TowerPro SG90 Servo


Modulation: Analog
Torque: 4.8V: 25.00 oz-in (1.80 kg-cm)
Speed: 4.8V: 0.12 sec/60°
Weight: 0.32 oz (9.0 g)
Dimensions: Length:0.91 in (23.0 mm)
Width:0.48 in (12.2 mm)
Height:1.14 in (29.0 mm)
Motor Type: 3-pole
Gear Type: Plastic
Rotation/Support: Bushing
Rotational Range: (add)
Pulse Cycle: (add)
Pulse Width: 500-2400 µs
Connector Type: JR
TowerPro SG90
Brand: TowerPro
Product Number: (add)
Typical Price: 2.10 USD
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Reviews of TowerPro SG90 (20)

  • Rating:

    Application(s): Arduino fun with kids

    Comments: myservo.attach(9,200,577); //the pin for the servo control (when 200,577 = full range from 380 till 2580)

  • Rating:

    Application(s): servo testing for arduino-Rpi hybrid

    Comments: min PulseWidth is 200 and max 577

  • Rating:

    Application(s): Remote Loudness control for a classic jukebox.

    Comments: Good performance …..with one problem; Servo advances about 7 degrees from previous position upon power up. Big problem when controlling the volume on a Jukebox.

  • Rating:

    Application(s): Electric planes to 1 km.

    Comments: Great little servo. Take a long time to wear out Only problem I have encountered is the servo arms rarely fit other servos.

  • Rating:

    Application(s): Quadcopter

    Comments: It's working fine.

  • Rating:

    Application(s): Arduino starter kit

    Comments: Works OK throughout 180 degrees, but has chatter at almost every position but 0 degrees. Maybe a bad one?

  • Rating:

    Application(s): Animatronics

    Comments: I have to agree with "frustrated", it seems that all datasheets include every bit of information EXCEPT spline size and tooth number. Ridiculous!

  • Rating:

    Application(s): Where in the world can one find the spline count for the sg-90?

    Comments: No website anywhere tells you the needed specification.

  • Rating:

    Application(s): Autonomous Sentry Gun - pan, tilt and trigger

    Comments: Mounted the y-axis on top of the x-axis, and so far no trouble. Lighting fast, lightweight and small size make it easy to put everything into a briefcase, making for the perfect area denial technology for airsoft, paintball and even my front entrance, after investing a bit into some thermal vision webcam.

  • Rating:

    Application(s): pulse servo

    Comments: The description stated: 500-2400 microseconds, but I work for the extreme positions 1000-3400 microseconds.

  • Rating:

    Application(s): Light Robotics - general limb movements

    Comments: They seem quite stable but as mentioned by another robotics user they won't do 180 degrees. Mine went from about 4 degrees (Using setting 581) to 176 degrees (Using 2380). They will hit most angles in between fairly accurately though.

    I worked out that the centre (90 degrees) was 1480 and calculated 45 and 135 and it went right to them. Pity about upper and lower (0 and 180) not being available though.

    Overall not too bad for the price. I paid £4.75 for a pack of 4 from eBay.

  • Rating:

    Application(s): Magnet rotation for robotic project

    Comments: I couldn't make it rotate 180 degrees. Mine only worked 90 degrees. From 0 to 90 clockwise. It didn't go counterclockwise at all. Servo didn't listen signals over 1300 mS. it forked only in range 500-1300. These are the cheapest servos you can get (2-3$). And when you need a lot that would be the way to go. I'm trying to figure how stable these servos are and how prone they are to malfunction.

  • Rating:

    Application(s): park flyers and small appliances

    Comments: This tiny servo presents good performance - speed is OK and as a vintage servos user I think the torque is impressive - for an incredible price (less than 2 euros sending cost included!)
    I don't have a lot of sight on how their life is long, but I haven't any complaints for now on...

  • Rating:

    Application(s): Track switching and gate control with plastic low weight materials.

    Comments: I used this servo for the application of railway track switching and gate control in my latest project which found to be very worthy for its low price and size.

  • Rating:

    Application(s): robot

    Comments: i have used this servo for pick and place mechanism. after couple of runs it is just dead and it does not respond

  • Rating:

    Application(s): Put two SG90 servos on the ailerons of a Carl Goldberg Tiger 2 (62 inch span and OS35AX) in 2009 and they are still flying today.

    Comments: Was going to replace them but the shafts are still in good shape with no play. These are surprisingly long lasting servos as the plane has flown weekly for almost 5 years with aggressive aerobatics.

  • Rating:

    Application(s): Passive mechatronic display, new project.

    Comments: I am developing a project were it will need some kind of lever action. So I am testing with SG90.
    Before putting them on work, I tested two of them for about 130.000 cycles, without load, at one cyle per second, and 70 degrees travel.
    Just to see the control pot wear.
    At final, one had no problem, and the other after 110.000 cycles, stops at one end of travel.
    Anyway they seems to be very thrustable to normal use.

  • Rating:

    Application(s): RC, robotics, Arduino, Raspberry Pi

    Comments: I found these servos to work really well for the price. Yes there are other high-end servos that may be a little better but you can't beat the price of these servos and they are only 9 grams in weight. I got mine from with free 2-day shipping. They work great with Arduino and the Servo library with Arduino is easy to use with them.

  • Rating:

    Application(s): Park flyers

    Comments: Good little servo and cheap enough to throw away when they break (on lightweight applications, they don't break often). I don't trust these on expensive planes where I need accuracy, but you can't beat them for the price on foamies.

  • Rating:

    Application(s): Mini Stick, 57" P-51 Foamie FMS warbird, 36" depron Slo-Buddy.

    Comments: Used in mini ultra stick and 57" p-51 foamie and after 5 flights so far no problems. I also have them in a slo-buddy over a month and 30 flights, again no problems. I get them at for $2.59 and out of the last 8 one was bad from the factory but they replaced it for free. I think for the price they are great.

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