The MG90S bridges the gap between ultra-light 9g plastic servos and heavy standard servos. Its core strength lies in its metal gear train, which effectively eliminates “gear stripping”—the most common cause of servo failure in RC flight.
Unlike the older analog versions, the modern Digital MG90S utilizes a microprocessor to analyze the incoming PWM signal, resulting in a significantly smaller “deadband” . This means the servo reacts to the slightest stick movements with extreme precision, making it a favorite for tail-rotor control on helicopters and ailerons on high-speed park flyers.
Key Performance Highlights:
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Anti-Strip Metal Gears: Full metal internal gearing (often including a brass/aluminum mix) provides the resilience needed to survive minor crashes and high-G maneuvers.
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Digital Precision: Faster internal refresh rates (300Hz) offer higher holding torque and smoother travel compared to traditional analog servos.
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Ball Bearing Support: Features a bearing on the output shaft to reduce friction and eliminate the “wobble” that can develop in bushings over time.
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Micro-Size Powerhouse: At just 13.4g, it outputs over 2.0kg of stall torque, allowing it to handle the control surfaces of planes weighing up to 1.5kg.
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Universal Compatibility: Uses a standard JR-style connector, making it plug-and-play with almost all RC receivers, Arduino, and flight controllers (Betaflight/iNav).
Technical Specifications:
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Weight: 13.4g
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Dimensions: 22.8 x 12.2 x 28.5 mm
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Operating Voltage: 4.8V to 6.0V
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Gear Type: Metal Gears
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Rotation: 180° (standard) or 360° (continuous rotation variants)
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