Abstract
Engineering plastic which has heat-resistance, shock-resistance and chemical-resistance has been applied in various fields, such as automobile, machine parts, electronic components and chemical components. As one of examples, the Electric Power Steering (EPS) has been equipped for a steering assistance in an automobile. And worm wheel of EPS is made of engineering plastic. However, the reports and papers about the load carrying capacity of the engineering plastic worm wheel are hardly seen. In this study, some running tests were executed with the worm wheels made of 4 types of engineering plastics. The precepts for designing engineering plastic worm wheel were obtained and discussed in this paper.
