DEWALT 's range of Power Tools offer leading vibration levels. DEWALT continues to use innovative technologies to continuously reduce the vibration to which workers are exposed.
The European Physical Agents (Vibration) Directive 2002/44/EC has been in force in all EU member states since July 6th 2005. This directive introduced ‘Control of Vibration at Work’ regulations, placing duties on employers to protect workers from vibration and reduce exposure levels. Exposure to vibration can cause long-term health risks The Directive was brought in to protect workers from the health problems caused by Hand Arm Vibration – exposure may result in a range of ill health effects collectively known as Hand-Arm Vibration Syndrome or HAVS. The most well known health effect is vibration white finger, but other effects include damage to sensory nerves, muscles and joints in the hands and arms.
Who is at risk?
Those who regularly operate high vibration equipment over long periods of time.
Controlling the risks
The risks can be controlled by good management such as using the correct tool for the job. This requires employers to carry out various duties including:
Vibration of handheld electric power tools is measured in accordance to EN 60745 series
EN 60745 which measures vibration in three directions (otherwise known as a tri-axial or vector sum measurement). This has been developed to replace the older version of EN 60745 standard and bring the manufacturers vibration measurement procedures in line with the HAV Directive.
In reality there are far too many variables which can affect the outcome of the measurement. The DEWALT view is that job site measurement is too UNRELIABLE. DEWALT recommends that manufacturers values are used for calculating HAV exposure levels providing they are specifically identified as ‘Tri-Axial’ or ‘Estimated Tri-Axial’ according to HSE guidelines and EN 60745-1:2006 and reflect vibration values in the so called upper quartile.
Exposure limits are calculated as a combination of the vibration level (magnitude) of the tool and the Daily Exposure Time (Trigger Time). E.g. A product with 5m/s² vibration can be used up to 2 hours/day to reach the EAV and up to 8 hours/day to reach the ELV.
Exposure Action Value (EAV) - Daily vibration exposure A(8) = 2.5m/s²
Where daily vibration exposure A(8) is below 2.5m/s² the risk is relatively low and no action need be taken
Exposure Limit Value (ELV) - Daily Vibration Exposure A(8) = 5.0m/s²
If several tools are use the exposure values must be combined:
Total exposure is then the combined value of the activities