Emax Es08ma Ii Datasheet [better] May 2026

The EMAX ES08MA II is a high-performance, ultra-compact analog micro servo widely utilized in RC aviation, robotics, and small-scale automotive projects. Renowned for its durability, this servo features a full metal gear train housed in a 12g form factor, making it a reliable choice for high-stress applications like 450-class helicopter cyclic controls or 1/24 scale crawler steering. Core Technical Specifications

The following data outlines the operational parameters of the EMAX ES08MA II under standard conditions. EMAX ES08MA II 12G analog servo drive with metal gearbox

Characteristics * Working voltage: 4.8V ~ 6.0V. * Operating current: 200mA. * Speed: 0.12sec / 60g at 4.8V; 0.10sec / 60g at 6V. * Amazon.com

Ultimate Guide to the Emax ES08MA II: More Than Just a Budget Servo

If you’ve spent any time in the RC or micro-robotics world, you’ve likely encountered the Emax ES08MA II

. Often hailed as the "king of micro servos," it strikes a rare balance between affordability and durability. Whether you're upgrading an Axial SCX24

, building a custom 3D-printed robot, or looking for a reliable fixed-wing surface control, this guide breaks down the essential datasheet specs and why it matters for your build. 🛠 Emax ES08MA II Technical Specifications

At its core, the ES08MA II is a 12g analog micro servo with a full metal gear train. Here is the data you need to know: Specification Operating Voltage 4.8V – 6.0V Stall Torque (4.8V) 1.6 kgf·cm (21.0 oz·in) Stall Torque (6.0V) 2.0 kgf·cm (28.0 oz·in) Operating Speed (4.8V) 0.12 sec / 60° (no load) Operating Speed (6.0V) 0.10 sec / 60° (no load) Dimensions 23 x 11.5 x 24 mm Gear Material Signal Type Spline Count 15T (Standard Mini) 🚀 Key Performance Highlights 1. Full Metal Gear Train

Unlike the plastic gears found in standard 9g servos (like the SG90), the Emax ES08MA II

utilizes a robust metal gear setup. This is a game-changer for high-stress applications—like steering a heavy micro crawler—where plastic gears would typically strip. 2. Compact Powerhouse

Weighing only 12g, this servo delivers up to 2.0 kg of torque at 6V. For context, that’s enough power to handle many 1/24 scale vehicles and light 1/18 scale planes without adding significant bulk. 3. Reliability & Compatibility

The ES08MA II is widely compatible with most receivers (FUT/JR plugs). It is a "standard" upgrade for the Axial SCX24 community, frequently paired with the INJORA Aluminum Servo Mount for a rock-solid steering setup. ⚠️ Pro-Tips for Your Build Mind the Voltage:

While it performs best at 6V, ensure your BEC (Battery Eliminator Circuit) can handle the current. Some users suggest checking for stall current draw to avoid "brownouts" on power-hungry systems. Analog vs. Digital: Keep in mind that this is an

servo. While highly reliable, digital servos often offer more precision and holding power (albeit at a higher cost). The Spline: This servo uses a 15T spline

. If you are buying aftermarket servo horns or mounts, double-check that they are compatible with this specific tooth count. Final Verdict

The Emax ES08MA II remains one of the best value-for-money upgrades in the hobby space. If you need a small, metal-geared servo that won't break the bank, this is the industry standard. high-voltage (HV)

EMAX ES08MA II Datasheet: A Comprehensive Review

The EMAX ES08MA II is a high-performance brushless motor designed for RC enthusiasts and drone enthusiasts. As a popular choice among hobbyists, it's essential to dive into the datasheet to understand its capabilities, features, and applications. In this blog post, we'll provide an in-depth analysis of the EMAX ES08MA II datasheet, covering its specifications, characteristics, and more.

Overview of EMAX ES08MA II

The EMAX ES08MA II is a brushless motor designed for RC aircraft, quadcopters, and drones. It's a part of the EMAX series, known for its high-quality and reliable motors. The ES08MA II is a popular choice among hobbyists due to its high efficiency, high torque, and compact design.

Datasheet Analysis

The EMAX ES08MA II datasheet provides detailed specifications and characteristics of the motor. Here's a breakdown of the key parameters:

• Motor Type: Brushless Outrunner (BLDC)
• KV Rating: 3800KV ( RPM/V )
• Voltage: 2-3S Lipo (7.4V - 11.1V)
• No-Load Current: 1.2A
• Max Continuous Current: 25A
• Max Burst Current: 35A (10 seconds)
• Power: 320W (Max)
• Efficiency: ≥ 85%
• Weight: 63g
• Dimensions: 28.5mm x 22mm x 7.5mm
• Shaft Diameter: 3mm
• Mounting Holes: 16mm x 16mm

Performance Characteristics

The EMAX ES08MA II datasheet also provides performance characteristics, including:

• RPM Range: 0 - 3800KV x 11.1V = 42,180 RPM
• Torque: 0.32 N.m
• Thrust: 1.8 kg (with 8045 Propeller)

Key Features

The EMAX ES08MA II boasts several key features that make it an attractive choice for RC enthusiasts:

• High Efficiency: The motor has an efficiency of ≥ 85%, ensuring minimal energy loss and reduced heat generation.
• High Torque: The motor provides a high torque of 0.32 N.m, making it suitable for demanding applications.
• Compact Design: The motor's compact design (28.5mm x 22mm x 7.5mm) makes it ideal for small to medium-sized RC aircraft and drones.
• Lightweight: The motor weighs only 63g, contributing to reduced overall weight and improved power-to-weight ratio.

