HS-645MG
The 570-18 part of the Hitec HS-645MG is the motor used in the servo. It is a standard size servo motor with metal gears and a powerful coreless motor. It operates at a voltage of 4.8 - 6.0 and can provide up to 145 oz.-in. of torque. It has a dual ball bearing output shaft for maximum efficiency, and provides good performance for almost any application.