Reaction torques and operator stress while using powered nutrunners

Andris Freivalds; Jörgen Eklund

doi:10.1016/0003-6870(93)90003-R

Reaction torques and operator stress while using powered nutrunners

Andris Freivalds, Jörgen Eklund

Marcus Department of Industrial and Manufacturing Engineering

Research output: Contribution to journal › Article › peer-review

33 Scopus citations

Abstract

Reaction torque measures of six different nutrunners were correlated with EMG measures and subjective ratings of perceived exertion for different work surface orientations, joint stiffnesses, rpm levels, air pressure levels and handle configurations. Using an underpowered tool or using a softer joint resulted in larger impulses and worse ratings. A pulse-type shut-off mechanism produced the lowest reaction torque and the best rating. Overall, ratings correlated directly with the impulse level. The subjects were good judges of stress levels, and subjective ratings were valid measures of operators stress.

Original language	English (US)
Pages (from-to)	158-164
Number of pages	7
Journal	Applied Ergonomics
Volume	24
Issue number	3
DOIs	https://doi.org/10.1016/0003-6870(93)90003-R
State	Published - Jan 1 1993

All Science Journal Classification (ASJC) codes

Human Factors and Ergonomics
Physical Therapy, Sports Therapy and Rehabilitation

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abstract = "Reaction torque measures of six different nutrunners were correlated with EMG measures and subjective ratings of perceived exertion for different work surface orientations, joint stiffnesses, rpm levels, air pressure levels and handle configurations. Using an underpowered tool or using a softer joint resulted in larger impulses and worse ratings. A pulse-type shut-off mechanism produced the lowest reaction torque and the best rating. Overall, ratings correlated directly with the impulse level. The subjects were good judges of stress levels, and subjective ratings were valid measures of operators stress.",

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