Miuzei MG90S 9G Micro Servo Motor 4-Pack – Metal Geared, High Torque for Arduino and RC Projects
Miuzei MG90S 9G Micro Servo Motor 4-Pack – Metal Geared, High Torque for Arduino and RC Projects
The Miuzei MG90S is a 9-gram micro servo motor with metal gears, built as an upgrade from plastic-geared SG90 servos. This 4-pack delivers a stall torque of 2.0 kg·cm at 4.8V and rotates 180° with a speed of 0.11 seconds per 60 degrees. Operating on 4.8–6V (5V recommended), these compact servos work with Arduino, Raspberry Pi, and various RC vehicles and robots. The aluminum metal teeth and coreless motor reduce noise while increasing precision and durability.
Technical Specifications
| Model | MG90S |
| Type | 9G Micro Servo |
| Material | Metal Gear (Aluminum) |
| Weight per Servo | 9 g |
| Stall Torque (4.8V) | 2.0 kg·cm |
| Operating Speed (4.8V) | 0.11 sec/60° |
| Operating Voltage | 4.8–6V |
| Rotation | 180° |
| Motor Type | Coreless |
| Quantity | 4 units |
How Is the MG90S Different from a Plastic-Geared Servo?
The MG90S replaces the plastic gears of common servos like the SG90 with aluminum metal teeth. This change improves durability under repeated load and reduces gear wear over time. The metal gears also produce less noise during operation. While the overall size and weight stay at 9 grams, the torque output is higher than many plastic-geared servos of the same class. A stable 5V supply is recommended to keep performance consistent, especially when running multiple servos.
Typical Uses and Compatibility
This servo works with most microcontrollers and single-board computers. Hobbyists often use it with Arduino boards for robot arms, biped robots, hexapods, and steering systems in RC cars. It also fits into RC planes, quadcopters, drones, RC boats, and crawlers. Because of its small footprint and 180° rotation, it suits applications where space is limited but precise movement is required. For setups using several servos, an external power source beyond the controller's onboard regulator is advisable.
Build Quality and Longevity
The MG90S is constructed with a coreless motor and aluminum metal gears. The coreless design reduces electrical noise and improves efficiency. The metal gears handle higher stress than plastic alternatives, making the servo less likely to strip teeth during sudden stops or heavy loads. The housing remains the standard 9g micro size, so it fits existing mounts designed for SG90 or similar servos without modification.
Frequently Asked Questions
Does this servo require a separate power supply?
While it can operate on 4.8–6V, a stable 5V supply is recommended for smooth performance. For multi-servo projects, an external power supply is recommended to avoid drawing too much current from the microcontroller's 5V pin.
What is the maximum rotation angle?
The servo rotates 180°, which is standard for most analog servos in this size range.
Can I use these servos with a Raspberry Pi?
Yes, the MG90S is compatible with Raspberry Pi GPIO pins, though a level shifter or external power may be needed depending on the Pi model and load.
Are these servos continuous rotation?
No, they are standard 180° servos, not continuous rotation. They are designed for precise positioning rather than speed.