare vibration emissions accurately, ensuring their products meet safety and occupational health requirements.
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Occupational Health and Safety:
Employers and safety organizations use this standard to assess vibration exposure risks when operators use straight grinders with cupped wire brushes, helping to control and minimize health hazards.
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Compliance and Regulatory Bodies:
Product compliance testing and market surveillance rely on these standardized methods to verify that hand-held power tools are compliant with regional and international safety regulations.
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Research and Development:
Design engineers and R&D departments utilize the test methods outlined in the amendment to improve tool designs, reduce vibration emissions, and enhance ergonomics for end users.
Related Standards
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ISO 28927-4:2010:
The parent standard for evaluation of vibration emission of straight grinders.
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ISO 603-14:
Specifies wheel dimensions for grinding wheels used in deburring and fettling on angle grinders, referenced for compliance in measurement procedures.
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ISO 20643:
Provides general requirements and test methods for vibration emissions of hand-held and hand-guided machinery, recommended for tools or abrasive types not explicitly covered.
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ISO/TR 27609:
A technical report providing additional guidance relevant to vibration testing and assessment.
For professionals working with hand-held portable power tools, ISO 28927-4:2010/Amd 1:2017 ensures consistent, reliable vibration emission evaluation, promoting safer workplaces and supporting regulatory compliance worldwide.
Open preview (PDF)Hand-held portable power tools — Test methods for evaluation of vibration emission — Part 4: Straight grinders — Amendment 1: Cupped wire brushes
