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An evaluation of the standardized chipping hammer test specified in ISO 8662-2.

Authors
Dong-RG; McDowell-TW; Welcome-DE; Warren-C; Schopper-AW
Source
Ann Occup Hyg 2004 Jan; 48(1):39-49
NIOSHTIC No.
20024341
Abstract
Prolonged exposure to severe chipping hammer vibration may cause hand-arm vibration syndrome. A reliable test method is required to select appropriate tools and assist in the development of better chipping hammers. In the present study, the ISO standardized test method (ISO 8662-2, 1992) was examined through an investigation of the vibration characteristics of chipping hammers operating on the energy absorber specified in the standard. The energy absorber and test setup were designed and constructed based on those specified in the standard. The experiment employed six subjects and used two pneumatic chipping hammers and three different feed forces (50, 100 and 200 N). The subject posture was the same as that specified in the standard. The vibration emission at the tool dominant frequency (or air blow rate) generally declined with an increase in feed force, thus decreasing the frequency-weighted accelerations. The increase in feed force, however, resulted in an increase in the unweighted vibration emission at high frequencies. The chipping hammer vibration emission operating on the energy absorber at the high feed force (200 N) was inconsistent. The measurement method has a good repeatability except at a high feed force. The feed force has a significant effect on the vibration emission. The single feed force specified in the standard may not be sufficient to test the tool behaviors. Multiple levels of feed force should be used for the chipping hammer test. Doing so may provide a more appropriate basis for tool screening.
Keywords
Vibration-exposure; Vibration-effects; Hand-protection; Hand-tools; Arm-injuries; Testing-equipment; Tools; Power-tools
Contact
Engineering & Control Technology Branch, National Institute for Occupational Safety and Health, 1095 Willowdale Road, Morgantown, WV 26505, USA
CODEN
AOHYA3
Publication Date
20040101
Document Type
Journal Article
Email Address
rkd6@cdc.gov
Fiscal Year
2004
NTIS Accession No.
NTIS Price
Issue of Publication
1
ISSN
0003-4878
NIOSH Division
HELD
Priority Area
Disease and Injury: Musculoskeletal Disorders of the Upper Extremities
Source Name
Annals of Occupational Hygiene
State
WV
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