BA 901/1101 en – Edition 2.1 * 91101b610.fm 6-7
Technical data
6.12 Vibration
Vibration values indicated in m/s².
Directive 2002/44/EC of European Parliament and Council on minimum health and safety
requirements regarding exposure of workers to risks arising from physical agents (vibration).
Indications on hand-arm vibration
Hand-arm vibration is less than 2.5 m/s² during correct machine operation.
Indications on whole-body vibration
Whole-body vibration is less than 0.5 m/s² during correct machine operation.
Uncertainty of measurement K has been taken into account for the specified values.
The degree of vibration is influenced by various parameters.
Some of them are listed below:
• Operator: training, behavior, working method and strain.
• Work site: organization, preparation, surroundings, weather conditions and material.
• Machine: version, seat quality, quality of suspension system, attachments and
condition of attachments.
Precise indications on the vibration degrees cannot be made for the machine.
Determination of vibration level for the three vibration axes.
• Under typical operating conditions, use the average vibration values measured.
• In order to obtain the estimated vibration value for an experienced operator on level
ground, subtract the factors from the average vibration value.
• In case of an aggressive working method or difficult terrain, add the environmental
factors to the average vibration level in order to obtain the estimated vibration level.
Note:
For further vibration indications, refer to the indications in ISO/TR 25398 Mechanical
Vibrations – Directive on Estimation of whole-body vibration during operation of earth mov-
ing machines. This publication uses measuring values of international institutes, organiza-
tions and manufacturers. It contains information on whole-body vibration for operators in
earth moving machines. For more information on the vibration values of the machine, refer
to Directive 2002/44/EC of European Parliament and Council on minimum health and
safety requirements regarding exposure of workers to risks arising from physical agents
(vibration).
It explains the values for vertical vibration under heavy operating conditions.
Directives on reduction of vibration values in earth moving machines:
• Perform correct adjustments and maintenance on the machine.
• Avoid jerky movements during machine operation.
• Keep slopes in a perfect condition.
Whole-body vibration can be reduced with the following guidelines:
Vibration
Effective acceleration value for the upper extremities of the body
(hand-arm vibration)
< Trigger value
< 2.5 m/s
2
Effective acceleration value for the body (whole-body vibration)
< 0.5 m/s
2
To Next Page
Loading...
Need help?
General
