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Physical capability limits for right-angle power tool operation.

Jonathan Valencia1, Lynn Eaton2, Marty Smets3

  • 1Department of Kinesiology, University of Windsor, Windsor, Canada.

Ergonomics
|November 3, 2022
PubMed
Summary
This summary is machine-generated.

This study established physical capability limits for direct current right-angle power tool (RAPT) operations. Findings help RAPT manufacturers improve tool ergonomics and reduce musculoskeletal disorder risks in automotive assembly.

Keywords:
Industrial ergonomicsdirect currentphysical capability limitsphysical ergonomicsright-angle power tool

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Area of Science:

  • Occupational Ergonomics
  • Biomechanics
  • Human Factors Engineering

Background:

  • Automotive assembly power tool use is linked to musculoskeletal disorder risks.
  • Existing research lacks defined physical capability limits for direct current right-angle power tool (RAPT) operations.

Purpose of the Study:

  • To develop physical capability limits for RAPT operations using psychophysical methods.
  • To inform RAPT manufacturers on improving tool ergonomics and worker safety.

Main Methods:

  • A psychophysical methodology was employed with 40 female participants.
  • Participants performed fastening tasks with varying joint hardness, fastening frequencies, and RAPT strategies.
  • Physical capability limits were assessed based on participant-chosen torque magnitudes.

Main Results:

  • Participants fastened higher torque joints with TurboTight® (89 Nm) compared to Quickstep (51.8 Nm) and Stanley's ATC (48.6 Nm).
  • Differences in chosen torque were less pronounced for softer joints.
  • Increased fastening frequency led to participants selecting lower target torque magnitudes.

Conclusions:

  • Physical capability limits for RAPT operations were successfully established for diverse conditions.
  • RAPT manufacturers can utilize these findings to optimize fastening strategies and enhance tool ergonomics.
  • This research provides a foundation for reducing injury risks in automotive assembly workers.