Among the components of Electric Power Steering(EPS) in the field of steering, reducer for improving the jaws batting power of the driver is formed by Worm and Worm wheel gear. Motor specifications of the motor for operating the reducer using the ferrite demand relating to the instability as a limited resource and high price of rare earth metal in development, to date, compared to motors existing, it is a state in which the output is reduced . To compensate for motor output away conventional ratio, increase of reduction ratio of the reduction gear is required, the gear value of Worm Wheel is thinner packaging a limited space, as compared to material that was used in the existing there is a need to develop a material with excellent durability. In this study, by using the composite materials the viscosity of the composite material fiber30% Glass is reinforced Polyamide12 different molecular weight has been reinforced Glass fiber30% to Polyamide612 other, tensile strength, elongation, primary the impact strength test confirmed the durability of the material are changed by proceeding secondarily to proceed, the measuring gear tooth surface, the guerrilla variation in the durability test by fabricating Worm Wheel separately