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SPECIMEN OF AN APPROACH WHICH MIGHT BE ADOPTED BY SUPPLIERS

TO THE PROVISION OF INFORMATION TO HELP PROTECT AGAINST

RESIDUAL RISKS FROM HAND-ARM VIBRATION

Chipping hammer make ABC, type 990, model 12-UH, 0,6 MPa when operated in

accordance with these instructions and tested in accordance with EN 28662-2:1994

results in the following vibration emission declared in accordance with

Measured vibration emission value

a-

8.0 m/s2

Uncertainty

K-

2.3 m/s2

These values are suitable for comparison with the emission levels of other tools that

have been subjected to the same test.

Note: This data represents the vibration in the z-axis on the main handle. The

z-axis is not always the highest axis on the main handle when the tool is in normal

use and much higher vibration levels occur at the hand position on the main body of

the tool.

The vibration emission from chipping hammers varies greatly with task and operator

grip and feed force. We believe that normal intended use of the tool will usually

produce vibration emissions at the hand position on the body of the tool that vary

between 12 and 16 m/s2 depending on the details of the task but emissions outside

this range may occur for some applications. A figure of 14m/s2 is probably a useful

average emission value, say, for estimating the likely average exposures (and hence

risk in accordance with EN 5349-1) of tool users performing a wide range of tasks

within the intended use of the tool.

We point out that application of the tool to a sole specialist task may produce a

different average emission and in such cases we recommend a specific evaluation

of the vibration emission but we would expect the average to fall between 12 and

16m/s2.

The tool should not be used by an individual regularly for more than 20 minutes

(hands-on power-on) in any one day, and never more than 40 minutes. This

duration of use should be reduced if the individual is exposed to hand-arm vibration

from other sources. The vibration emission is closely linked to the operating

pressure in the air supply. You should ensure that the pressure is set in accordance