ABSTRACT

Hand grip torque strength is important over a broad range of manual tasks which involve the tightening and loosening of fasteners using powered or unpowered hand tools. This strength is also a necessary capability in assembly tasks which include the tightening and loosening of threaded parts or connectors by unaided hand torque. A number of studies have been conducted to model, measure, and predict hand grip torque strength under specified conditions. These studies have revealed ways in which task and hardware design variables interact with biomechanical action and effective torque strength.