RoboStar SBRS-5314HTG 280° Digital Metal Gear High Voltage Robot Servo 25T 53.1kg / 0.14Sec / 81g

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Is a fraud!!!!

Nov 14, 2021

No brushless motor, very poorly processed.

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Fake

Dec 02, 2020

it's fake advertising.
servo is not in accordance with the declaration.
for the second time I was sold a fake servo. due to business obligations I am forced to buy. (critical component fortunately corresponds)
support does not respond. only automatic messages come

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Terrible for High Stress Situations

Jun 03, 2019

I had this servo to be the actuator for the arm on my mantis class battle bot. all this thing needed to do was basically self right my robot. We purchased two of these for the event we attended and both failed in light testing. The shafts holding the internal gears together will pop out of their bearing holes and allow the gears to skip. They would fail under the stress of their own torque just clamping down on stationary objects. The servos will not allow themselves to be gently back driven so that is also annoying and attempting to do so will also damage them.
Garbage product, cannot recommend.

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Great but has flaws

May 07, 2019

Bought a few of these for a hexapod project.
The 2mm mounting holes on the servo top / bottom and servo horns make it tough to get a solid connection. The plastic base holes are not threaded and come in 1.5mm size (I cracked a few tapping these with 2mm bit). The servos are also quite noisy under load.
They are very strong for their price point though, better than anything else I could find in their bracket elsewhere. The idler hole in the bottom is a great touch for making a solid joint. Looking forward to putting them through their paces.

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Customer Rated

Apr 05, 2017

Easily the best servos I've found for the money. Mechanically they seem comparable to dynamixel servos, but are a fraction of the cost. There is room in the case to add custom electronics for torque control, if more advanced control is required.

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Out of stock

Dec 01, 2016

Are you going to restock this soon?

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Customer Rated

May 13, 2016

I've bought lots of these servos, and they are the best I've ever found. Especially great is the idler wheel on the opposite side of the motor from the output shaft, which allows you to make a really solid robot joint. They move very smoothly and fast, and sit quietly at whatever position you send them to (unlike a lot of RC servos!). Some suggestions to the manufacturer: Make the servo case out of all-aluminum. The plastic which holds the rear bearing on the output shaft cracks under very high torque. I've cracked several of them running at 8.4 Volts, and then the shaft can move out of position and the gears skip. Incidentally, the gears are very good and survived all the skipping without damage. Plus, I would like this motor to be made available in a larger size/torque and a smaller size/torque, so they can be distributed in diminishing size along a robot arm.

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Customer Rated

Dec 20, 2015

These are amazing servos for the money. I purchased mine for a robotics project because I needed something with high torque, high speed, and a sturdy metal drivetrain. It also had to fit inside Actobotics channel, which it does perfectly. I also like that it uses a brushless motor.

The build quality is Chinese standard, meaning they do things like hot glue the header plugs into place. This, however, works to the advantage of anyone that wishes to move the location of the plug exit. If you go to the Thingiverse website and search for RoboStar, you'll find a new bottom plate that lets you do just that.

If I had to complain about this servo, I'd wish for larger mounting holes. For those curious about hardware sizes, the mounting holes for the servo itself take puny little M2 screws, as do the servo horn holes. The servo horn itself attaches to the servo with an M3 screw. The splines for the horn are Futaba 3F standard, and Actobotics hub horns will fit nicely.

So far I love these. Let's hope they hold up.