Electric power steering system gear

The utility model provides an electric steering system gear in the technical field of automobile parts, which comprises a plastic part and a metal insert, the metal insert and the plastic part are arranged in an embedded manner, outer circle gear teeth are fixedly arranged on the metal insert, and a step is fixedly arranged on the plastic part. By adopting the design structure that the polyether-ether-ketone plastic part is combined with the 20 carbon steel metal insert or the 40 Cr metal insert, the gear can bear very high torque, and the torque requirements of electric power steering gears of commercial vehicles, heavy duty vehicles and the like are met; the fatigue resistance is high, and the service life of the whole automobile is prolonged; the pitting corrosion and abrasion resisting effects of the gear are improved; noise generated in the operation process of the gear is reduced; and the fuel oil use efficiency of an automobile engine is improved. 本实用新型提供了汽车零部件技术领域一种电动转向系统齿轮，包括塑料件与金属嵌件，金属嵌件与塑料件嵌合设置，金属嵌