“Well, there goes my servo again”. First time? Don’t worry, it happens to the best of us.
Having a faulty servo can cause a lot of problems but mainly it shoots down your ability to handle your vehicle. Frustrating as it is, you need to find a solution for this problem asap.
That’s where we come in, more accurately our post on the best rc servo brand out there on the market.
But how can you trust us completely?
Sometimes, we choose the wrong tool for our needs because we think that’s the best option available. People are very impulsive nowadays, and this is far more common than you think.
But, you can rest easy. This post wasn’t made on a whim, it’s the result of a full research team’s effort in catering to answer your needs. Our top five lists of the best rc servo are supplemented with a buying guide.
This will help you choose the best ones for yourself, according to the prioritized category of your choice.
So, what’re you sitting around for? Let’s get to it-
Dimensions (width X length X height)
ANNIMOS DS3218MG- Digital Servo
1.58 x 1.6 x 0.79 inches
SunFounder SF3218MG- Digital Servo
1.59 x 0.74 x 1.8 inches
Deegoo- FPV MG995 Gear Servo
6.61 x 3.66 x 1.3 inches
Savox SC-1251MG Metal Gear Digital Servo
1.61 x 0.8 x 1 inches
Futaba S9551 High-Speed Torque Servo
3.38 x 2.5 x 1.38 inches
First of all, let’s talk about the best brand on the market right now, especially when it comes to servos.
It’s none other than the ANNIMOS DS3218MG. ANNIMOS is a pretty well-known brand in the world of servos, so this is no surprise about it being on the top of the list.
Let’s start with the torque rating of this servo. It has a weight range of 21 kg-cm at 6.8V, to 19 kg-cm at 5.0 V, which is a high number for any brand out there.
ANNIMOS also didn’t cut any corners when it came to making its body. It’s a full metal-geared servo, with its gear made of copper and aluminum. Its highly durable CNC shelled body means that it can take a lot of hits, without batting an eye.
This servo can also spin to a maximum of 270 degrees. As a result, it may produce greater power than standard servos on the market.
It can even turn 360 degrees when the power is turned off. This makes for very flexible robotic arms.
Finally, it’s water-resistant so there’s a low chance of getting any short-circuit.
- Water-resistant and lasts long
- Higher turning angle
- Highly durable and tough
- Has a tendency of overheating
The second place goes to the SunFounder SF3218MG. Now, to be honest, we had a tough time choosing between the ANNIMOS and the SunFounder for the first spot. But in the end, the SunFounder got edged by the ANNIMOS by just a margin.
But it does have some extremely good features which beat even the ANNIMOS.
For starters, it has a higher torque rating than the ANNIMOS. It is rated to be 20.5kg-cm (284.7oz-in) -22.8kg-cm (316.63oz-in). It also has a wider range of operating voltage: 4.8V to 7.2V.
It is on the heavier side of things which may make it unsuitable for RC planes. The SunFounder also has a CNC aluminum casing.
Other than its durability, aluminum has an excellent attribute of dissipating heat. This means the SunFounder won’t overheat so easily.
It can rotate up to 270 degrees, which is a good rating for most servos. It also comes with an extra servo arm, which is a handy feature to have.
- High Torque
- Dissipates heat easily
- Comes with an extra servo arm
- Doesn’t have a long life
In third place, we have Deegoo-FPV’s 4 piece Metal gear servos. Now, this is an interesting one, which is why it took the last spot on our top 3. So, why don’t we look at the features that earned Deegoo the third spot?
The Deegoo-FPV has an operating voltage range of 3.0-7.2 Volts. Its speed rating for 4.8V and 6.0V, at zero loads, are 0.17s/60 degrees and 0.13s/60 degrees. This is a great resting for a servo for its size.
It has a decent torque rating too. It’s rated at 12 kg-cm and 13 kg-cm at the corresponding voltage ranges of 6V and 7.2V.
