EMAX ES3059MD 12g Metal Gear Digital Servo - Precise Mini Actuator for RC Airplanes

The EMAX ES3059MD 12g Metal Gear Digital Servo provides an ideal balance between weight optimization and rugged geartrain strength for demanding aviation layouts and DIY automation projects.

Digital Amplifier Precision & Holding Power :

Unlike conventional analog micro servos that suffer from lazy centering loops and weak holding force under load, the ES3059MD utilizes high-frequency digital microprocessor circuitry. This system processes incoming PWM pulses instantly to deliver maximum corrective torque immediately, locking your plane's control surfaces or robot joints firmly in place even during high-velocity maneuvers.

Durable Combined Hybrid Gear Train :

To ensure superior crash survival rates while maintaining lightweight efficiency, EMAX utilizes a unique internal gear matrix composed of 3 high-tensile metal outer gears and 3 structural inner plastic gears. This hybrid pairing absorbs sudden structural shock loads cleanly, preventing stripped gear teeth from hard 3D aerobatic impacts or sudden servo reversals.

Wide Signal Compatibility Spectrum :

This servo operates smoothly over an extended pulse width modification input window ranging from 500µs to 2500µs.This comprehensive range allows it to hit a broad 90-degree standard travel envelope during standard transmitter inputs, scaling all the way up to an expansive 180-degree maximum physical rotation when paired with advanced drone flight controllers or specialized robotic microcontrollers.

Universal Drop-In Wiring Footprint :

Housed in a compact, space-saving casing measuring just 23.7mm x 24.2mm x 11.6mm, this mini servo integrates flawlessly into tight structural bays. It comes factory pre-wired with a standard JR/Futaba-style receiver connector on a generous 25cm high-flex lead wire, ensuring a clean connection back to your main electronics tray.

Specification :

• Brand: EMAX

• Model Name: ES3059MD

• Servo Architecture Type: Digital System

• Control Protocol: Pulse Width Modulation (PWM)

• Operating Voltage Bounds: 4.8V to 6.0V DC Input (Do not use raw 2S LiPo)

• Stall Torque Output (4.8V): 1.8 kg.cm

• Stall Torque Output (6.0V): 2.1 kg.cm

• Transit Speed Rating (4.8V): 0.13 sec / 60 degrees

• Transit Speed Rating (6.0V): 0.11 sec / 60 degrees

• Maximum Current Pull (6.0V): 1.0A (Stall threshold)

• Idle Current Draw: 7.4mA

• Gear Matrix Assembly: Hybrid (3 Metal Gears + 3 Plastic Gears)

• Output Spline Profile: 15T Flower Head Spline

• Neutral Positioning Point: 1500µs

• Pulse Width Operating Envelope: 500µs to 2500µs

• Maximum Mechanical Travel: 180° +/- 10°

• Physical Housing Size: 23.7mm x 24.2mm x 11.6mm

• Net Hardware Weight: 12.3g (+/- 0.5g)

Frequently Asked Questions :

Q1: Can I power the EMAX ES3059MD servo directly from a 2S LiPo receiver pack?

Ans: No, you should never connect this servo directly to a raw 2S LiPo battery (7.4V nominal / 8.4V fully charged), as doing so will burn out the digital control board. This servo is strictly rated for a maximum input of 6.0V. You must use a regulated 5V or 6V BEC line from your ESC or a standalone voltage regulator.

Q2: What is the main structural advantage of this hybrid gear arrangement?

Ans: The 3 metal outer gears are positioned at the highest stress point near the output spline to bear heavy external shock loads without stripping. Meanwhile, the 3 plastic inner gears lower the overall physical weight and minimize internal mechanical friction, maximizing motor performance.

Q3: Can I fit standard aftermarket 9g plastic servo horns onto this spline?

Ans: No, standard 9g micro servo horns will not fit.The ES3059MD features a unique, slightly larger 15T spline profile on its output shaft. Always use the specific heavy-duty plastic servo arms and mounting hardware packed inside the factory accessory bag.

Q4: Is this micro digital servo suitable for a 450-class helicopter tail rotor?

Ans: While its 0.11s speed and digital precision allow it to function as a cyclic servo on 450 helicopters or as a budget tail guide, specialized high-performance helicopter gyros require hyper-fast, dedicated tail servos with sub-0.05s response parameters for absolute tail lock.