Hiwonder 20KG High Torque Serial Bus Servo Three Channels Metal Gear 240°Rotation Support Temperature, Voltage and Position Feedback

These are among the least expensive in their class, but the quality of their build is amazingly good!I overloaded one of them until it heated up quite a bit, but it was absolutely fine after it cooled down.Now I make sure to program current limiting so they won't overload, lesson learned.Serial Bus servos like these are serious time savers, so now I'm spoiled because these will report their position, torque, temperature, etc. which means I don't have to build robot joints with all the separate parts I would need to accomplish all of this using steppers, encoders, current sensors, etc.After I bought the first five, I bought 18 more, and I am very happy I did!

This servo has MORE than enough torque for my Arduino projects but I just have to learn how to use bus servo communication protocol for Arduino. However, I did test it with some RC stuff and this is really what you need if you need to manipulate objects with some weight! Very satisfied!

This servo uses a serial UART signal instead of PWM like many common servos, so it will need an adapter board or homebrew circuit to control it with an Arduino or the computer. The servo is well built and should be durable.