Abstract
Many factors have effect on load carrying characteristics of the injection molded plastic spur gear pair. One of them is the plastic materials. In especial, the temperature in plastic materials is the most important item, because high temperature in plastic materials causes decrease in the modulus of longitudinal elasticity. Therefore, the effect of each condition, such as the transmitting torque and the kind of plastic materials, on the bulk temperature of gear was investigated. In addition, the measurements of strength and noise of gear were done. The test gears were made from standard POM and POM included new porous carbon materials. As a result, the effects of plastic materials were found.
