VIBRATION
The European Physical Agents (Vibration) Directive has been brought in to help reduce hand
arm vibration syndrome injuries to power tool users. The directive requires power tool
manufacturers and suppliers to provide indicative vibration test results to enable users to
make informed decisions as to the period of time a power tool can be used safely on a daily
basis and the choice of tool.
Further Advice can be found at www.hse.gov.uk
Vibration:
Vibration total values (triax vector sum) determined according to EN ISO11806, EN ISO
10517
Grass trimmer operation
Left handle (at idling)
2
Vibration emission value ah=3.192 m/s ,
2
Uncertainty K = 1.5 m/s
Left handle (at racing)
Vibration emission value ah=8.935 m/s
2
Uncertainty K = 1.5 m/s
2
Right handle(at idling)
Vibration emission value ah=2.475 m/s
2
Uncertainty K = 1.5 m/s
2
Right handle (at racing)
Vibration emission value ah=9.839 m/s
2
Uncertainty K = 1.5 m/s
2
Hedge trimmer operation
Left handle (at idling)
Vibration emission value ah=6.477 m/s
2
Uncertainty K = 1.5 m/s
2
Left handle (at racing)
Vibration emission value ah=17.373 m/s
2
Uncertainty K = 1.5 m/s
2
Right handle (at idling)
Vibration emission value ah=4.960 m/s
2
Uncertainty K = 1.5 m/s
2
Right handle (at racing)
Vibration emission value ah=16.695 m/s
2
Uncertainty K = 1.5 m/s
2
The declared vibration emission value should be used as a minimum level and should be used
with the current guidance on vibration.
Calculating the actual period of the actual period off use can be difficult and the HSE website
has further information.
The declared vibration emission been measured in accordance with a standard listed test
stated above and may be used to compare one tool with another. The declared vibration
emission value may also be used in a preliminary assessment of exposure.
WARNING! The vibration emission value during actual use of the power tool can
differ from the declared value depending on the ways in which the tool is used
dependant on the following examples and other variations on how the tool is
used:
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