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Biomechanical evaluation of t-handles for a pronation supination task.
J Occup Med 1973 Sep; 15(9):712-717
A T-handle with an angle between the shaft and the handle in conformity with the grip angle and an optimum handle diameter improves performance of a pronation-supination task. Nine T-handles with various combinations of angles and diameters are designed and evaluated. Subjective ranking verified the above observations and the optimum angle and diameter are found to be 60 degrees and 1 inch, respectively. On objective evaluation of biomechanical profile, however, this hypothesis could not be well verified for the range of the angles and diameters investigated. A distinct criterion to optimize angles and diameters objectively could not be established, although time of reading during the two minute runs establishes some trends.
JOCMA7; NIOSH-Publication; NIOSH-Grant; Ergonomics; Biomechanics; Toolmaking; Hand-tools; Task-performance; Indices; Muscular-functions; Energy-expenditure; Electromyography; Manual-equipment; Optimum-design
Rehabilitation Medicine New York University Med Ctr 400 East 34 Street New York, N Y 10016
Issue of Publication
Journal of Occupational Medicine
New York University, New York, New York
Page last reviewed: April 12, 2019
Content source: National Institute for Occupational Safety and Health Education and Information Division