Overview
EN ISO 28927-7:2009 (ISO 28927-7:2009) defines a laboratory, type‑test method for measuring hand‑transmitted vibration from hand‑held power nibblers and shears. The standard specifies how to measure vibration at the gripping areas of nibblers and shears (pneumatic or otherwise) when cutting sheet metal or composite materials. Results are intended for comparing different models of the same machine type and for supporting conformity assessment.
Key topics and technical requirements
- Scope: Applies to nibblers and shears used for cutting sheet metal and composites; covers tools driven pneumatically or by other power sources.
- Measurement focus: Hand‑transmitted vibration at the tool handles - measured to characterise vibration emission in the operator’s grip areas.
- Three‑axis measurement & hand positions: The standard updates previous practice by specifying measurement in three orthogonal axes and at both hand positions where applicable.
- Transducer locations and orientation: Defined mounting positions for accelerometers/transducers on the handles to ensure repeatable, comparable data.
- Instrumentation requirements: Includes requirements for transducers, mounting, frequency‑weighting filters, integration time, calibration and auxiliary equipment.
- Testing conditions: Specifies machine operating conditions, attached equipment/workpiece setup, and operator considerations to ensure valid, reproducible tests.
- Data reporting & verification: Defines reported vibration values, declaration and verification procedures, and a model test report (informative Annex A).
- Uncertainty assessment: Normative guidance on determination of measurement uncertainty (Annex B).
- Regulatory context: Includes informative annexes (ZA and ZB) describing the relationship to EU Machinery Directives (e.g., 98/37/EC, 2006/42/EC) and presumption of conformity where applicable.
Applications and who uses it
- Manufacturers and R&D teams use the standard to quantify and compare vibration emission across models during design and product development.
- Independent test laboratories apply the method for type‑testing, certification and supplier validation.
- Compliance and safety engineers rely on standardized vibration data for risk assessment and to support CE marking or regulatory claims.
- Purchasing/procurement teams and fleet managers use standardized comparisons to select lower‑vibration tools and reduce operator exposure.
- Ergonomists and occupational hygienists use the data to inform vibration exposure assessments and control measures.
Related standards
- Part of the ISO 28927 series (test methods for vibration emission of various hand‑held power tools).
- Supersedes ISO 8662‑10:1998 and provides harmonised guidance for conformity with relevant EU machinery directives (see Annex ZA/ZB).
Keywords: EN ISO 28927-7:2009, ISO 28927-7:2009, vibration emission, hand‑held power tools, nibblers and shears, hand‑transmitted vibration, test method, type‑test, measurement, calibration, transducer.