This servo is also the most adaptable on the list. This is compatible with the following models: biped robot, most RC cars, 50-90 methanol fixed-wing aircraft, and 26cc-50cc gasoline fixed-wing aircraft, and a lot of others too.
It has a full metal gear train and comes with a lot of accessories too! These include an extra steering wheel, fixing screws, rubber sleeves, fixing screws, and sleeves of aluminum.
- Decent durability
- Very versatile servo fits in most crawlers
- Comes with high quality, adjustable metal servo arm
- Seizes up sometimes
Next up, we have the Savox SC-1251 metal gear servo. The Savox brand has produced some stellar servos ever since its inception. The SC-1251Mg is one of the most popular servos of this brand.
So exactly what does this metal gear servo have to offer? Let’s find out-
Let’s begin with its torque rating at the voltage rates of 4.8V and 6.0V which are 7 kg-cm and 9 kg-cm which isn’t that impressive.
However, it sacrifices its torque for its speed. That’s right the Savox is the fastest servo of the bunch, at 6V. Its speed rating at that level is 0.09 seconds/60 degrees. And that holds, even its lowest voltage setting of 4.0V, where it has a speed of 0.1 seconds/60 degrees.
It has a coreless motor-driven engine and full metal gears, which are encased in an anodized aluminum body.
It also has the best value for money and is comparatively lightweight. This makes it a perfect steering servo for 1/10 scaled surface-gliders and airplanes with thin wing profiles.
- It won’t add a lot of weight to the vehicle
- Has standard durability
- Highest rotating speed
- Low torque rating
Lastly, we have Futaba’s S9551 high-speed and high-torque servo. Now, if you’re a servo enthusiast then you probably heard about the Futaba brand. They’ve made perfect steering servo and this is no different.
Let’s take a peek at those amazing features that gave it the last spot on our list-
For starters, the S955 has a coreless motor. In simpler terms, this means that this servo is a high-performing one with a long life. More importantly, it was designed for sharp changes in voltages and is very dependable.
It is also the lightest servo out of the five servos. This means this is perfectly suited for RC planes and boats. It could even be an excellent choice for race cars because a lower weight means a higher acceleration.
It also boasts an enhanced digital microprocessor. This chip allows it to cut about half of the response time from transmitter input to servo reaction.
This means that this lightweight servo is extremely fast in receiving and carrying out orders. As a result, it’ll take in better rapid handling changes which is a good attribute to have for any RC vehicle.
- Made for dynamically changing voltages
- Extremely fast at transmitting and receiving signals
- Lightweight and won’t burden any RC vehicle
- Not the highest torque compared to other servo brands
Sometimes just a brand’s name doesn’t mean top performance. For that, you need to know what serves your purpose.
This is where our buying guide comes into play. This will help you pick the perfect brand for your needs.
Voltage Rating: What Does it Mean For Your RC?
The voltage level your servo supports is another thing you have to take into consideration. Nowadays, the minimum voltage range starts from 4-4.8V and upwards from there.
The more voltage there is, the higher the power generated by the servo. However, it’s not recommended that you use a higher voltage than the one labeled on the servo. This is because you might damage the servo permanently if you operate it at a higher voltage than it can handle.
However, if you’re desperate to have more power for your servo, there’s a way you can attain it. You can use a direct power line. This draws power from the source rather than converting it first like traditional servos.
Torque & Speed Rating: Why Does It Matters?
These two are by far the most important aspects that you need to consider before buying a branded servo. These are the torque and speed ratings of a servo.
Simply put, the torque rating is the amount of weight per unit measurement of length a servo can pull off the level ground. It’s a simple measure of the motor’s turning power. The most common unit of measurements of torque is kilogram centimeters (kg-cm) and ounce inches (oz-in).
The speed rating is basically how long it takes the servo to turn 60 degrees side to side. The standard time is 0.9 seconds per 60 degrees but there are faster servos too!
If you’re into high-speed performances, for sharp turns and corners, you should opt for a higher speed rate. However, if you’re looking for a powerful servo that can provide short bursts of immense force, look for a servo with higher torque.
