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The TowerPro SG90 is one of the most widely used micro servo motors in hobby electronics, at just 9g and small enough to fit into tight spaces on a small robot, drone, RC plane or animatronic build. Inside, it uses a 3-pole ferrite motor with an all-nylon gear train, a common and cost-effective combination for a servo in this size and price class, along with a top ball bearing that keeps the output shaft running smoothly with less wobble than a plain bushing.
It runs on an operating voltage of 4.8V to 6.0V, produces 1.6kg-cm of torque at 4.8V, and moves at a speed of 0.12 seconds per 60 degrees, quick enough for most small control-surface or pointing tasks. Its overall dimensions are 21.5 x 11.8 x 22.7mm.
Because it is such a common part, it is well documented and widely supported by servo libraries on Arduino, ESP32 and similar microcontrollers, making it an easy first servo for beginners. Its nylon gears and modest torque rating mean it is best suited to light loads: small control surfaces, sensor pan-tilt mounts, simple robot grippers and similar tasks rather than anything needing to lift meaningful weight or push against strong resistance.
For projects that need more torque or all-metal gears for durability under load, a larger or metal-gear servo such as the MG995 would be a better fit, but for size, weight and cost, the SG90 remains a standard choice across the hobby.
Hobbyists building small robots, RC models, camera gimbals or any project needing a lightweight, low-cost servo for light-duty motion will find the SG90 a dependable and easy-to-source part.
9 grams.
All-nylon gears.
1.6kg-cm at 4.8V.
4.8V to 6.0V.
No, its nylon gears and modest torque suit light-duty tasks; heavier loads need a metal-gear servo instead.
| Brand | TowerPro |
|---|---|
| Weight | 9.000000 g |
| Selling unit | PCS |