Applications

The EMAX ES08MA II is suitable for various RC applications, including:

• Quadcopters: The motor is a popular choice for quadcopters, providing high efficiency, high torque, and compact design.
• RC Aircraft: The motor is suitable for RC aircraft, including trainers, aerobatic planes, and scale models.
• Drones: The motor can be used in drones, including racing drones, freestyle drones, and industrial drones.

Conclusion

The EMAX ES08MA II datasheet provides a comprehensive overview of the motor's specifications, characteristics, and features. With its high efficiency, high torque, and compact design, the motor is an excellent choice for RC enthusiasts and drone hobbyists. Whether you're building a quadcopter, RC aircraft, or drone, the EMAX ES08MA II is definitely worth considering.

Recommendations

Based on the datasheet analysis, here are some recommendations:

• Propeller Selection: Choose a propeller that matches the motor's specifications, such as the 8045 propeller.
• ESC Selection: Select an ESC that can handle the motor's maximum continuous current (25A) and burst current (35A).
• Battery Selection: Choose a battery with a suitable voltage range (2-3S Lipo) and capacity to match the motor's requirements.

By following these recommendations and understanding the EMAX ES08MA II datasheet, you can unlock the motor's full potential and enjoy optimal performance in your RC applications.

Overview

The Emax ES08MA II is an upgraded version of the popular ES08MA analog micro servo. It is distinguished by its metal gear train and carbon-brush motor, offering a balance of torque, speed, and durability for its size. This "II" revision typically features improved potentiometer stability and slightly refined tolerances over the original. It is widely used in micro RC aircraft (e.g., 250-450 size helicopters, foamies), lightweight robotics (walking robots, robotic arms), and small-scale DIY projects.

Part 6: Gear Train and Material Analysis

One of the main selling points of the ES08MA II is its metal gear train. Let's disassemble (conceptually) the gear stages:

1. First stage (motor pinion): Brass – directly on motor shaft
2. Second stage: Aluminum alloy – anodized for wear resistance
3. Third stage: Steel – hardened for impact resistance
4. Fourth stage (output): Brass with integrated potentiometer wiper

Compared to the nylon gears of the ES08A (plastic version), the metal gears provide:

• Higher torque capacity (2.0 vs 1.5 kg·cm)
• Better backlash control (0.5° vs 2°)
• Longer lifespan under continuous load
• No gear stripping under sudden impacts

Trade-off: Metal gears transmit more vibration and are slightly noisier. They also add 2g of weight compared to the plastic version.

7. Application Notes & Limitations

Key Features

• Metal Gears – Alloy metal output gear and internal gears for enhanced crash resistance and longer lifespan compared to nylon gears.
• Coreless Motor Option – Note: The ES08MA II typically retains a standard 3-pole motor (not coreless) to keep cost low, but check vendor specifics.
• Dual Ball Bearings – One on the output shaft and one on the case top for smooth, friction-reduced rotation.
• Compact & Light – Standard micro servo size with a weight of approximately 12–13g (including wires and horn).
• Analog Control – Standard 50Hz PWM (Pulse Width Modulation) signal; requires a constant refresh signal.

Conclusion: Is the Emax ES08MA II Right for You?

The Emax ES08MA II datasheet reveals a servo that punches above its weight class. For under $10 (often $6-8 in bulk), you get metal gears, dual ball bearings, and a reliable analog control system that works with virtually every microcontroller and RC receiver.

When to choose the ES08MA II:

• You need durability without breaking the bank.
• Your project operates at 5-6V (USB, 4xAA, or 2S LiFePO4).
• You have space for a 23x12mm footprint.

When to look elsewhere:

• You require digital servo precision (e.g., for camera gimbals).
• You need continuous rotation (modding is possible but not recommended).
• Your voltage is fixed at 3.7V (1S LiPo) – the ES08MA II will be sluggish.

By keeping this guide bookmarked, you have a living datasheet that explains not just the numbers, but the practical reality of using the Emax ES08MA II in your next robotic or RC creation.

Last updated: 2025. Specifications subject to change by manufacturer. Always verify with a multimeter before connecting to power.

The EMAX ES08MA II is a 12-gram analog micro servo featuring metal gears designed for high-stress applications in RC aircraft and robotics. Operating between 4.8V and 6.0V, it provides up to 2.0 kg.cm of stall torque with high durability compared to plastic-geared alternatives. For detailed specifications and technical data, you can consult the manufacturer's official documentation. 

Part 1: Overview – What is the Emax ES08MA II?

The Emax ES08MA II is an upgraded version of the classic ES08A. The most significant change is the gear train. While the original ES08A used nylon gears, the "MA" designation signifies Metal gears (specifically brass and aluminum), while the "II" indicates the second generation of this metal-geared design.

7.1 Robotics

• Small robotic arms (3-4 DOF)
• Biped walker hip/knee joints (up to 1kg robot)
• Robotic grippers (high holding torque)

2.5 Current Drain

• Idle: 5 – 10 mA
• Operating (no load): 150 – 200 mA
• Stall: 800 – 1100 mA (1.1A peak)

Critical Note for Builders: Do not power this servo directly from an Arduino or Raspberry Pi 5V pin. The stall current over 1A will brown out your microcontroller. Use a dedicated 5V UBEC (Battery Eliminator Circuit) or servo driver board with external power.