EMAX ES9055II High Voltage Magnetic Encoder Servo

The EMAX ES9055II is a heavy-duty, high-voltage all-metal digital servo engineered for demanding heli tail, fixed-wing control surface, robotic joint, and automation applications. Built around a contactless magnetic encoder, the ES9055II delivers drift-free centering under sustained vibration with up to 35 kgf·cm of stall torque at 8.4V. Configurable for 180° or full 360° positional control, with a standard JR connector and 23T spline for drop-in compatibility with existing installations.

Key Features

Non-contact magnetic encoder — stable centering during vibration and long operating cycles
All-metal case and gear train for heavy-duty durability
High voltage operation: 6.0–8.4V (2S LiPo direct compatible)
Up to 35 kgf·cm stall torque @ 8.4V
Configurable 180° ±2° or full 360° positional control
Standard JR connector and 23T spline
PWM range: 500–2500μs

Recommended Applications

Heavy-duty fixed-wing aircraft control surfaces
High-load RC helicopters
Robotic joints and rotating mechanisms
Special-purpose RC and automation equipment

Specifications

Product Type: Magnetic Encoder / Brushed / Digital / All-Metal Servo
Application: Digital Servo for Heli Tail
Operating Voltage: 6.0–8.4V
Speed: 0.17 / 0.14 / 0.12 sec/60° (@ 6.0 / 7.4 / 8.4V)
Stall Torque: 25 / 30 / 35 kgf·cm (@ 6.0 / 7.4 / 8.4V)
Stall Current: Approx. 4.0–5.5A
Net Weight: 78.5 ±1g
Dimensions: Approx. 40 × 20 × 38.5mm
Rotation Angle: 180° ±2°; supports 360° full-range positional control
Connector: JR
Output Spline: 23T
PWM Range: 500–2500μs