350kg High Torque RC Servo, 2 in 1 Mode 16V~24V High Voltage Full Metal Gear Digital Servo Angle 360°

I am building a large (5 foot tall) robot for Halloween and needed a way to rotate the head (a 16" plywood cube). This easily handles the job and is far more powerful than the strongest 1/5 hobby RC servo that I could find at double the price. It also has a D-profile 8mm output shaft which is much better for high torque applications than a 25T RC servo output. I really like the manual potentiometers for precision adjustments of center point and range. Mounting this is easy as well. Lots of holes with pre-molded nut retention, etc. The plastic housing I believe is glass reinforced nylon so is very strong.

Nice product and service

I have three of these servos, and they're very, very powerful. Crazy amounts of torque, and easy to set up, overall. The physical design is nice, with good placement of bolt positions. Pretty accurate in positioning, too. I wish they had a different and more-rugged power connector, though. One caveat: They're powerful enough and fast enough to be moderately dangerous. Make sure to stand clear of them and _keep your hands away_ when they're powered up. You can limit their arc and initial position easily enough, but if you moved the controller position while they're turned off, they'll go to the new position right away, at full speed and power. I ended up including some physical stops for the lever one was driving, and used a belt drive (that can slip some) for another. For the price, you won't find another servo with more power and features, especially in this form factor.

I got two of these servos for a hackathon project - that meant i had to get these up and running correctly ASAP. I was initially unsure about which size wire to use for the power, so I called customer support and somebody picked up one ring in. He helped me with that question and others, and emailed me some other helpful resources, which is better customer support than 99% of large companies I've ever had to interact with - shoutout Eong! Super unique servo, love the look and sturdy feel and can probably be used for any project where you need a very high power, compact, and easy-to-use servo (I'll definitely be recycling mine to use for future projects).

I purchased one of these DOCYKE servos to use in industrial automation. I hooked this up to a test unit that outputs a PWM signal and the unit works really well, and very accurate. Soon I will test for durability using about 50% of its continuous capacity. I consider this to be a really great solution because it is compact, easy to operate, and it is very affordable.