Powder metallurgy is core technology in geared motor. Geared motor is a kind of power transmission device. It changes the torque by reducing the revolution speed using the different ratio of gears, with less noise and more efficiency. Therefore the quality and precision of the gear is critical. Sinter products ensure precise output of the revolution speed according to deceleration ratio, in addition to the excellent durability and reliability. Various deceleration ratios are possible upon the required speed, when using powder metallurgy technology.