A study of factors defining the ‘operator-hand tool system’ at the work place

Abstract

Hand tools are responsible for approximately 10% of all industrial injuries. Despite guidelines for designing better hand tools and increased automation. common unpowered hand tools are, still being used in assembly line and maintenance operations in most developing and industrialized countries. The decline in industrial productivity due to improper selection and usage of a hand tool has largely been ignored till now. This trend, however, cannot continue for long if the goal of industrial and production engineers is to strive constantly for higher productivity.

This paper reports the results of two studies conducted to understand several of those factors which influence torque exertion capabilities of workers. Using sample sizes ranging from 10 to 40, peak torque capability profiles, developed on mates, are presented as a function of factors relevant in defining the ‘operator-hand tool system’.