ISO 28927-9:2009

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.