Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Reaction torques and operator stress while using powered nutrunners.

A Freivalds1, J Eklund

  • 1Department of Industrial & Management Systems Engineering, Pennsylvania State University, University Park, PA 16802, USA.

Applied Ergonomics
|June 1, 1993
PubMed
Summary
This summary is machine-generated.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Copepods drive large-scale trait-mediated effects in marine plankton.

Science advances·2019
Same author

Maintaining knife sharpness in industrial meat cutting: A matter of knife or meat cutter ability.

Applied ergonomics·2016
Same author

Perspectives on recycling centres and future developments.

Applied ergonomics·2016
Same author

Increased work pace is unprofitable: a beef-cutting case study.

Meat science·2015
Same author

Female Baltic herring Clupea harengus allocate resources from growth to reproduction in poor feeding conditions.

Journal of fish biology·2015
Same author

Vision, light and aging: a literature overview on older-age workers.

Work (Reading, Mass.)·2014
Same journal

Authority gradients in rail: A cross-jurisdictional systematic review and meta-synthesis.

Applied ergonomics·2026
Same journal

The distracting role of stress: Impaired executive attention and delayed fatigue perception.

Applied ergonomics·2026
Same journal

Analysis of work system components in interprofessional communication to determine shock etiology.

Applied ergonomics·2026
Same journal

Getting SSPOT to run: Development of a novel direct observational tool for usage in clinical settings.

Applied ergonomics·2026
Same journal

Investigating the impact of sopite syndrome on physiological responses during an immersive Augmented Reality (AR) game in a moving vehicle.

Applied ergonomics·2026
Same journal

The effect of aircraft cockpit rudder pedal shape on lower limb muscle activation, plantar pressure, and comfort.

Applied ergonomics·2026
See all related articles

Using underpowered nutrunners or softer joints increases operator stress. Pulse-type shut-off mechanisms reduce reaction torque and improve perceived exertion ratings, indicating valid operator stress assessment.

Area of Science:

  • Occupational Ergonomics
  • Biomechanics
  • Human Factors Engineering

Background:

  • Nutrunners are common tools in assembly lines.
  • High reaction torque can lead to operator discomfort and injury.
  • Understanding factors influencing reaction torque is crucial for workplace safety.

Purpose of the Study:

  • To correlate reaction torque with electromyography (EMG) and subjective exertion ratings.
  • To evaluate the impact of various operational parameters on nutrunner performance and operator stress.
  • To determine the validity of subjective ratings as measures of operator stress.

Main Methods:

  • Six different nutrunners were tested under varying conditions: work surface orientation, joint stiffness, rotational speed (rpm), air pressure, and handle configuration.

Related Experiment Videos

  • Reaction torque, EMG activity, and subjective ratings of perceived exertion were measured.
  • Statistical correlations were analyzed between these measures.

    • Main Results:

    • Underpowered tools and softer joints led to increased impulse forces and lower subjective ratings.
    • A pulse-type shut-off mechanism resulted in the lowest reaction torque and highest ratings.
    • Subjective ratings showed a direct correlation with impulse levels, confirming their validity.

    Conclusions:

    • Tool power and joint stiffness significantly influence operator stress.
    • Pulse-type shut-off mechanisms are effective in minimizing reaction torque and improving operator comfort.
    • Subjective ratings are reliable indicators of operator stress levels in nutrunner operations.