Abstract. Steel ball riveting mainly functions to attach sockets for hand tools. The connectivity between sockets and accessories is directly linked to how tight the steel balls are riveted: if too tight, then it will be difficult to change the accessories or they will even jam; otherwise, they will loosen themselves off. Improving the quality of steel balls lies in controlling related parameters in the process. The paper proposes a model to optimize the riveting of steel balls based on better refining a hand tool manufacturer's riveting process. The study probes the optimized combination of parameters for riveting on the experimental level by combining the design methods of TRIZ and Taguchi's Quality Engineering. By increasing Cpk from 0.45 to 1.46, the results reveal that the process capability index registers a dramatic rise to the required precision, thus improving the quality of steel ball riveting and the stability of its process capability.