Effects of handle shape and texture on the hand-powered tools performance – A review

Abstract

The performance of hand-powered tools, axil force, total/individual finger force, and subjective discomfort was examined in this study about the handle shape, including its lateral and longitudinal cross-sections, material surface (plastic and rubber), and workpiece orientation (horizontal and vertical). The functioning of hand-powered tools, the force transferred by the tool, and the involvements made by each finger to the overall distribution of grip force, on the other hand, are all impacted by design factors. In the case of a screwdriver, our current study found that cylindrical and reversed double frustum lateral handles, compared to triangular longitudinal cross-sectional handles, double frustum, and cone handles, were less uncomfortable. The newly created ergonomic hand tools for weaving were determined to be usable and acceptable by carpet weavers. In the case of Flat Files, our study finds that the files with handles bent between 50 and 70 degrees demonstrate their superiority.