Compact 9g micro servo with approximately 180 degrees of travel
In stock
Servos
TowerPro SG90 9g Micro Servo Motor
Popular 9g micro servo, 180-degree rotation, ~1.2 kg-cm torque, 4.8-6V, for RC and robotics.
₹80 + 18% GST
SKU: BOTBIT-MOT-01 · Best for: Pan-tilt camera and sensor mounts
Overview
About TowerPro SG90 9g Micro Servo Motor.
The TowerPro SG90 is the classic 9-gram micro servo that has become the default actuator for beginner robotics and RC projects. It provides around 180 degrees of rotation and delivers roughly 1.2-1.8 kg-cm of torque at 4.8-6V, all in a tiny plastic-geared package that weighs about 9 grams. It is controlled with a standard 50 Hz PWM signal, the same pulse-width scheme used across the hobby servo world.
It is enormously popular in India because it is extremely cheap, works directly from an Arduino or ESP32 with the built-in Servo library, and is small and light enough for pan-tilt camera mounts, robotic grippers and moving parts on 3D-printed builds. For its price it delivers dependable positioning for light loads.
The SG90 comes with a set of servo horns and mounting screws, ready to bolt into brackets or 3D-printed parts. Its plastic gears keep it light and inexpensive, which is ideal for learning and low-stress mechanisms.
Key features
Why it stands out.
Torque of roughly 1.2-1.8 kg-cm at 4.8-6V
Standard 50 Hz PWM control, works with Arduino Servo library out of the box
Lightweight plastic gear train, ideal for low-load mechanisms
Comes with servo horns and mounting screws
Runs directly from a 5V rail for small setups
Specifications
Selection facts.
| Type | Analog micro servo |
|---|---|
| Weight | approx 9 g |
| Torque | 1.2-1.8 kg-cm at 4.8-6V |
| Operating voltage | 4.8-6V DC |
| Rotation range | approx 180 degrees |
| Control signal | 50 Hz PWM, ~1-2 ms pulse width |
| Speed | approx 0.1 s/60 degrees at 4.8V |
| Gear material | Plastic (nylon) |
| Dimensions | approx 23 x 12 x 29 mm |
| Connector | 3-wire (signal, VCC, GND) |
Applications
Where it is used.
- Pan-tilt camera and sensor mounts
- Small robotic grippers and arms
- Steering and control surfaces on RC models
- Animatronics and moving props
- Educational robotics and Arduino learning kits
- Latches and small actuated mechanisms in 3D-printed builds
Buying guide
How to choose.
Choose the SG90 when your mechanism is light and you want the lowest-cost, easiest-to-drive servo for learning or a simple build. Its plastic gears are fine for low-stress movement but will wear or strip under heavy load or repeated stalling, so keep the torque demand modest.
For metal-gear durability at a similar size, step up to the MG90S; for much higher torque in a full-size body, look at the MG996R. If you need many servos, power them from a separate 5-6V supply rather than the microcontroller's regulator, and share a common ground.
Pair the SG90 with any board that can output servo PWM: Arduino, ESP32, Raspberry Pi (via a driver) or a PCA9685 servo driver when you need many channels. Servo horns and screws are included, so it drops straight into most brackets.
FAQ
Common questions.
How much torque does the SG90 have?
Roughly 1.2-1.8 kg-cm at 4.8-6V, which is enough for light mechanisms like small grippers and pan-tilt heads but not for heavy arms.
How do I control it with an Arduino?
Connect the signal wire to a PWM-capable pin, VCC to 5V and GND to ground, then use the built-in Servo library and call write() with an angle from 0 to 180.
Can I power it directly from the Arduino 5V pin?
For one servo under light load, usually yes, but the Arduino regulator can brown out under motion. For reliability or multiple servos use a separate 5-6V supply with a shared ground.
Does it rotate a full 360 degrees?
No. The standard SG90 is a positional servo with about 180 degrees of travel. Continuous-rotation variants exist but are a different part.
What is included in the box?
One SG90 servo with its 3-wire lead, plus a set of servo horns and mounting screws.
Is it available in India?
Yes, the TowerPro SG90 is one of the most stocked servos in India and ships quickly from most hobby-electronics sellers.
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