The Gear Train: Which Type Of Gears To Buy?
If you’re randomly choosing which motor to buy, you should think again. You need to dig deeper into the specifics of a motor to know which is the right fit.
A gear’s making is one of those “specifics” that needs to be considered.
There are mainly two types of gears. These are either made of metal or plastic. Each of these has its benefits and uses.
When you’re buying a motor, you should check what the gear is made of. These will vary according to your needs. It’ll be easier for you to understand if we use examples.
Metal gears are tough and heavy, especially when they’re compared to plastics. Of course, that’s only logical given how it’s made with tougher and more durable material. Metal gears are designed to withstand high levels of impact because of their composition.
So, RC trucks, rock-crawlers, and race cars are ideal candidates for metal gears. They are used aggressively and take quite the beating according to their requirements. These sorts of vehicles require metal gears because they face more environmental hazards than their counterparts.
However, their durability comes at a “price”, they are, as you guessed it, a bit more expensive. And they are also heavier.
But fret not, if low weight and price are your we’ve got just the thing!
Plastic gears are a good substitute if you cannot afford to have metal gear. Plastic gears are made of durable plastic and they are extremely lightweight.
This is what makes them perfect for RC airplanes and boats. They are a popular go-to option for DIY RC plane enthusiasts. This is because they are cheap and save a lot of weight.
On the off-chance, a plastic gear gets damaged or stops working, you can easily replace it with another one. This way it won’t blow a hole in your wallet if you were to get a replacement. This wouldn’t be the case if you got a gear replacement made of metal, that would be significantly expensive.
We do recommend that you buy Metal gears over Plastic ones because even though they are expensive, they last long. They’re also at times more powerful than plastic ones.
Motor Type: Coreless, DC, Or Brushless?
Servos come with mainly three main types of motors. Each of these has its attributes and advantages. These motors are as follows: DC Motors, coreless motors, and brushless motors.
DC engines are the best, from a cost perspective. They are also an ideal candidate for less demanding operations.
The specialty of Coreless Motors lies in its dependability and excessive power. It can also change voltages quickly which causes an RC servo to alter courses quickly. This makes it the perfect servo for high-speed racing and maneuvering.
Brushless motors are the heavyweights of the motor world. These servos can create high forces, faster reaction time, and they last the longest.
Nothing beats the brushless motors when it comes to the sheer amount of work they can do. These make brushless motors perfect for off-road conditions.
Question: What’s the name of the strongest servo out there in the market?
Answer: The most powerful servo in the market right now is the PowerHD 1218 TH. This motor is at its peak at a voltage of 7.4Vs. It is, however, one the premium end of things. Its gears are made of metal, but one of the toughest and strongest ones; titanium-covered aluminum. It even boasts a coreless motor, with digital control circuits and two ball bearings situated on the shaft’s output.
Question: How exactly do I select a servo for my RC car?
Answer: A probable hack to this problem is to check the servo’s weight. This is because the weight of a servo is directly proportional to the torque it can supply. This is a very important thing for you to consider as a servo should be able to handle the weight and size of your RC. A general rule of thumb for an RC car of 1/10 scale with an aptitude for a short-course track is around 10kg.
Question: What is the expected lifespan of an ideal servo under ideal conditions?
Answer: The lifespan of any servo or motor relies strongly on the level of use and the environment. For example, a motor for an RC car would last longer than for a similar motor for an RC boat. In ideal conditions, a servo can be expected to last 2 decades or even more. However, a servo subjected to operating in extreme conditions will last less than 12 months.
Well, I guess this is it, from our end. This was all we had on the best rc servo brand out there in the market today. Hopefully, we opened your eyes to the brand that would suit you the best.
However, on the off-chance, you didn’t already make up your mind on what to buy or you can’t decide, choose our top recommendation. Believe me, we’ve done our homework on this topic and you won’t regret your decision.
Till then, see you next time and good luck!