Hand-Arm Vibration Testing - Vibration
Severity Index of Hammer Impact
Hand-arm
vibration is of increasing concern to all workers. This area has had a
lot of research for power tools with well established standards in
place. Impact tools have had less research, but this area is also
of concern to users
of hammers and their employers. Determining the damage from vibration
from impact tools is an important challenge.
Spectrum Technologies has developed a technique for
measuring the severity of hammer impact vibration. The technique
measures the vibration on the hammer handle for a given impact
force. This measurement is then transformed into a vibration
severity index (VSI) using principles consistent with ISO5349. In
addition, the technique measures the first bending frequency of the
hammer handle.
The
VSI enables the comparison of the
vibration severity of different hammers. During hammer
design the VSI of different design iterations is measured to reduce the vibration felt by the user.
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