The EMAX ES08MA II Go to product viewer dialog for this item. is a widely used 12g high-torque analog micro servo featuring a full metal gear train. It is designed for reliability in RC models, including aircraft, gliders, and small robots. Technical Specifications Specification Servo Type Gear Material Operating Voltage 4.8V – 6.0V Stall Torque 1.6 kg.cm @ 4.8V | 2.0 kg.cm @ 6.0V Operating Speed 0.12 sec/60° @ 4.8V | 0.10 sec/60° @ 6.0V Dimensions 23.0 x 11.5 x 24.0 mm Weight 12.0g (0.42 oz) Dead Band 1–2 μsec Plug Type Futaba / JR Universal Operational Features Direction of Rotation : Counter-clockwise (standard) for pulse traveling from 1500 to 1900 μsec. Connector Wire : Approximately 25 cm (9.8 in) standard lead. Operating Current : Typically 200mA at a 60° rotation speed. Compatibility : Works with standard RC receivers and microcontrollers like Raspberry Pi or Arduino for robotics. Performance Insights Durability : Expert and user feedback from sources like Amazon highlights its metal gears as a major strength for high-stress applications. Response : Known for smooth operation and low backlash due to its dual-bearing system. Mounting : The compact size makes it a popular choice for replacing stock servos in 1/24 scale crawlers (e.g., Axial SCX24). Variants Note that a High Voltage (HV) version exists, the EMAX ES08MA II HV Go to product viewer dialog for this item. , which supports up to 8.4V and offers higher torque (up to 2.4 kg.cm).
EMAX ES08MA II — Overview & Detailed Datasheet Article Introduction The EMAX ES08MA II is a widely used micro metal-geared servo designed for radio-controlled models, robotics, and hobby electronics where compact size, moderate torque, and precise control are required. It offers an upgraded metal gear train, improved durability, and reliable performance for micro applications such as small airplanes, helicopters, multirotors, RC cars, and miniature robot joints.
Key Specifications (typical)
Model: ES08MA II Type: Micro analogue servo (standard 3-wire PWM control) Case material: Plastic with metal gears (metal gear train) Weight: ~12–13 g Dimensions: 22.8 × 11.6 × 26.6 mm (approx.) Operating voltage: 4.8–6.0 V (nominal); safe operation often specified at 4.8 V and 6.0 V Recommended supply: 5–6 V regulated battery or BEC Stall torque: Emax Es08ma Ii Datasheet
~1.5–2.0 kg·cm (at 4.8 V) ~2.0–2.5 kg·cm (at 6.0 V)
Speed:
~0.12–0.14 s/60° (at 4.8 V) ~0.10–0.12 s/60° (at 6.0 V) The EMAX ES08MA II Go to product viewer
Deadband: ~5–10 µs (typical for analog micro servos) Connector: Standard 3-pin JR/SR female (servo lead with female housing: Signal, V+, GND) Operating temperature: -10°C to +50°C (typical hobby servo range) Bearing type: Single ball bearing or bushing (depends on batch) Gears: Metal gears (improved wear resistance vs. plastic gears) Mounting: Standard micro-servo mounting tabs (2 screws) Accessories: Set of plastic horns, mounting hardware, lead wire (usually 200–300 mm)
Notes: Values above are typical ranges reported across EMAX ES08MA II product listings and hobbyist testing. Exact figures depend on production batch and testing method.
Mechanical & Electrical Details
The metal gear train improves torque capacity and gear life compared to fully plastic-geared micro servos, making ES08MA II more suitable for applications with moderate loads or repeated actuation. Internal potentiometer for position feedback typical of analog servos. Power draw rises under load; ensure your supply can provide peak currents (often several hundred mA) without voltage sag—use decoupling capacitors or a regulated BEC for multi-servo setups. Typical wiring: Brown (GND) — Red (V+) — Orange/White (Signal). Confirm color convention on your unit.
Performance and Use Cases