SupSeek MG90S 9g Micro Servo Motor Kit (4pcs) – Metal Gear, 2.0 kg-cm Torque, 0.08 sec/60° for RC Planes, Arduino, Robotics

The SupSeek MG90S micro servo delivers 2.0 kg·cm torque at 6V with a speed of 0.08 sec/60°, making it a solid choice for RC planes, cars, and Arduino projects. This 9g servo integrates copper-aluminum metal gears to resist wear, dual bearings for shaft stability, and a digital circuit that runs quietly below 40 dB. Each servo offers 180° rotation, a PWM 3-pin Futaba-compatible connector, and a 250 mm cable. The kit includes four servos plus three mini servo arms and screws for straightforward mounting.

Why Choose Metal Gears Over Plastic?

Plastic gears in standard servos like the SG90 can strip under load or impact. The MG90S uses hardened copper-aluminum metal gears with backlash kept to 3° or less. This reduces slop and extends the servo's usable life in applications where vibrations or sudden forces occur, such as RC plane control surfaces or robotic arms.

Technical Details at a Glance

Will This Servo Work with My Arduino?

Yes. The servo uses a standard PWM signal on a 3-pin connector that matches Arduino headers (signal, VCC, GND). Many Arduino libraries support 180° servos directly. The included arms and screws let you attach control horns or linkages without extra hardware. For Raspberry Pi, a PWM driver board is recommended, though direct GPIO control is possible with careful timing.

Plug-and-Play Setup

Each servo comes with a 250 mm cable terminated in a Futaba-compatible female connector. This works with most RC receivers and Arduino shields without soldering. The pack contains four identical servos, plus three small servo arms and mounting screws. No additional wiring or adapters are needed for basic use.

Common Questions Answered

Is the MG90S a drop-in replacement for SG90?

Yes. Dimensions and mounting holes match the standard 9g servo footprint. The metal gears provide greater durability without changing the form factor.

How precise is the centering?

The deadband is ±5 μs, which helps the servo hold position without constant jitter. The digital control loop also reduces drift compared to analog servos.

Can I use these servos in a robot arm?

For light robot arms with small loads, the 2.0 kg·cm torque is sufficient. The dual bearings help support side loads better than single-bushing designs.

What voltage should I run them at?

At 6V you get maximum torque and speed, but 4.8V is safe for most receivers. Check your controller's output rating before connecting.