Hand-arm vibration: hazard analysis of reciprocation saws \Focus on IFA s work, No. 0295\ IFA

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Specifications	Hand-arm vibration: hazard analysis of reciprocation saws \Focus on IFA s work, No. 0295\ IFA
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0295 Edition 1/2010 617.0-IFA:638.222 Hand-arm vibration: hazard analysis of reciprocating saws Problem Reciprocating saws (s

Specifications	Hand-arm vibration: hazard analysis of reciprocation saws \Focus on IFA s work, No. 0295\ IFA
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Content	0295 Edition 1/2010 617.0-IFA:638.222 Hand-arm vibration: hazard analysis of reciprocating saws Problem Reciprocating saws (sabre saws) have a wide range of uses. Electric saws are increasingly used for the cutting of wood and metal. Pneumatic saws are primarily used in metalworking, and are also termed pneumatic panel saws. The reciprocating movement of the saw blade (translational move- ment) results in vibration being transferred to the user. The vibration is determined essentially by the stroke, the saw blade, and the material being cut. An unfavourable combination of these factors may cause the user to be exposed to exceptionally high vibration. In response to frequent complaints, vibration measurements were performed under plant conditions for the purpose of hazard analysis and the development of preventive measures. Activities Vibration was measured on pneumatic and electric power tools under typical working and operating conditions. The exposure parameter was meas- ured in the form of the total vibration value ahv, which is composed of the frequency-weighted accelerations in the three axes of measurement. Results and Application The vibration exposure generated by the electric tools studied is during the cutting of wood in the order of ahv = 1.9 to 10.2 m/s² and ahv = 12.8 to 15.2 m/s² during the cutting of metal. Use of a reciprocating saw in metalworking Pneumatic tools yielded higher exposures in plant use, in the region of ahv = 23 to 36.4 m/s². In some cases, the manufacturer s data differ con- siderably from the value measured in practice, thereby presenting a risk of the hazard being underestimated.
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