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Pubmed for Handhelds

PUBMED FOR HANDHELDS

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  • Title: Vibration from riveting tools in the frequency range 6 Hz-10 MHz and Raynaud's phenomenon.
    Author: Dandanell R, Engström K.
    Journal: Scand J Work Environ Health; 1986 Aug; 12(4 Spec No):338-42. PubMed ID: 3775319.
    Abstract:
    The vibration characteristics of hand-held riveting hammers and bucking bars used in the aircraft industry were measured and recorded for frequencies from 6 Hz to 10 MHz. Three different measuring systems had to be used. Up to about 1 kHz a displacement transducer was used, up to about 50 kHz a piezoelectric accelerometer was used, and in the megahertz region an ultrasonic probe was used. The signals were analyzed according to the guidelines of the International Organization for Standardization (ISO/DIS 5349), and also according to methods common in environmental engineering. The weighted acceleration according to ISO/DIS 5349 was between 10 and 11 m/s2 for typical riveting tools. Very high acceleration values were obtained for frequencies above those specified in ISO/DIS 5349. In a group of 288 riveters, about 50% showed symptoms indicating Raynaud's phenomenon after about 10 years of work, although the daily exposure of riveting tools was about 1 min/d. The investigation showed that special precautions must be taken to measure the acceleration of percussion tools and that the risk criteria in ISO/DIS 5349 do not cover all the risks connected with percussion tools.
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