TowerPro SG90 9g Micro Servo Motor, 180 Degree

The SG90 has become something close to a universal reference point for small hobby servos, and TowerPro's version is the genuine original rather than one of the countless unbranded clones that have since flooded the market under the same SG90 name. Weighing just 9 grams, it's light enough to mount on small RC planes, camera gimbals, robotic grippers, and animatronic builds without meaningfully affecting overall weight or balance.

Internally it uses a 3-pole ferrite motor paired with all-nylon gearing and a top ball bearing, a combination that keeps the servo smooth and reasonably durable for its size and price point, even if it doesn't match the metal-gear durability of heavier-duty servos meant for continuous high-load use. Output torque is rated at 1.6kg-cm at 4.8V, modest but entirely appropriate for the lightweight mechanisms this servo is intended for rather than anything load-bearing. Operating speed comes in at 0.12 seconds per 60 degrees of rotation, snappy enough for responsive RC control surfaces or quick robotic gripper actuation.

Operating voltage spans 4.8V to 6.0V, matching standard RC receiver battery packs and most hobby servo-driving setups without needing a separate regulated supply. Physical dimensions are compact at 21.5 x 11.8 x 22.7mm, small enough to tuck into tight RC aircraft fuselages, gimbal mechanisms, or small robot chassis designs where space is at a premium.

Builders working on a small RC plane's control surfaces, a camera pan-tilt gimbal, a robotic gripper, or any lightweight mechanism needing basic positional servo control will find the genuine TowerPro SG90 a well-proven, extensively documented choice - precisely because it's been the default recommendation in hobby servo tutorials for years.