Emax USA

EMAX ES9055II High Voltage Magnetic Encoder Servo

$49.80 USD Sold out
Notes
EMAX ES9055II high voltage magnetic encoder digital servo for high-load RC and robotics applications
EMAX / HIGH-TORQUE SERVO

Torque that holds position.

The EMAX ES9055II pairs non-contact magnetic-encoder feedback with an all-metal case and gear train, delivering up to 35 kgf·cm for high-load aircraft, helicopter and robotic control.

Maximum torque35 kgf·cmAt 8.4V
Maximum speed0.12 secPer 60° at 8.4V
FeedbackMagneticContactless encoder
HV range6.0–8.4V2S-capable system range
01 / Performance by voltage

Choose the torque your load demands.

Published torque and transit speed are paired at every rated voltage, helping you size the linkage and power system with less guesswork.

Power-system check: Size the receiver, BEC, wiring and battery path for the servo's approximately 4.0–5.5A stall-current reference range.
6.0VControlled authority
Stall torque25 kgf·cm
Transit speed0.17 sec/60°
7.4V2S nominal
Stall torque30 kgf·cm
Transit speed0.14 sec/60°
8.4VFull rated output
Stall torque35 kgf·cm
Transit speed0.12 sec/60°
02 / High-load control

More holding authority where leverage works against you.

For larger control surfaces and loaded mechanisms, the ES9055II prioritizes torque and positional control. Its magnetic encoder continuously reports position without a sliding feedback contact, supporting repeatable centering through vibration and long duty cycles.

EMAX ES9055II servo with torque and return-to-center visual effects
01

35 kgf·cm at 8.4V

High holding torque for demanding linkages, control surfaces and articulated joints.

02

Magnetic feedback

Contactless sensing is designed for consistent centering under vibration and repeated motion.

03

All-metal drivetrain

Metal gears and housing support load transfer while helping dissipate operating heat.

03 / Application fit

Built for mechanisms that ask more from a standard-size servo.

Heavy-duty fixed wingHigh holding torque for larger primary control surfaces and demanding linkage geometry.
High-load helicoptersMagnetic feedback and an all-metal drivetrain for vibration-intensive control roles.
Robotic joints180° or full-range 360° positional control for loaded articulated mechanisms.
Custom automationStandard PWM input for fixtures, rotating mechanisms and repeated-position tasks.
04 / Specifications and fitment

Verify the interface before installation.

Servo type Magnetic encoder / brushed / digital / all-metal
Operating voltage 6.0–8.4V
Speed at 6.0 / 7.4 / 8.4V 0.17 / 0.14 / 0.12 sec/60°
Stall torque at 6.0 / 7.4 / 8.4V 25 / 30 / 35 kgf·cm
Stall current Approx. 4.0–5.5A typical reference range
Rotation 180° ±2°; supports 360° full-range positional control
PWM range 500–2500μs
Connector JR
Output spline 23T
Dimensions Approx. 40 × 20 × 38.5 mm
Net weight 78.5 ±1g
  • Confirm 23T horn compatibility
  • Confirm the servo bay accepts a 40 × 20 mm footprint
  • Confirm receiver/BEC voltage does not exceed 8.4V
  • Confirm the power path supports servo peak current
  • Center electronically before installing the horn
  • Set endpoints to prevent linkage binding
Important: “360° positional control” is not uncontrolled continuous rotation. The controller must support the required pulse range and position mode.
05 / Compatibility FAQ

Answers before installation.

Will it work with a standard PWM receiver?

Yes. The ES9055II uses a JR connector and 500–2500μs PWM control. Confirm that the receiver or controller supports the travel range required by your setup.

Can I run it from a 2S LiPo system?

The 6.0–8.4V rating covers the nominal and fully charged voltage of a 2S LiPo system. The receiver, BEC, wiring and every connected device must also be rated for the selected voltage and current demand.

Why choose the ES9055II over a faster servo?

The ES9055II emphasizes torque and holding authority, reaching 35 kgf·cm at 8.4V. It is a strong fit when the mechanism's load and leverage matter more than minimum transit time.

Is the ES9055II brushless?

No. The verified specification identifies a brushed motor with digital control, a magnetic encoder, metal gears and an all-metal housing.

What is included?

One ES9055II servo, a servo-horn and mounting-hardware kit, and a user instruction manual.

Installation note: Published torque, speed and current values are reference specifications measured under defined test conditions. Actual response, holding performance, temperature and current draw depend on supply voltage, linkage geometry, mechanical load, endpoint settings, airflow and power-system capability. Avoid binding the linkage or stalling the servo for extended periods.
Product information

All parts are shipped fast from SYRACUSE, NEW YORK & some DROP SHIP ORDERS from San Diego, California. If there's an issue with something, please let us know and we will do our best make it right! SaltCtyRacingFPV, LLC dba "weBLEEDfpv.com" offers a (30) day return policy on all new unopened equipment, starting from the date the product(s) was delivered to the customer. Anything beyond (30) days of delivery will not be eligible for return. If the product(s) received have been opened, used or damaged, no return options will be offered. If the item is in brand new condition but requires to be repackaged, a (15%) restocking fee will be applied. The shipping cost for any unwanted product will not be refunded by SaltCtyRacingFPV "weBLEEDfpv.com" (It is recommended to choose a return shipping method with tracking).

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Please email at SaltCtyRacingFPV@gmail.com to contact us and initiate a return. Please contact us first before sending anything back. 

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Flight Controller / VTX Warranty Policy
 
At weBLEEDfpv, we are committed to providing high-quality products. However, due to the technical nature of flight controllers and VTX's the precision required for installation, our warranty policy for flight controllers is as follows:
 
1. No Warranty Post-Soldering: 
   Once any soldering has been performed on the flight controller / VTX's, we are no longer responsible for replacements, repairs, or refunds. The process of soldering can introduce various factors that may lead to damage, and we are unable to control or verify the conditions in which the soldering was conducted.
   
2. Pre-Soldering Inspection: 
   Before you begin soldering, we recommend carefully inspecting the flight controller  / VTX's for any potential issues. If any defects or issues are found prior to soldering, please contact us immediately for a replacement.
 
3. User Responsibility: 
   Soldering requires skill and experience, and improper techniques may result in damage to the flight controller, including but not limited to overheating or lifting solder pads. Please ensure you are confident in your soldering abilities before proceeding, as we cannot be held liable for any damages caused during installation.
 
4. Final Sale: 
   All flight controller sales are final once the product has been modified or soldered. We are unable to offer returns or exchanges on used or modified products.
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⚠️ FPV DIGITAL SYSTEM NOTICE

HDZero, Walksnail, VTX systems, and ultra-micro FPV electronics generate heat quickly while powered and require proper handling during setup and troubleshooting.

Bench setup without airflow/cooling can result in excessive heat buildup.

Once powered, configured, firmware updated, soldered, flown, or modified, products are considered used.

Manufacturer warranty may apply for BNF drones and electronic systems.

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Lithium Ion Battery No Acceptance Policy

For our lithium ion battery products, all sales are final. This means:

  • No Returns or Exchanges: Once your purchase is completed, we do not accept returns, exchanges, or cancellations.
  • Customer Responsibility: Please review all product specifications and details carefully before making your purchase.
  • Safety and Compliance: Due to safety standards and regulatory guidelines, we cannot process any post-sale modifications.

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Thank you for your understanding.

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