4Pcs MG996R Servo Metal Gear Torque Digital Servo Motor for Smart Car Robot Boat RC Helicopter

I bought 5 sets of these for a total of 30 servos. I tested each one, and 3 had problems. One moved but was slow and had no power. Under a light resistance test using my finger. It just stopped moving until I moved my finger out of the way. The other ones that worked correctly would easily move my finger. The second servo would stop responding when encountering the resistance of my finger. It wouldn't respond to any signal from the tester until I gave it a push with my finger. Then it would spin like it should until encountering any more resistance. It continued to fail every finger test in the same way. The third faulty servo would pass the finger resistance test, but failed the range of motion test. When spun counter clockwise it would size up and stop responding to signals from my tester until I nudged it with my finger. It failed the range of motion test in the same way every time. I did not test for torque accuracy, but some servos seemed stronger than others.The project I'm working on is an 8 legged walking Arduino robot with a grasping arm on top. It is a proof of concept bot for a later bot which will be much larger and hopefully be able to fetch things from around the house or fridge. I'm disappointed in my purchase.Edit: Seller contacted me and replaced the defective items. I am very happy with my purchace now. I will definitly check here first when ordering more servos. Customer service is world class good.

Came quick and work. They are definitely cheap as I have to replace them often on my rc car because they break.

I purchased these to automate my ham shack a bit. Blinds, A/C registers, stuff like that. I’m disabled and these will help out a lot. They have plenty of torque. My daughter tried to stop a servo. She didn’t have a chance. She’s no lightweight either. She snapped a real Craftsman socket when she was 15. They’re easily converted to 360° rotation. With metal gears, several arms, spacers and screws for the price, I’m impressed!

All six of mine work. I didnt hook them up to some fancy machine that tells me the throw, but the people complaining about a couple degrees are absurd. If you need that kind of accuracy dont be cheap and expect them all to rotate within a 1/2 of a degree. These are great, all things considered. The people who have failures... I'm willing to bet they plugged them in wrong as these do not have the small tab on the plug stopping you from doing so. Pay attention to what you are doing instead of rushing and making mistakes so you can write a bad review...

Working great in my tamiya monster beetle, my traxxas skully and my traxxas stampede. The servo savers are garbage but the servo itself... awesome.

UPDATE: After ~5 hours of total use, 3 of the 4 units have failed. The servo pots are not functioning and at the end point of travel, the servo keeps "searching" meaning it continues to move back and forth when the transmitter is held at the end of range. I will be removing these servos from all my cars and trucks.For the price I was not expecting high quality units. They function and rotate as advertised, but the biggest issue is that fit does not center consistently. This becomes a major issue when racing at speed. Imagine coming off a turn heading into the straight and slamming into the wall instead at high speed. It's not a pretty sight.For low speed rock crawling, it works great due to the high torque.Overall it works as a servo should, but not consistently.

There was a problem with one that I got out of the box that just did not work at all. In fact, it was drawing WAY too much current to where it shorted my Arduino. Thankfully the circuit was protected and the microcontroller shut itself off. I am not happy with this product. The problems, however, did not stop here.When I first started using the motors for the first 10 minutes they worked well. However, I started to notice that one of the motors started skipping teeth. Now, instead of what I assumed 45dg rotation it started over-rotate that. I decided to test to see if this was happening to all of them. I then connected the motor to my Arduino and rotated the server back and forth for 20 minutes after 10 minutes each one started skipping teeth. Now after 15 minutes 3 of the motors are rotation 270dg NOT acceptable. So now I have 4 motors that are not working...

These servos seem like a really good value so far. The metal gears are really smooth and the servos have been reliable for a dozen flights on my plane so far. I don't have any complaints right now. Give them a try.