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Related Experiment Videos

Optimum tool handle diameter for a cylinder grip.

Joaqun L Sancho-Bru1, D J Giurintano, A Pérez-González

  • 1Departament de Tecnologia, Universitat Jaume I Campus de Riu Sec 12071, Castelló, Spain.

Journal of Hand Therapy : Official Journal of the American Society of Hand Therapists
|November 8, 2003
PubMed
Summary

Researchers determined the optimal tool handle diameter is 33 mm for both males and females. This finding minimizes muscle exertion, reducing injury risk and improving grip for everyday tasks.

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Area of Science:

  • Biomechanics
  • Ergonomics
  • Occupational Health

Background:

  • Repetitive tasks with high grip forces and awkward postures increase the risk of cumulative trauma disorders.
  • Existing tool designs may not be optimized for universal hand anthropometry, potentially leading to discomfort and injury.

Purpose of the Study:

  • To determine the ideal tool handle diameter for the general population, encompassing both males and females.
  • To provide a specific design parameter that minimizes muscle exertion during gripping activities.

Main Methods:

  • Utilized a previously validated biomechanical model of the hand.
  • Applied the model to estimate the optimal handle diameter for minimizing grip force requirements.

Main Results:

Related Experiment Videos

  • The estimated optimal tool handle diameter for the general population (males and females) is 33 mm.
  • This diameter allows muscles to exert minimum force for holding and gripping tasks.

Conclusions:

  • An optimal tool handle diameter of 33 mm can reduce grip force, protect joint structures, and lower the risk of cumulative trauma.
  • This parameter can assist therapists in selecting or fabricating appropriate assistive devices and built-up handles.