Power HD High-Speed Digital Servo DS120M

The HD-DS120M is a great high-performance, fast actuator with plenty of torque. Digital electronics coupled with all-metal gears and two ball bearings give this servo a distinct edge over similarly sized servos, especially if you need high speed and power. The lead is terminated with a standard “JR”-style connector, which is Futaba-compatible. The pictures below show the metal gear train and an example of the hardware that might be included with this servo (hardware might vary).

Note that, as with most hobby servos, stalling or back-driving this servo can strip its gears.