Optimum tool handle diameter for a cylinder grip.
The ideal diameter for a tool handle for males and females has been determined using an existing biomechanical model of the hand validated in previous works. The model estimates a 33-mm optimum diameter tool handle for the general population (males and females). When the optimum diameter for a tool handle is selected, the muscles exert the minimum force needed to hold the tool and perform gripping activities. Optimal handle design reduces the force required for gripping a tool, protects the underlying joint structures, and reduces the risk of developing cumulative trauma associated with repetitive task requiring high grip forces and awkward postures. This article provides a design parameter for optimal tool diameter to aid the therapist in the selection of assistive devices, built-up handles, or for the fabrication of a tool handle.
Sancho-Bru
Joaqun L
JL
Departament de Tecnologia, Universitat Jaume I Campus de Riu Sec 12071, Castelló, Spain.
Giurintano
D J
DJ
Pérez-González
A
A
Vergara
M
M
D001696:Biomechanical Phenomena; D006804:Ergonomics; D005260:Female; D005385:Fingers / Q000502:physiology*; D018737:Hand Strength / Q000502:physiology*; D006801:Humans; D008297:Male; D008954:Models, Biological; D008962:Models, Theoretical; D018482:Muscle, Skeletal / Q000502:physiology; D011187:Posture / Q000502:physiology; D012727:Sex Characteristics