When working with tools that can vibrate (e.g. pneumatically operated tools, random orbital sanders, percussion drills, etc.), vibration emissions (vibrations) occur. In the long term, poor damping or prolonged use can lead to muscular or skeletal disorders and even circulatory disorders of the hands ("white finger disease").
The maximum vibration emissions are defined by standards and must be complied with by manufacturers. For this purpose, the time of use distributed over one day/shift is taken. A distinction is made here between:
- Duration of use: results from the sum of machine use,
interruptions that are necessary for machine use
as well as break times. - Exposure time: the time for which the hand is in contact with the vibrating
surface.
Jene Begriffe sind in der DIN V 45694 definiert. Diese Emissionswerte müssen ab einer Beschleunigung oberhalb von 2.5 m/s² angegeben werden, unterhalb reicht es aus wenn folgendes angegeben wird „<2.5m/s²“. Wenn sie die reele Belastung eroieren wollen gehen Sie wie folgt vor:
- Determining the vibrations
- Compare the determined value to see if it is the same as the manufacturer's value.
- If not, apply a correction factor between 1.5 and 2 (applies to many electric and pneumatic tools).
- Read from the attached table whether the action value (100 points corresponding to daily exposure value A(8) = 2.5 m/s² and/or exposure limit value (400 points corresponding to A(8) = 5 m/s²) is exceeded.
- Documentation
- take measures
At Ingersoll Rand we have always paid attention to emissions, our tools move within an acceleration of 2 - 2.8m/s².
2 comments
Bernd Henry
Super contribution! Have long worked with so nen Schlagwergzeug. Prima Shop, hammer tool. Greetings from Erfurt! :-)
Manfred Furch
Thank you for the precise presentation of the unfortunately often unnoticed influences on the human body by machine use.