Overview
ISO 28927-9:2009 - Hand-held portable power tools - Test methods for evaluation of vibration emission - Part 9: Scaling hammers and needle scalers - is a laboratory type-test standard that defines how to measure hand-transmitted vibration at the handles of scaling hammers, needle scalers, engraving pens and scabblers. Published in 2009, the standard provides a reproducible method to quantify vibration emission so different machine models can be compared under specified test conditions.
Key Topics
- Scope and applicability: Applies to pneumatic and other driven machines used for paint, rust or scale removal with reciprocating work tools or needles and for various materials.
- Measurement focus: Hand-transmitted vibration at the gripping areas (handles) - measurements are taken in three axes and at both hand positions to reflect realistic exposure.
- Test setup: Machines are run against a steel plate or concrete block to ensure consistent support and reproducibility of results.
- Transducer placement and instrumentation:
- Transducers are positioned close to the hand (area between thumb and index finger) to minimize operator disturbance.
- Requirements cover transducer specification, fastening, frequency-weighting filters, integration time, calibration and auxiliary equipment.
- Operating conditions: Specific guidance for pneumatic, hydraulic and electrical machines to ensure repeatable type-test conditions (feed force, inserted tool condition, machine settings).
- Data reporting and validity: Declaration and verification procedures, reported vibration values, and uncertainty estimation (see annexes for model test report and uncertainty determination).
- Practical note: Results are representative of the upper-quartile average in typical use; ISO recommends using 2.5 m/s² as a conservative value when reported emission values fall below that level for workplace estimation.
Applications
- Manufacturers: Type-testing product lines to publish declared vibration emission values and optimize designs for lower hand-transmitted vibration.
- Test laboratories: Performing standardized vibration emission measurements for certification, product comparison and R&D.
- Occupational health & safety professionals: Using type-test data to compare tools and inform selection, though workplace exposure assessments should follow ISO 5349 for task-specific measurements.
- Procurement and compliance: Selecting tools with lower declared vibration emission values and verifying supplier claims.
Related Standards
- ISO 20643 - Principles for evaluation of vibration emission
- ISO 5349 - Measurement and evaluation of human exposure to hand-transmitted vibration
- ISO 5391 / ISO 17066 - Vocabulary for pneumatic/hydraulic tools
- EN 12096 - Declaration and verification of vibration emission values
- ISO 2787, ISO 630 - Supporting references for equipment and materials
ISO 28927-9:2009 is part of the ISO 28927 series of vibration test codes and is essential for consistent, comparable evaluation of vibration emission from scaling hammers and needle scalers.
Open preview (PDF)Hand-held portable power tools — Test methods for evaluation of vibration emission — Part 9: Scaling hammers and needle scalers